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| <td><h1>Code Igniter User Guide Version 1.4.0</h1></td> | |
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| URL Helper | |
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| <h1>URL Helper</h1> | |
| <p>The URL Helper file contains functions that assist in working with URLs.</p> | |
| <h2>Loading this Helper</h2> | |
| <p>This helper is loaded using the following code:</p> | |
| <code>$this->load->helper('url');</code> | |
| <p>The following functions are available:</p> | |
| <h2>site_url()</h2> | |
| <p>Returns your site URL, as specified in your config file. The index.php file (or whatever you have set as your | |
| site <dfn>index_page</dfn> in your config file) will be added to the URL, as will any URI segments you pass to the function.</p> | |
| <p>You are encouraged to use this function any time you need to generate a local URL so that your pages become more portable | |
| in the event your URL changes.</p> | |
| <p>Segments can be optionally passed to the function as a string or an array. Here is a string example:</p> | |
| <code>echo site_url("news/local/123");</code> | |
| <p>The above example would return something like: http://www.your-site.com/index.php/news/local/123</p> | |
| <p>Here is an example of segments passed as an array:</p> | |
| <code> | |
| $segments = array('news', 'local', '123');<br /> | |
| <br /> | |
| echo site_url($segments);</code> | |
| <h2>base_url()</h2> | |
| <p>Returns your site base URL, as specified in your config file. Example:</p> | |
| <code>echo base_url();</code> | |
| <h2>index_page()</h2> | |
| <p>Returns your site "index" page, as specified in your config file. Example:</p> | |
| <code>echo index_page();</code> | |
| <h2>anchor()</h2> | |
| <p>Creates a standard HTML anchor link based on your local site URL:</p> | |
| <code><a href="http://www.your-site.com">Click Here</a></code> | |
| <p>The tag has three optional parameters:</p> | |
| <code>anchor(<var>uri segments</var>, <var>text</var>, <var>attributes</var>)</code> | |
| <p>The first parameter can contain any segments you wish appended to the URL. As with the <dfn>site_url()</dfn> function above, | |
| segments can be a string or an array. Note: Do not include the base URL. It will be built as specified in your config file. Include | |
| only the URI segments you wish appended to the URL.</p> | |
| <p>The second segment is the text you would like the link to say. If you leave it blank, the URL will be used.</p> | |
| <p>The third parameter can contain a list of attributes you would like added to the link. The attributes can be a simple string or an associative array.</p> | |
| <p>Here are some examples:</p> | |
| <code>echo anchor(<var>news/local/123</var>, <var>My News</var>);</code> | |
| <p>Would produce: <a href="http://www.your-site.com/index.php/news/local/123" title="My News">My News</a></p> | |
| <code>echo anchor(<var>news/local/123</var>, <var>My News</var>, <var>array('title' => 'The best news!')</var>);</code> | |
| <p>Would produce: <a href="http://www.your-site.com/index.php/news/local/123" title="The best news!">My News</a></p> | |
| <h2>anchor_popup()</h2> | |
| <p>Nearly identical to the <dfn>anchor()</dfn> function except that it opens the URL in a new window. | |
| You can specify JavaScript window attributes in the third parameter to control how the window is opened. If | |
| the third parameter is not set it will simply open a new window with your own browser settings. Here is an example | |
| with attributes:</p> | |
| <code> | |
| $atts = array(<br /> | |
| 'width' => '800',<br /> | |
| 'height' => '600',<br /> | |
| 'scrollbars' => 'yes',<br /> | |
| 'status' => 'yes',<br /> | |
| 'resizable' => 'yes',<br /> | |
| 'screenx' => '0',<br /> | |
| 'screeny' => '0'<br /> | |
| );<br /> | |
| <br /> | |
| echo anchor_popup(news/local/123, 'Click Me!', $atts);</code> | |
| <p>Note: The above attributes are the function defaults so you only need to set the ones that are different from what you need. | |
| If you want the function to use all of its defaults simply pass an empty array in the third parameter:</p> | |
| <code>echo anchor_popup(news/local/123, 'Click Me!', array());</code> | |
| <h2>mailto()</h2> | |
| <p>Creates a standard HTML email link. Usage example:</p> | |
| <code>echo mailto('me@my-site.com', 'Click Here to Contact Me');</code> | |
| <p>As with the <dfn>anchor()</dfn> tab above, you can set attributes using the third parameter.</p> | |
| <h2>safe_mailto()</h2> | |
| <p>Identical to the above function except it writes an obfuscated version of the mailto tag using ordinal numbers | |
| written with JavaScript to help prevent the email address from being harvested by spam bots.</p> | |
| <h2>auto_link()</h2> | |
| <p>Automatically turns URLs and email addresses contained in a string into links. Example:</p> | |
| <code>$string = auto_link($string);</code> | |
| <p>The second parameter determines whether URLs and emails are converted or just one or the other. Default behavior is both | |
| if the parameter is not specified</p> | |
| <p>Converts only URLs:</p> | |
| <code>$string = auto_link($string, 'url');</code> | |
| <p>Converts only Email addresses:</p> | |
| <code>$string = auto_link($string, 'email');</code> | |
| </p>The third parameter determines whether links are shown in a new window. The value can be TRUE or FALSE (boolean):</p> | |
| <code>$string = auto_link($string, 'both', TRUE);</code> | |
| <h2>url_title()</h2> | |
| <p>Takes a string as input and creates a human-friendly URL string. This is useful if, for example, you have a blog | |
| in which you'd like to use the title of your entries in the URL. Example:</p> | |
| <code>$title = "What's wrong with CSS?";<br /> | |
| <br /> | |
| $url_title = url_title($title);<br /> | |
| <br /> | |
| // Produces: whats-wrong-with-css | |
| </code> | |
| <p>The second parameter determines the word delimiter. By default dashes are used. Options are: <dfn>dash</dfn>, or <dfn>underscore</dfn>:</p> | |
| <code>$title = "What's wrong with CSS?";<br /> | |
| <br /> | |
| $url_title = url_title($title, 'underscore');<br /> | |
| <br /> | |
| // Produces: whats_wrong_with_css | |
| </code> | |
| <h3>prep_url()</h3> | |
| <p>This function will add <kbd>http://</kbd> in the event it is missing from a URL. Pass the URL string to the function like this:</p> | |
| <code> | |
| $url = "www.some-site.com";<br /><br /> | |
| $url = prep_url($url);</code> | |
| <h2>redirect()</h2> | |
| <p>Does a "header redirect" to the local URI specified. Just like other functions in this helper, this one is designed | |
| to redirect to a local URL within your site. You will <strong>not</strong> specify the full site URL, but rather simply the URI segments | |
| to the controller you want to direct to. The function will build the URL based on your config file values.</p> | |
| <p>The second parameter allows you to choose between the "location" | |
| method or the "refresh" method. Location is faster, but on Windows servers it can sometimes be a problem. Example:</p> | |
| <code>if ($logged_in == FALSE)<br /> | |
| {<br /> | |
| redirect('/login/form/', 'refresh');<br /> | |
| }</code> | |
| <p class="important"><strong>Note:</strong> In order for this function to work it must be used before anything is outputted | |
| to the browser since it utilizes server headers.</p> | |
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