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| <div class="section" id="shopping-cart-class"> |
| <h1>Shopping Cart Class<a class="headerlink" href="#shopping-cart-class" title="Permalink to this headline">¶</a></h1> |
| <p>The Cart Class permits items to be added to a session that stays active |
| while a user is browsing your site. These items can be retrieved and |
| displayed in a standard “shopping cart” format, allowing the user to |
| update the quantity or remove items from the cart.</p> |
| <div class="admonition important"> |
| <p class="first admonition-title">Important</p> |
| <p class="last">The Cart library is DEPRECATED and should not be used. |
| It is currently only kept for backwards compatibility.</p> |
| </div> |
| <p>Please note that the Cart Class ONLY provides the core “cart” |
| functionality. It does not provide shipping, credit card authorization, |
| or other processing components.</p> |
| <div class="contents local topic" id="contents"> |
| <ul class="simple"> |
| <li><a class="reference internal" href="#using-the-cart-class" id="id1">Using the Cart Class</a><ul> |
| <li><a class="reference internal" href="#initializing-the-shopping-cart-class" id="id2">Initializing the Shopping Cart Class</a></li> |
| <li><a class="reference internal" href="#adding-an-item-to-the-cart" id="id3">Adding an Item to The Cart</a></li> |
| <li><a class="reference internal" href="#adding-multiple-items-to-the-cart" id="id4">Adding Multiple Items to The Cart</a></li> |
| <li><a class="reference internal" href="#displaying-the-cart" id="id5">Displaying the Cart</a></li> |
| <li><a class="reference internal" href="#updating-the-cart" id="id6">Updating The Cart</a><ul> |
| <li><a class="reference internal" href="#what-is-a-row-id" id="id7">What is a Row ID?</a></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li><a class="reference internal" href="#class-reference" id="id8">Class Reference</a></li> |
| </ul> |
| </div> |
| <div class="custom-index container"></div><div class="section" id="using-the-cart-class"> |
| <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> |
| <div class="section" id="initializing-the-shopping-cart-class"> |
| <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> |
| <div class="admonition important"> |
| <p class="first admonition-title">Important</p> |
| <p class="last">The Cart class utilizes CodeIgniter’s <a class="reference internal" href="sessions.html"><span class="doc">Session |
| Class</span></a> to save the cart information to a database, so |
| before using the Cart class you must set up a database table as |
| indicated in the <a class="reference internal" href="sessions.html"><span class="doc">Session Documentation</span></a>, and set the |
| session preferences in your application/config/config.php file to |
| utilize a database.</p> |
| </div> |
| <p>To initialize the Shopping Cart Class in your controller constructor, |
| use the <code class="docutils literal"><span class="pre">$this->load->library()</span></code> method:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'cart'</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>Once loaded, the Cart object will be available using:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">cart</span> |
| </pre></div> |
| </div> |
| <div class="admonition note"> |
| <p class="first admonition-title">Note</p> |
| <p class="last">The Cart Class will load and initialize the Session Class |
| automatically, so unless you are using sessions elsewhere in your |
| application, you do not need to load the Session class.</p> |
| </div> |
| </div> |
| <div class="section" id="adding-an-item-to-the-cart"> |
| <h3><a class="toc-backref" href="#id3">Adding an Item to The Cart</a><a class="headerlink" href="#adding-an-item-to-the-cart" title="Permalink to this headline">¶</a></h3> |
| <p>To add an item to the shopping cart, simply pass an array with the |
| product information to the <code class="docutils literal"><span class="pre">$this->cart->insert()</span></code> method, as shown |
| below:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'id'</span> <span class="o">=></span> <span class="s1">'sku_123ABC'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">1</span><span class="p">,</span> |
| <span class="s1">'price'</span> <span class="o">=></span> <span class="mf">39.95</span><span class="p">,</span> |
| <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'T-Shirt'</span><span class="p">,</span> |
| <span class="s1">'options'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span><span class="s1">'Size'</span> <span class="o">=></span> <span class="s1">'L'</span><span class="p">,</span> <span class="s1">'Color'</span> <span class="o">=></span> <span class="s1">'Red'</span><span class="p">)</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <div class="admonition important"> |
| <p class="first admonition-title">Important</p> |
| <p class="last">The first four array indexes above (id, qty, price, and |
| name) are <strong>required</strong>. If you omit any of them the data will not be |
| saved to the cart. The fifth index (options) is optional. It is intended |
| to be used in cases where your product has options associated with it. |
| Use an array for options, as shown above.</p> |
| </div> |
| <p>The five reserved indexes are:</p> |
| <ul class="simple"> |
| <li><strong>id</strong> - Each product in your store must have a unique identifier. |
| Typically this will be an “sku” or other such identifier.</li> |
| <li><strong>qty</strong> - The quantity being purchased.</li> |
| <li><strong>price</strong> - The price of the item.</li> |
| <li><strong>name</strong> - The name of the item.</li> |
| <li><strong>options</strong> - Any additional attributes that are needed to identify |
| the product. These must be passed via an array.</li> |
| </ul> |
| <p>In addition to the five indexes above, there are two reserved words: |
| rowid and subtotal. These are used internally by the Cart class, so |
| please do NOT use those words as index names when inserting data into |
| the cart.</p> |
| <p>Your array may contain additional data. Anything you include in your |
| array will be stored in the session. However, it is best to standardize |
| your data among all your products in order to make displaying the |
| information in a table easier.</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'id'</span> <span class="o">=></span> <span class="s1">'sku_123ABC'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">1</span><span class="p">,</span> |
| <span class="s1">'price'</span> <span class="o">=></span> <span class="mf">39.95</span><span class="p">,</span> |
| <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'T-Shirt'</span><span class="p">,</span> |
| <span class="s1">'coupon'</span> <span class="o">=></span> <span class="s1">'XMAS-50OFF'</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>The <code class="docutils literal"><span class="pre">insert()</span></code> method will return the $rowid if you successfully insert a |
| single item.</p> |
| </div> |
| <div class="section" id="adding-multiple-items-to-the-cart"> |
| <h3><a class="toc-backref" href="#id4">Adding Multiple Items to The Cart</a><a class="headerlink" href="#adding-multiple-items-to-the-cart" title="Permalink to this headline">¶</a></h3> |
| <p>By using a multi-dimensional array, as shown below, it is possible to |
| add multiple products to the cart in one action. This is useful in cases |
| where you wish to allow people to select from among several items on the |
| same page.</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> |
| <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'id'</span> <span class="o">=></span> <span class="s1">'sku_123ABC'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">1</span><span class="p">,</span> |
| <span class="s1">'price'</span> <span class="o">=></span> <span class="mf">39.95</span><span class="p">,</span> |
| <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'T-Shirt'</span><span class="p">,</span> |
| <span class="s1">'options'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span><span class="s1">'Size'</span> <span class="o">=></span> <span class="s1">'L'</span><span class="p">,</span> <span class="s1">'Color'</span> <span class="o">=></span> <span class="s1">'Red'</span><span class="p">)</span> |
| <span class="p">),</span> |
| <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'id'</span> <span class="o">=></span> <span class="s1">'sku_567ZYX'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">1</span><span class="p">,</span> |
| <span class="s1">'price'</span> <span class="o">=></span> <span class="mf">9.95</span><span class="p">,</span> |
| <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'Coffee Mug'</span> |
| <span class="p">),</span> |
| <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'id'</span> <span class="o">=></span> <span class="s1">'sku_965QRS'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">1</span><span class="p">,</span> |
| <span class="s1">'price'</span> <span class="o">=></span> <span class="mf">29.95</span><span class="p">,</span> |
| <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'Shot Glass'</span> |
| <span class="p">)</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="displaying-the-cart"> |
| <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> |
| <p>To display the cart you will create a <a class="reference internal" href="../general/views.html"><span class="doc">view |
| file</span></a> with code similar to the one shown below.</p> |
| <p>Please note that this example uses the <a class="reference internal" href="../helpers/form_helper.html"><span class="doc">form |
| helper</span></a>.</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nx">form_open</span><span class="p">(</span><span class="s1">'path/to/controller/update/method'</span><span class="p">);</span> <span class="cp">?></span> |
| |
| <span class="p"><</span><span class="nt">table</span> <span class="na">cellpadding</span><span class="o">=</span><span class="s">"6"</span> <span class="na">cellspacing</span><span class="o">=</span><span class="s">"1"</span> <span class="na">style</span><span class="o">=</span><span class="s">"width:100%"</span> <span class="na">border</span><span class="o">=</span><span class="s">"0"</span><span class="p">></span> |
| |
| <span class="p"><</span><span class="nt">tr</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">th</span><span class="p">></span>QTY<span class="p"></</span><span class="nt">th</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">th</span><span class="p">></span>Item Description<span class="p"></</span><span class="nt">th</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">th</span> <span class="na">style</span><span class="o">=</span><span class="s">"text-align:right"</span><span class="p">></span>Item Price<span class="p"></</span><span class="nt">th</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">th</span> <span class="na">style</span><span class="o">=</span><span class="s">"text-align:right"</span><span class="p">></span>Sub-Total<span class="p"></</span><span class="nt">th</span><span class="p">></span> |
| <span class="p"></</span><span class="nt">tr</span><span class="p">></span> |
| |
| <span class="cp"><?php</span> <span class="nv">$i</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span> <span class="cp">?></span> |
| |
| <span class="cp"><?php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">contents</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$items</span><span class="p">)</span><span class="o">:</span> <span class="cp">?></span> |
| |
| <span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">form_hidden</span><span class="p">(</span><span class="nv">$i</span><span class="o">.</span><span class="s1">'[rowid]'</span><span class="p">,</span> <span class="nv">$items</span><span class="p">[</span><span class="s1">'rowid'</span><span class="p">]);</span> <span class="cp">?></span> |
| |
| <span class="p"><</span><span class="nt">tr</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">form_input</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$i</span><span class="o">.</span><span class="s1">'[qty]'</span><span class="p">,</span> <span class="s1">'value'</span> <span class="o">=></span> <span class="nv">$items</span><span class="p">[</span><span class="s1">'qty'</span><span class="p">],</span> <span class="s1">'maxlength'</span> <span class="o">=></span> <span class="s1">'3'</span><span class="p">,</span> <span class="s1">'size'</span> <span class="o">=></span> <span class="s1">'5'</span><span class="p">));</span> <span class="cp">?></span><span class="p"></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span><span class="p">></span> |
| <span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$items</span><span class="p">[</span><span class="s1">'name'</span><span class="p">];</span> <span class="cp">?></span> |
| |
| <span class="cp"><?php</span> <span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">has_options</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">'rowid'</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">?></span> |
| |
| <span class="p"><</span><span class="nt">p</span><span class="p">></span> |
| <span class="cp"><?php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">product_options</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">'rowid'</span><span class="p">])</span> <span class="k">as</span> <span class="nv">$option_name</span> <span class="o">=></span> <span class="nv">$option_value</span><span class="p">)</span><span class="o">:</span> <span class="cp">?></span> |
| |
| <span class="p"><</span><span class="nt">strong</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$option_name</span><span class="p">;</span> <span class="cp">?></span>:<span class="p"></</span><span class="nt">strong</span><span class="p">></span> <span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$option_value</span><span class="p">;</span> <span class="cp">?></span><span class="p"><</span><span class="nt">br</span> <span class="p">/></span> |
| |
| <span class="cp"><?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?></span> |
| <span class="p"></</span><span class="nt">p</span><span class="p">></span> |
| |
| <span class="cp"><?php</span> <span class="k">endif</span><span class="p">;</span> <span class="cp">?></span> |
| |
| <span class="p"></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span> <span class="na">style</span><span class="o">=</span><span class="s">"text-align:right"</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">format_number</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">'price'</span><span class="p">]);</span> <span class="cp">?></span><span class="p"></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span> <span class="na">style</span><span class="o">=</span><span class="s">"text-align:right"</span><span class="p">></span>$<span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">format_number</span><span class="p">(</span><span class="nv">$items</span><span class="p">[</span><span class="s1">'subtotal'</span><span class="p">]);</span> <span class="cp">?></span><span class="p"></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"></</span><span class="nt">tr</span><span class="p">></span> |
| |
| <span class="cp"><?php</span> <span class="nv">$i</span><span class="o">++</span><span class="p">;</span> <span class="cp">?></span> |
| |
| <span class="cp"><?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?></span> |
| |
| <span class="p"><</span><span class="nt">tr</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span> <span class="na">colspan</span><span class="o">=</span><span class="s">"2"</span><span class="p">></span> <span class="p"></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span> <span class="na">class</span><span class="o">=</span><span class="s">"right"</span><span class="p">><</span><span class="nt">strong</span><span class="p">></span>Total<span class="p"></</span><span class="nt">strong</span><span class="p">></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"><</span><span class="nt">td</span> <span class="na">class</span><span class="o">=</span><span class="s">"right"</span><span class="p">></span>$<span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">format_number</span><span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">total</span><span class="p">());</span> <span class="cp">?></span><span class="p"></</span><span class="nt">td</span><span class="p">></span> |
| <span class="p"></</span><span class="nt">tr</span><span class="p">></span> |
| |
| <span class="p"></</span><span class="nt">table</span><span class="p">></span> |
| |
| <span class="p"><</span><span class="nt">p</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">form_submit</span><span class="p">(</span><span class="s1">''</span><span class="p">,</span> <span class="s1">'Update your Cart'</span><span class="p">);</span> <span class="cp">?></span><span class="p"></</span><span class="nt">p</span><span class="p">></span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="updating-the-cart"> |
| <h3><a class="toc-backref" href="#id6">Updating The Cart</a><a class="headerlink" href="#updating-the-cart" title="Permalink to this headline">¶</a></h3> |
| <p>To update the information in your cart, you must pass an array |
| containing the Row ID and one or more pre-defined properties to the |
| <code class="docutils literal"><span class="pre">$this->cart->update()</span></code> method.</p> |
| <div class="admonition note"> |
| <p class="first admonition-title">Note</p> |
| <p class="last">If the quantity is set to zero, the item will be removed from |
| the cart.</p> |
| </div> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'rowid'</span> <span class="o">=></span> <span class="s1">'b99ccdf16028f015540f341130b6d8ec'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">3</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span> |
| |
| <span class="c1">// Or a multi-dimensional array</span> |
| |
| <span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> |
| <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'rowid'</span> <span class="o">=></span> <span class="s1">'b99ccdf16028f015540f341130b6d8ec'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">3</span> |
| <span class="p">),</span> |
| <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'rowid'</span> <span class="o">=></span> <span class="s1">'xw82g9q3r495893iajdh473990rikw23'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">4</span> |
| <span class="p">),</span> |
| <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'rowid'</span> <span class="o">=></span> <span class="s1">'fh4kdkkkaoe30njgoe92rkdkkobec333'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">2</span> |
| <span class="p">)</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>You may also update any property you have previously defined when |
| inserting the item such as options, price or other custom fields.</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> |
| <span class="s1">'rowid'</span> <span class="o">=></span> <span class="s1">'b99ccdf16028f015540f341130b6d8ec'</span><span class="p">,</span> |
| <span class="s1">'qty'</span> <span class="o">=></span> <span class="mi">1</span><span class="p">,</span> |
| <span class="s1">'price'</span> <span class="o">=></span> <span class="mf">49.95</span><span class="p">,</span> |
| <span class="s1">'coupon'</span> <span class="o">=></span> <span class="k">NULL</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cart</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <div class="section" id="what-is-a-row-id"> |
| <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> |
| <p>The row ID is a unique identifier that is generated by the cart code |
| when an item is added to the cart. The reason a unique ID is created |
| is so that identical products with different options can be managed |
| by the cart.</p> |
| <p>For example, let’s say someone buys two identical t-shirts (same product |
| ID), but in different sizes. The product ID (and other attributes) will |
| be identical for both sizes because it’s the same shirt. The only |
| difference will be the size. The cart must therefore have a means of |
| identifying this difference so that the two sizes of shirts can be |
| managed independently. It does so by creating a unique “row ID” based on |
| the product ID and any options associated with it.</p> |
| <p>In nearly all cases, updating the cart will be something the user does |
| via the “view cart” page, so as a developer, it is unlikely that you |
| will ever have to concern yourself with the “row ID”, other than making |
| sure your “view cart” page contains this information in a hidden form |
| field, and making sure it gets passed to the <code class="docutils literal"><span class="pre">update()</span></code> method when |
| the update form is submitted. Please examine the construction of the |
| “view cart” page above for more information.</p> |
| </div> |
| </div> |
| </div> |
| <div class="section" id="class-reference"> |
| <h2><a class="toc-backref" href="#id8">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> |
| <dl class="class"> |
| <dt id="CI_Cart"> |
| <em class="property">class </em><code class="descname">CI_Cart</code><a class="headerlink" href="#CI_Cart" title="Permalink to this definition">¶</a></dt> |
| <dd><dl class="attribute"> |
| <dt> |
| <code class="descname">$product_id_rules = '.a-z0-9_-'</code></dt> |
| <dd><p>These are the regular expression rules that we use to validate the product |
| ID - alpha-numeric, dashes, underscores, or periods by default</p> |
| </dd></dl> |
| |
| <dl class="attribute"> |
| <dt> |
| <code class="descname">$product_name_rules = 'w -.:'</code></dt> |
| <dd><p>These are the regular expression rules that we use to validate the product ID and product name - alpha-numeric, dashes, underscores, colons or periods by |
| default</p> |
| </dd></dl> |
| |
| <dl class="attribute"> |
| <dt> |
| <code class="descname">$product_name_safe = TRUE</code></dt> |
| <dd><p>Whether or not to only allow safe product names. Default TRUE.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::insert"> |
| <code class="descname">insert</code><span class="sig-paren">(</span><span class="optional">[</span><em>$items = array()</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::insert" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$items</strong> (<em>array</em>) – Items to insert into the cart</li> |
| </ul> |
| </td> |
| </tr> |
| <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> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Insert items into the cart and save it to the session table. Returns TRUE |
| on success and FALSE on failure.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::update"> |
| <code class="descname">update</code><span class="sig-paren">(</span><span class="optional">[</span><em>$items = array()</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::update" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$items</strong> (<em>array</em>) – Items to update in the cart</li> |
| </ul> |
| </td> |
| </tr> |
| <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> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>This method permits changing the properties of a given item. |
| Typically it is called from the “view cart” page if a user makes changes |
| to the quantity before checkout. That array must contain the rowid |
| for each item.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::remove"> |
| <code class="descname">remove</code><span class="sig-paren">(</span><em>$rowid</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::remove" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$rowid</strong> (<em>int</em>) – ID of the item to remove from the cart</li> |
| </ul> |
| </td> |
| </tr> |
| <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> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Allows you to remove an item from the shopping cart by passing it the |
| <code class="docutils literal"><span class="pre">$rowid</span></code>.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::total"> |
| <code class="descname">total</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::total" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Total amount</td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Displays the total amount in the cart.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::total_items"> |
| <code class="descname">total_items</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::total_items" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Total amount of items in the cart</td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Displays the total number of items in the cart.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::contents"> |
| <code class="descname">contents</code><span class="sig-paren">(</span><span class="optional">[</span><em>$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> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$newest_first</strong> (<em>bool</em>) – Whether to order the array with newest items first</li> |
| </ul> |
| </td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">An array of cart contents</p> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Returns an array containing everything in the cart. You can sort the |
| order by which the array is returned by passing it TRUE where the contents |
| will be sorted from newest to oldest, otherwise it is sorted from oldest |
| to newest.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::get_item"> |
| <code class="descname">get_item</code><span class="sig-paren">(</span><em>$row_id</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::get_item" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$row_id</strong> (<em>int</em>) – Row ID to retrieve</li> |
| </ul> |
| </td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of item data</p> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Returns an array containing data for the item matching the specified row |
| ID, or FALSE if no such item exists.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::has_options"> |
| <code class="descname">has_options</code><span class="sig-paren">(</span><em>$row_id = ''</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cart::has_options" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$row_id</strong> (<em>int</em>) – Row ID to inspect</li> |
| </ul> |
| </td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE if options exist, FALSE otherwise</p> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Returns TRUE (boolean) if a particular row in the cart contains options. |
| This method is designed to be used in a loop with <code class="docutils literal"><span class="pre">contents()</span></code>, since |
| you must pass the rowid to this method, as shown in the Displaying |
| the Cart example above.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::product_options"> |
| <code class="descname">product_options</code><span class="sig-paren">(</span><span class="optional">[</span><em>$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> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> |
| <li><strong>$row_id</strong> (<em>int</em>) – Row ID</li> |
| </ul> |
| </td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of product options</p> |
| </td> |
| </tr> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Returns an array of options for a particular product. This method is |
| designed to be used in a loop with <code class="docutils literal"><span class="pre">contents()</span></code>, since you |
| must pass the rowid to this method, as shown in the Displaying the |
| Cart example above.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cart::destroy"> |
| <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> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body">void</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Permits you to destroy the cart. This method will likely be called |
| when you are finished processing the customer’s order.</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| </div> |
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| © Copyright 2014 - 2019, British Columbia Institute of Technology. |
| Last updated on Jan 16, 2019. |
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