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312<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li>
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385</ul>
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391 </div>
392 &nbsp;
393 </nav>
394
395 <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
396
397
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409 <li><a href="../index.html">Docs</a> &raquo;</li>
410
411 <li><a href="index.html">Libraries</a> &raquo;</li>
412
413 <li>Shopping Cart Class</li>
414 <li class="wy-breadcrumbs-aside">
415
416 </li>
417 <div style="float:right;margin-left:5px;" id="closeMe">
418 <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
419 </div>
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421 <hr/>
422</div>
423 <div role="main" class="document">
424
425 <div class="section" id="shopping-cart-class">
426<h1>Shopping Cart Class<a class="headerlink" href="#shopping-cart-class" title="Permalink to this headline"></a></h1>
427<p>The Cart Class permits items to be added to a session that stays active
428while a user is browsing your site. These items can be retrieved and
429displayed in a standard “shopping cart” format, allowing the user to
430update the quantity or remove items from the cart.</p>
431<div class="admonition important">
432<p class="first admonition-title">Important</p>
433<p class="last">The Cart library is DEPRECATED and should not be used.
434It is currently only kept for backwards compatibility.</p>
435</div>
436<p>Please note that the Cart Class ONLY provides the core “cart”
437functionality. It does not provide shipping, credit card authorization,
438or other processing components.</p>
439<div class="contents local topic" id="contents">
440<ul class="simple">
441<li><a class="reference internal" href="#using-the-cart-class" id="id1">Using the Cart Class</a><ul>
442<li><a class="reference internal" href="#initializing-the-shopping-cart-class" id="id2">Initializing the Shopping Cart Class</a></li>
443<li><a class="reference internal" href="#adding-an-item-to-the-cart" id="id3">Adding an Item to The Cart</a></li>
444<li><a class="reference internal" href="#adding-multiple-items-to-the-cart" id="id4">Adding Multiple Items to The Cart</a></li>
445<li><a class="reference internal" href="#displaying-the-cart" id="id5">Displaying the Cart</a></li>
446<li><a class="reference internal" href="#updating-the-cart" id="id6">Updating The Cart</a><ul>
447<li><a class="reference internal" href="#what-is-a-row-id" id="id7">What is a Row ID?</a></li>
448</ul>
449</li>
450</ul>
451</li>
452<li><a class="reference internal" href="#class-reference" id="id8">Class Reference</a></li>
453</ul>
454</div>
455<div class="custom-index container"></div><div class="section" id="using-the-cart-class">
456<h2><a class="toc-backref" href="#id1">Using the Cart Class</a><a class="headerlink" href="#using-the-cart-class" title="Permalink to this headline"></a></h2>
457<div class="section" id="initializing-the-shopping-cart-class">
458<h3><a class="toc-backref" href="#id2">Initializing the Shopping Cart Class</a><a class="headerlink" href="#initializing-the-shopping-cart-class" title="Permalink to this headline"></a></h3>
459<div class="admonition important">
460<p class="first admonition-title">Important</p>
461<p class="last">The Cart class utilizes CodeIgniter’s <a class="reference internal" href="sessions.html"><span class="doc">Session
462Class</span></a> to save the cart information to a database, so
463before using the Cart class you must set up a database table as
464indicated in the <a class="reference internal" href="sessions.html"><span class="doc">Session Documentation</span></a>, and set the
465session preferences in your application/config/config.php file to
466utilize a database.</p>
467</div>
468<p>To initialize the Shopping Cart Class in your controller constructor,
469use the <code class="docutils literal"><span class="pre">$this-&gt;load-&gt;library()</span></code> method:</p>
470<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">library</span><span class="p">(</span><span class="s1">&#39;cart&#39;</span><span class="p">);</span>
471</pre></div>
472</div>
473<p>Once loaded, the Cart object will be available using:</p>
474<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span>
475</pre></div>
476</div>
477<div class="admonition note">
478<p class="first admonition-title">Note</p>
479<p class="last">The Cart Class will load and initialize the Session Class
480automatically, so unless you are using sessions elsewhere in your
481application, you do not need to load the Session class.</p>
482</div>
483</div>
484<div class="section" id="adding-an-item-to-the-cart">
485<h3><a class="toc-backref" href="#id3">Adding an Item to The Cart</a><a class="headerlink" href="#adding-an-item-to-the-cart" title="Permalink to this headline"></a></h3>
486<p>To add an item to the shopping cart, simply pass an array with the
487product information to the <code class="docutils literal"><span class="pre">$this-&gt;cart-&gt;insert()</span></code> method, as shown
488below:</p>
489<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
490 <span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;sku_123ABC&#39;</span><span class="p">,</span>
491 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
492 <span class="s1">&#39;price&#39;</span> <span class="o">=&gt;</span> <span class="mf">39.95</span><span class="p">,</span>
493 <span class="s1">&#39;name&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;T-Shirt&#39;</span><span class="p">,</span>
494 <span class="s1">&#39;options&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;Size&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;L&#39;</span><span class="p">,</span> <span class="s1">&#39;Color&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;Red&#39;</span><span class="p">)</span>
495<span class="p">);</span>
496
497<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
498</pre></div>
499</div>
500<div class="admonition important">
501<p class="first admonition-title">Important</p>
502<p class="last">The first four array indexes above (id, qty, price, and
503name) are <strong>required</strong>. If you omit any of them the data will not be
504saved to the cart. The fifth index (options) is optional. It is intended
505to be used in cases where your product has options associated with it.
506Use an array for options, as shown above.</p>
507</div>
508<p>The five reserved indexes are:</p>
509<ul class="simple">
510<li><strong>id</strong> - Each product in your store must have a unique identifier.
511Typically this will be an “sku” or other such identifier.</li>
512<li><strong>qty</strong> - The quantity being purchased.</li>
513<li><strong>price</strong> - The price of the item.</li>
514<li><strong>name</strong> - The name of the item.</li>
515<li><strong>options</strong> - Any additional attributes that are needed to identify
516the product. These must be passed via an array.</li>
517</ul>
518<p>In addition to the five indexes above, there are two reserved words:
519rowid and subtotal. These are used internally by the Cart class, so
520please do NOT use those words as index names when inserting data into
521the cart.</p>
522<p>Your array may contain additional data. Anything you include in your
523array will be stored in the session. However, it is best to standardize
524your data among all your products in order to make displaying the
525information in a table easier.</p>
526<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
527 <span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;sku_123ABC&#39;</span><span class="p">,</span>
528 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
529 <span class="s1">&#39;price&#39;</span> <span class="o">=&gt;</span> <span class="mf">39.95</span><span class="p">,</span>
530 <span class="s1">&#39;name&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;T-Shirt&#39;</span><span class="p">,</span>
531 <span class="s1">&#39;coupon&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;XMAS-50OFF&#39;</span>
532<span class="p">);</span>
533
534<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
535</pre></div>
536</div>
537<p>The <code class="docutils literal"><span class="pre">insert()</span></code> method will return the $rowid if you successfully insert a
538single item.</p>
539</div>
540<div class="section" id="adding-multiple-items-to-the-cart">
541<h3><a class="toc-backref" href="#id4">Adding Multiple Items to The Cart</a><a class="headerlink" href="#adding-multiple-items-to-the-cart" title="Permalink to this headline"></a></h3>
542<p>By using a multi-dimensional array, as shown below, it is possible to
543add multiple products to the cart in one action. This is useful in cases
544where you wish to allow people to select from among several items on the
545same page.</p>
546<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
547 <span class="k">array</span><span class="p">(</span>
548 <span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;sku_123ABC&#39;</span><span class="p">,</span>
549 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
550 <span class="s1">&#39;price&#39;</span> <span class="o">=&gt;</span> <span class="mf">39.95</span><span class="p">,</span>
551 <span class="s1">&#39;name&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;T-Shirt&#39;</span><span class="p">,</span>
552 <span class="s1">&#39;options&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;Size&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;L&#39;</span><span class="p">,</span> <span class="s1">&#39;Color&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;Red&#39;</span><span class="p">)</span>
553 <span class="p">),</span>
554 <span class="k">array</span><span class="p">(</span>
555 <span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;sku_567ZYX&#39;</span><span class="p">,</span>
556 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
557 <span class="s1">&#39;price&#39;</span> <span class="o">=&gt;</span> <span class="mf">9.95</span><span class="p">,</span>
558 <span class="s1">&#39;name&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;Coffee Mug&#39;</span>
559 <span class="p">),</span>
560 <span class="k">array</span><span class="p">(</span>
561 <span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;sku_965QRS&#39;</span><span class="p">,</span>
562 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
563 <span class="s1">&#39;price&#39;</span> <span class="o">=&gt;</span> <span class="mf">29.95</span><span class="p">,</span>
564 <span class="s1">&#39;name&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;Shot Glass&#39;</span>
565 <span class="p">)</span>
566<span class="p">);</span>
567
568<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
569</pre></div>
570</div>
571</div>
572<div class="section" id="displaying-the-cart">
573<h3><a class="toc-backref" href="#id5">Displaying the Cart</a><a class="headerlink" href="#displaying-the-cart" title="Permalink to this headline"></a></h3>
574<p>To display the cart you will create a <a class="reference internal" href="../general/views.html"><span class="doc">view
575file</span></a> with code similar to the one shown below.</p>
576<p>Please note that this example uses the <a class="reference internal" href="../helpers/form_helper.html"><span class="doc">form
577helper</span></a>.</p>
578<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nx">form_open</span><span class="p">(</span><span class="s1">&#39;path/to/controller/update/method&#39;</span><span class="p">);</span> <span class="cp">?&gt;</span>
579
580<span class="p">&lt;</span><span class="nt">table</span> <span class="na">cellpadding</span><span class="o">=</span><span class="s">&quot;6&quot;</span> <span class="na">cellspacing</span><span class="o">=</span><span class="s">&quot;1&quot;</span> <span class="na">style</span><span class="o">=</span><span class="s">&quot;width:100%&quot;</span> <span class="na">border</span><span class="o">=</span><span class="s">&quot;0&quot;</span><span class="p">&gt;</span>
581
582<span class="p">&lt;</span><span class="nt">tr</span><span class="p">&gt;</span>
583 <span class="p">&lt;</span><span class="nt">th</span><span class="p">&gt;</span>QTY<span class="p">&lt;/</span><span class="nt">th</span><span class="p">&gt;</span>
584 <span class="p">&lt;</span><span class="nt">th</span><span class="p">&gt;</span>Item Description<span class="p">&lt;/</span><span class="nt">th</span><span class="p">&gt;</span>
585 <span class="p">&lt;</span><span class="nt">th</span> <span class="na">style</span><span class="o">=</span><span class="s">&quot;text-align:right&quot;</span><span class="p">&gt;</span>Item Price<span class="p">&lt;/</span><span class="nt">th</span><span class="p">&gt;</span>
586 <span class="p">&lt;</span><span class="nt">th</span> <span class="na">style</span><span class="o">=</span><span class="s">&quot;text-align:right&quot;</span><span class="p">&gt;</span>Sub-Total<span class="p">&lt;/</span><span class="nt">th</span><span class="p">&gt;</span>
587<span class="p">&lt;/</span><span class="nt">tr</span><span class="p">&gt;</span>
588
589<span class="cp">&lt;?php</span> <span class="nv">$i</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span> <span class="cp">?&gt;</span>
590
591<span class="cp">&lt;?php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">contents</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$items</span><span class="p">)</span><span class="o">:</span> <span class="cp">?&gt;</span>
592
593 <span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nx">form_hidden</span><span class="p">(</span><span class="nv">$i</span><span class="o">.</span><span class="s1">&#39;[rowid]&#39;</span><span class="p">,</span> <span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;rowid&#39;</span><span class="p">]);</span> <span class="cp">?&gt;</span>
594
595 <span class="p">&lt;</span><span class="nt">tr</span><span class="p">&gt;</span>
596 <span class="p">&lt;</span><span class="nt">td</span><span class="p">&gt;</span><span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nx">form_input</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;name&#39;</span> <span class="o">=&gt;</span> <span class="nv">$i</span><span class="o">.</span><span class="s1">&#39;[qty]&#39;</span><span class="p">,</span> <span class="s1">&#39;value&#39;</span> <span class="o">=&gt;</span> <span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;qty&#39;</span><span class="p">],</span> <span class="s1">&#39;maxlength&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;3&#39;</span><span class="p">,</span> <span class="s1">&#39;size&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;5&#39;</span><span class="p">));</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
597 <span class="p">&lt;</span><span class="nt">td</span><span class="p">&gt;</span>
598 <span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;name&#39;</span><span class="p">];</span> <span class="cp">?&gt;</span>
599
600 <span class="cp">&lt;?php</span> <span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">has_options</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;rowid&#39;</span><span class="p">])</span> <span class="o">==</span> <span class="k">TRUE</span><span class="p">)</span><span class="o">:</span> <span class="cp">?&gt;</span>
601
602 <span class="p">&lt;</span><span class="nt">p</span><span class="p">&gt;</span>
603 <span class="cp">&lt;?php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">product_options</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;rowid&#39;</span><span class="p">])</span> <span class="k">as</span> <span class="nv">$option_name</span> <span class="o">=&gt;</span> <span class="nv">$option_value</span><span class="p">)</span><span class="o">:</span> <span class="cp">?&gt;</span>
604
605 <span class="p">&lt;</span><span class="nt">strong</span><span class="p">&gt;</span><span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$option_name</span><span class="p">;</span> <span class="cp">?&gt;</span>:<span class="p">&lt;/</span><span class="nt">strong</span><span class="p">&gt;</span> <span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$option_value</span><span class="p">;</span> <span class="cp">?&gt;</span><span class="p">&lt;</span><span class="nt">br</span> <span class="p">/&gt;</span>
606
607 <span class="cp">&lt;?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?&gt;</span>
608 <span class="p">&lt;/</span><span class="nt">p</span><span class="p">&gt;</span>
609
610 <span class="cp">&lt;?php</span> <span class="k">endif</span><span class="p">;</span> <span class="cp">?&gt;</span>
611
612 <span class="p">&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
613 <span class="p">&lt;</span><span class="nt">td</span> <span class="na">style</span><span class="o">=</span><span class="s">&quot;text-align:right&quot;</span><span class="p">&gt;</span><span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">format_number</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;price&#39;</span><span class="p">]);</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
614 <span class="p">&lt;</span><span class="nt">td</span> <span class="na">style</span><span class="o">=</span><span class="s">&quot;text-align:right&quot;</span><span class="p">&gt;</span>$<span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">format_number</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">&#39;subtotal&#39;</span><span class="p">]);</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
615 <span class="p">&lt;/</span><span class="nt">tr</span><span class="p">&gt;</span>
616
617<span class="cp">&lt;?php</span> <span class="nv">$i</span><span class="o">++</span><span class="p">;</span> <span class="cp">?&gt;</span>
618
619<span class="cp">&lt;?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?&gt;</span>
620
621<span class="p">&lt;</span><span class="nt">tr</span><span class="p">&gt;</span>
622 <span class="p">&lt;</span><span class="nt">td</span> <span class="na">colspan</span><span class="o">=</span><span class="s">&quot;2&quot;</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
623 <span class="p">&lt;</span><span class="nt">td</span> <span class="na">class</span><span class="o">=</span><span class="s">&quot;right&quot;</span><span class="p">&gt;&lt;</span><span class="nt">strong</span><span class="p">&gt;</span>Total<span class="p">&lt;/</span><span class="nt">strong</span><span class="p">&gt;&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
624 <span class="p">&lt;</span><span class="nt">td</span> <span class="na">class</span><span class="o">=</span><span class="s">&quot;right&quot;</span><span class="p">&gt;</span>$<span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">format_number</span><span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">total</span><span class="p">());</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">td</span><span class="p">&gt;</span>
625<span class="p">&lt;/</span><span class="nt">tr</span><span class="p">&gt;</span>
626
627<span class="p">&lt;/</span><span class="nt">table</span><span class="p">&gt;</span>
628
629<span class="p">&lt;</span><span class="nt">p</span><span class="p">&gt;</span><span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nx">form_submit</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">,</span> <span class="s1">&#39;Update your Cart&#39;</span><span class="p">);</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">p</span><span class="p">&gt;</span>
630</pre></div>
631</div>
632</div>
633<div class="section" id="updating-the-cart">
634<h3><a class="toc-backref" href="#id6">Updating The Cart</a><a class="headerlink" href="#updating-the-cart" title="Permalink to this headline"></a></h3>
635<p>To update the information in your cart, you must pass an array
636containing the Row ID and one or more pre-defined properties to the
637<code class="docutils literal"><span class="pre">$this-&gt;cart-&gt;update()</span></code> method.</p>
638<div class="admonition note">
639<p class="first admonition-title">Note</p>
640<p class="last">If the quantity is set to zero, the item will be removed from
641the cart.</p>
642</div>
643<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
644 <span class="s1">&#39;rowid&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;b99ccdf16028f015540f341130b6d8ec&#39;</span><span class="p">,</span>
645 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">3</span>
646<span class="p">);</span>
647
648<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">update</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
649
650<span class="c1">// Or a multi-dimensional array</span>
651
652<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
653 <span class="k">array</span><span class="p">(</span>
654 <span class="s1">&#39;rowid&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;b99ccdf16028f015540f341130b6d8ec&#39;</span><span class="p">,</span>
655 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">3</span>
656 <span class="p">),</span>
657 <span class="k">array</span><span class="p">(</span>
658 <span class="s1">&#39;rowid&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;xw82g9q3r495893iajdh473990rikw23&#39;</span><span class="p">,</span>
659 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">4</span>
660 <span class="p">),</span>
661 <span class="k">array</span><span class="p">(</span>
662 <span class="s1">&#39;rowid&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;fh4kdkkkaoe30njgoe92rkdkkobec333&#39;</span><span class="p">,</span>
663 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">2</span>
664 <span class="p">)</span>
665<span class="p">);</span>
666
667<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">update</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
668</pre></div>
669</div>
670<p>You may also update any property you have previously defined when
671inserting the item such as options, price or other custom fields.</p>
672<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
673 <span class="s1">&#39;rowid&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;b99ccdf16028f015540f341130b6d8ec&#39;</span><span class="p">,</span>
674 <span class="s1">&#39;qty&#39;</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
675 <span class="s1">&#39;price&#39;</span> <span class="o">=&gt;</span> <span class="mf">49.95</span><span class="p">,</span>
676 <span class="s1">&#39;coupon&#39;</span> <span class="o">=&gt;</span> <span class="k">NULL</span>
677<span class="p">);</span>
678
679<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cart</span><span class="o">-&gt;</span><span class="na">update</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
680</pre></div>
681</div>
682<div class="section" id="what-is-a-row-id">
683<h4><a class="toc-backref" href="#id7">What is a Row ID?</a><a class="headerlink" href="#what-is-a-row-id" title="Permalink to this headline"></a></h4>
684<p>The row ID is a unique identifier that is generated by the cart code
685when an item is added to the cart. The reason a unique ID is created
686is so that identical products with different options can be managed
687by the cart.</p>
688<p>For example, let’s say someone buys two identical t-shirts (same product
689ID), but in different sizes. The product ID (and other attributes) will
690be identical for both sizes because it’s the same shirt. The only
691difference will be the size. The cart must therefore have a means of
692identifying this difference so that the two sizes of shirts can be
693managed independently. It does so by creating a unique “row ID” based on
694the product ID and any options associated with it.</p>
695<p>In nearly all cases, updating the cart will be something the user does
696via the “view cart” page, so as a developer, it is unlikely that you
697will ever have to concern yourself with the “row ID”, other than making
698sure your “view cart” page contains this information in a hidden form
699field, and making sure it gets passed to the <code class="docutils literal"><span class="pre">update()</span></code> method when
700the update form is submitted. Please examine the construction of the
701“view cart” page above for more information.</p>
702</div>
703</div>
704</div>
705<div class="section" id="class-reference">
706<h2><a class="toc-backref" href="#id8">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline"></a></h2>
707<dl class="class">
708<dt id="CI_Cart">
709<em class="property">class </em><code class="descname">CI_Cart</code><a class="headerlink" href="#CI_Cart" title="Permalink to this definition"></a></dt>
710<dd><dl class="attribute">
711<dt>
712<code class="descname">$product_id_rules = '.a-z0-9_-'</code></dt>
713<dd><p>These are the regular expression rules that we use to validate the product
714ID - alpha-numeric, dashes, underscores, or periods by default</p>
715</dd></dl>
716
717<dl class="attribute">
718<dt>
719<code class="descname">$product_name_rules = 'w -.:'</code></dt>
720<dd><p>These are the regular expression rules that we use to validate the product ID and product name - alpha-numeric, dashes, underscores, colons or periods by
721default</p>
722</dd></dl>
723
724<dl class="attribute">
725<dt>
726<code class="descname">$product_name_safe = TRUE</code></dt>
727<dd><p>Whether or not to only allow safe product names. Default TRUE.</p>
728</dd></dl>
729
730<dl class="method">
731<dt id="CI_Cart::insert">
732<code class="descname">insert</code><span class="sig-paren">(</span><span class="optional">[</span><em>$items = array()</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::insert" title="Permalink to this definition"></a></dt>
733<dd><table class="docutils field-list" frame="void" rules="none">
734<col class="field-name" />
735<col class="field-body" />
736<tbody valign="top">
737<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
738<li><strong>$items</strong> (<em>array</em>) – Items to insert into the cart</li>
739</ul>
740</td>
741</tr>
742<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
743</td>
744</tr>
745<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
746</td>
747</tr>
748</tbody>
749</table>
750<p>Insert items into the cart and save it to the session table. Returns TRUE
751on success and FALSE on failure.</p>
752</dd></dl>
753
754<dl class="method">
755<dt id="CI_Cart::update">
756<code class="descname">update</code><span class="sig-paren">(</span><span class="optional">[</span><em>$items = array()</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::update" title="Permalink to this definition"></a></dt>
757<dd><table class="docutils field-list" frame="void" rules="none">
758<col class="field-name" />
759<col class="field-body" />
760<tbody valign="top">
761<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
762<li><strong>$items</strong> (<em>array</em>) – Items to update in the cart</li>
763</ul>
764</td>
765</tr>
766<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
767</td>
768</tr>
769<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
770</td>
771</tr>
772</tbody>
773</table>
774<p>This method permits changing the properties of a given item.
775Typically it is called from the “view cart” page if a user makes changes
776to the quantity before checkout. That array must contain the rowid
777for each item.</p>
778</dd></dl>
779
780<dl class="method">
781<dt id="CI_Cart::remove">
782<code class="descname">remove</code><span class="sig-paren">(</span><em>$rowid</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::remove" title="Permalink to this definition"></a></dt>
783<dd><table class="docutils field-list" frame="void" rules="none">
784<col class="field-name" />
785<col class="field-body" />
786<tbody valign="top">
787<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
788<li><strong>$rowid</strong> (<em>int</em>) – ID of the item to remove from the cart</li>
789</ul>
790</td>
791</tr>
792<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
793</td>
794</tr>
795<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
796</td>
797</tr>
798</tbody>
799</table>
800<p>Allows you to remove an item from the shopping cart by passing it the
801<code class="docutils literal"><span class="pre">$rowid</span></code>.</p>
802</dd></dl>
803
804<dl class="method">
805<dt id="CI_Cart::total">
806<code class="descname">total</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::total" title="Permalink to this definition"></a></dt>
807<dd><table class="docutils field-list" frame="void" rules="none">
808<col class="field-name" />
809<col class="field-body" />
810<tbody valign="top">
811<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Total amount</td>
812</tr>
813<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td>
814</tr>
815</tbody>
816</table>
817<p>Displays the total amount in the cart.</p>
818</dd></dl>
819
820<dl class="method">
821<dt id="CI_Cart::total_items">
822<code class="descname">total_items</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::total_items" title="Permalink to this definition"></a></dt>
823<dd><table class="docutils field-list" frame="void" rules="none">
824<col class="field-name" />
825<col class="field-body" />
826<tbody valign="top">
827<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Total amount of items in the cart</td>
828</tr>
829<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td>
830</tr>
831</tbody>
832</table>
833<p>Displays the total number of items in the cart.</p>
834</dd></dl>
835
836<dl class="method">
837<dt id="CI_Cart::contents">
838<code class="descname">contents</code><span class="sig-paren">(</span><span class="optional">[</span><em>$newest_first = FALSE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::contents" title="Permalink to this definition"></a></dt>
839<dd><table class="docutils field-list" frame="void" rules="none">
840<col class="field-name" />
841<col class="field-body" />
842<tbody valign="top">
843<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
844<li><strong>$newest_first</strong> (<em>bool</em>) – Whether to order the array with newest items first</li>
845</ul>
846</td>
847</tr>
848<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">An array of cart contents</p>
849</td>
850</tr>
851<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
852</td>
853</tr>
854</tbody>
855</table>
856<p>Returns an array containing everything in the cart. You can sort the
857order by which the array is returned by passing it TRUE where the contents
858will be sorted from newest to oldest, otherwise it is sorted from oldest
859to newest.</p>
860</dd></dl>
861
862<dl class="method">
863<dt id="CI_Cart::get_item">
864<code class="descname">get_item</code><span class="sig-paren">(</span><em>$row_id</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::get_item" title="Permalink to this definition"></a></dt>
865<dd><table class="docutils field-list" frame="void" rules="none">
866<col class="field-name" />
867<col class="field-body" />
868<tbody valign="top">
869<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
870<li><strong>$row_id</strong> (<em>int</em>) – Row ID to retrieve</li>
871</ul>
872</td>
873</tr>
874<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of item data</p>
875</td>
876</tr>
877<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
878</td>
879</tr>
880</tbody>
881</table>
882<p>Returns an array containing data for the item matching the specified row
883ID, or FALSE if no such item exists.</p>
884</dd></dl>
885
886<dl class="method">
887<dt id="CI_Cart::has_options">
888<code class="descname">has_options</code><span class="sig-paren">(</span><em>$row_id = ''</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::has_options" title="Permalink to this definition"></a></dt>
889<dd><table class="docutils field-list" frame="void" rules="none">
890<col class="field-name" />
891<col class="field-body" />
892<tbody valign="top">
893<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
894<li><strong>$row_id</strong> (<em>int</em>) – Row ID to inspect</li>
895</ul>
896</td>
897</tr>
898<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE if options exist, FALSE otherwise</p>
899</td>
900</tr>
901<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
902</td>
903</tr>
904</tbody>
905</table>
906<p>Returns TRUE (boolean) if a particular row in the cart contains options.
907This method is designed to be used in a loop with <code class="docutils literal"><span class="pre">contents()</span></code>, since
908you must pass the rowid to this method, as shown in the Displaying
909the Cart example above.</p>
910</dd></dl>
911
912<dl class="method">
913<dt id="CI_Cart::product_options">
914<code class="descname">product_options</code><span class="sig-paren">(</span><span class="optional">[</span><em>$row_id = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::product_options" title="Permalink to this definition"></a></dt>
915<dd><table class="docutils field-list" frame="void" rules="none">
916<col class="field-name" />
917<col class="field-body" />
918<tbody valign="top">
919<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
920<li><strong>$row_id</strong> (<em>int</em>) – Row ID</li>
921</ul>
922</td>
923</tr>
924<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of product options</p>
925</td>
926</tr>
927<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
928</td>
929</tr>
930</tbody>
931</table>
932<p>Returns an array of options for a particular product. This method is
933designed to be used in a loop with <code class="docutils literal"><span class="pre">contents()</span></code>, since you
934must pass the rowid to this method, as shown in the Displaying the
935Cart example above.</p>
936</dd></dl>
937
938<dl class="method">
939<dt id="CI_Cart::destroy">
940<code class="descname">destroy</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::destroy" title="Permalink to this definition"></a></dt>
941<dd><table class="docutils field-list" frame="void" rules="none">
942<col class="field-name" />
943<col class="field-body" />
944<tbody valign="top">
945<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body">void</td>
946</tr>
947</tbody>
948</table>
949<p>Permits you to destroy the cart. This method will likely be called
950when you are finished processing the customer’s order.</p>
951</dd></dl>
952
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