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  102. <li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
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  105. <li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
  106. <li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
  107. <li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
  108. <li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
  109. <li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
  110. <li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
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  113. <li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
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  116. <li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
  117. <li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
  118. <li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
  119. <li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
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  121. <li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
  122. <li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
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  124. <li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
  125. <li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
  126. </ul>
  127. </li>
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  129. <ul>
  130. <li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
  131. <li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
  132. <li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
  133. <li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
  134. <li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
  135. <li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
  136. <li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
  137. <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
  138. <li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
  139. <li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
  140. <li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
  141. <li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
  142. <li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
  143. <li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
  144. <li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
  145. </ul>
  146. </li>
  147. </ul>
  148. <ul class="current">
  149. <li class="toctree-l1 current"><a class="reference internal" href="index.html">Helpers</a><ul class="current">
  150. <li class="toctree-l2"><a class="reference internal" href="array_helper.html">Array Helper</a></li>
  151. <li class="toctree-l2 current"><a class="current reference internal" href="#">CAPTCHA Helper</a></li>
  152. <li class="toctree-l2"><a class="reference internal" href="cookie_helper.html">Cookie Helper</a></li>
  153. <li class="toctree-l2"><a class="reference internal" href="date_helper.html">Date Helper</a></li>
  154. <li class="toctree-l2"><a class="reference internal" href="directory_helper.html">Directory Helper</a></li>
  155. <li class="toctree-l2"><a class="reference internal" href="download_helper.html">Download Helper</a></li>
  156. <li class="toctree-l2"><a class="reference internal" href="email_helper.html">Email Helper</a></li>
  157. <li class="toctree-l2"><a class="reference internal" href="file_helper.html">File Helper</a></li>
  158. <li class="toctree-l2"><a class="reference internal" href="form_helper.html">Form Helper</a></li>
  159. <li class="toctree-l2"><a class="reference internal" href="html_helper.html">HTML Helper</a></li>
  160. <li class="toctree-l2"><a class="reference internal" href="inflector_helper.html">Inflector Helper</a></li>
  161. <li class="toctree-l2"><a class="reference internal" href="language_helper.html">Language Helper</a></li>
  162. <li class="toctree-l2"><a class="reference internal" href="number_helper.html">Number Helper</a></li>
  163. <li class="toctree-l2"><a class="reference internal" href="path_helper.html">Path Helper</a></li>
  164. <li class="toctree-l2"><a class="reference internal" href="security_helper.html">Security Helper</a></li>
  165. <li class="toctree-l2"><a class="reference internal" href="smiley_helper.html">Smiley Helper</a></li>
  166. <li class="toctree-l2"><a class="reference internal" href="string_helper.html">String Helper</a></li>
  167. <li class="toctree-l2"><a class="reference internal" href="text_helper.html">Text Helper</a></li>
  168. <li class="toctree-l2"><a class="reference internal" href="typography_helper.html">Typography Helper</a></li>
  169. <li class="toctree-l2"><a class="reference internal" href="url_helper.html">URL Helper</a></li>
  170. <li class="toctree-l2"><a class="reference internal" href="xml_helper.html">XML Helper</a></li>
  171. </ul>
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  307. <li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
  308. <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
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  315. <li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
  316. </ul>
  317. </li>
  318. </ul>
  319. <ul class="current">
  320. <li class="toctree-l1 current"><a class="reference internal" href="index.html">Helpers</a><ul class="current">
  321. <li class="toctree-l2"><a class="reference internal" href="array_helper.html">Array Helper</a></li>
  322. <li class="toctree-l2 current"><a class="current reference internal" href="#">CAPTCHA Helper</a></li>
  323. <li class="toctree-l2"><a class="reference internal" href="cookie_helper.html">Cookie Helper</a></li>
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  346. &nbsp;
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  349. <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
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  357. <li><a href="../index.html">Docs</a> &raquo;</li>
  358. <li><a href="index.html">Helpers</a> &raquo;</li>
  359. <li>CAPTCHA Helper</li>
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  361. </li>
  362. <div style="float:right;margin-left:5px;" id="closeMe">
  363. <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
  364. </div>
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  366. <hr/>
  367. </div>
  368. <div role="main" class="document">
  369. <div class="section" id="captcha-helper">
  370. <h1>CAPTCHA Helper<a class="headerlink" href="#captcha-helper" title="Permalink to this headline"></a></h1>
  371. <p>The CAPTCHA Helper file contains functions that assist in creating
  372. CAPTCHA images.</p>
  373. <div class="contents local topic" id="contents">
  374. <ul class="simple">
  375. <li><a class="reference internal" href="#loading-this-helper" id="id1">Loading this Helper</a></li>
  376. <li><a class="reference internal" href="#using-the-captcha-helper" id="id2">Using the CAPTCHA helper</a><ul>
  377. <li><a class="reference internal" href="#adding-a-database" id="id3">Adding a Database</a></li>
  378. </ul>
  379. </li>
  380. <li><a class="reference internal" href="#available-functions" id="id4">Available Functions</a></li>
  381. </ul>
  382. </div>
  383. <div class="custom-index container"></div><div class="section" id="loading-this-helper">
  384. <h2><a class="toc-backref" href="#id1">Loading this Helper</a><a class="headerlink" href="#loading-this-helper" title="Permalink to this headline"></a></h2>
  385. <p>This helper is loaded using the following code:</p>
  386. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">helper</span><span class="p">(</span><span class="s1">&#39;captcha&#39;</span><span class="p">);</span>
  387. </pre></div>
  388. </div>
  389. </div>
  390. <div class="section" id="using-the-captcha-helper">
  391. <h2><a class="toc-backref" href="#id2">Using the CAPTCHA helper</a><a class="headerlink" href="#using-the-captcha-helper" title="Permalink to this headline"></a></h2>
  392. <p>Once loaded you can generate a CAPTCHA like this:</p>
  393. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$vals</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
  394. <span class="s1">&#39;word&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;Random word&#39;</span><span class="p">,</span>
  395. <span class="s1">&#39;img_path&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;./captcha/&#39;</span><span class="p">,</span>
  396. <span class="s1">&#39;img_url&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;http://example.com/captcha/&#39;</span><span class="p">,</span>
  397. <span class="s1">&#39;font_path&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;./path/to/fonts/texb.ttf&#39;</span><span class="p">,</span>
  398. <span class="s1">&#39;img_width&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;150&#39;</span><span class="p">,</span>
  399. <span class="s1">&#39;img_height&#39;</span> <span class="o">=&gt;</span> <span class="mi">30</span><span class="p">,</span>
  400. <span class="s1">&#39;expiration&#39;</span> <span class="o">=&gt;</span> <span class="mi">7200</span><span class="p">,</span>
  401. <span class="s1">&#39;word_length&#39;</span> <span class="o">=&gt;</span> <span class="mi">8</span><span class="p">,</span>
  402. <span class="s1">&#39;font_size&#39;</span> <span class="o">=&gt;</span> <span class="mi">16</span><span class="p">,</span>
  403. <span class="s1">&#39;img_id&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;Imageid&#39;</span><span class="p">,</span>
  404. <span class="s1">&#39;pool&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ&#39;</span><span class="p">,</span>
  405. <span class="c1">// White background and border, black text and red grid</span>
  406. <span class="s1">&#39;colors&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span>
  407. <span class="s1">&#39;background&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="mi">255</span><span class="p">,</span> <span class="mi">255</span><span class="p">,</span> <span class="mi">255</span><span class="p">),</span>
  408. <span class="s1">&#39;border&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="mi">255</span><span class="p">,</span> <span class="mi">255</span><span class="p">,</span> <span class="mi">255</span><span class="p">),</span>
  409. <span class="s1">&#39;text&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">),</span>
  410. <span class="s1">&#39;grid&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="mi">255</span><span class="p">,</span> <span class="mi">40</span><span class="p">,</span> <span class="mi">40</span><span class="p">)</span>
  411. <span class="p">)</span>
  412. <span class="p">);</span>
  413. <span class="nv">$cap</span> <span class="o">=</span> <span class="nx">create_captcha</span><span class="p">(</span><span class="nv">$vals</span><span class="p">);</span>
  414. <span class="k">echo</span> <span class="nv">$cap</span><span class="p">[</span><span class="s1">&#39;image&#39;</span><span class="p">];</span>
  415. </pre></div>
  416. </div>
  417. <ul class="simple">
  418. <li>The captcha function requires the GD image library.</li>
  419. <li>Only the <strong>img_path</strong> and <strong>img_url</strong> are required.</li>
  420. <li>If a <strong>word</strong> is not supplied, the function will generate a random
  421. ASCII string. You might put together your own word library that you
  422. can draw randomly from.</li>
  423. <li>If you do not specify a path to a TRUE TYPE font, the native ugly GD
  424. font will be used.</li>
  425. <li>The captcha directory must be writable</li>
  426. <li>The <strong>expiration</strong> (in seconds) signifies how long an image will remain
  427. in the captcha folder before it will be deleted. The default is two
  428. hours.</li>
  429. <li><strong>word_length</strong> defaults to 8, <strong>pool</strong> defaults to 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</li>
  430. <li><strong>font_size</strong> defaults to 16, the native GD font has a size limit. Specify a true type font for bigger sizes.</li>
  431. <li>The <strong>img_id</strong> will be set as the id of the captcha image.</li>
  432. <li>If any of the <strong>colors</strong> values is missing, it will be replaced by the default.</li>
  433. </ul>
  434. <div class="section" id="adding-a-database">
  435. <h3><a class="toc-backref" href="#id3">Adding a Database</a><a class="headerlink" href="#adding-a-database" title="Permalink to this headline"></a></h3>
  436. <p>In order for the captcha function to prevent someone from submitting,
  437. you will need to add the information returned from <code class="docutils literal"><span class="pre">create_captcha()</span></code>
  438. to your database. Then, when the data from the form is submitted by
  439. the user you will need to verify that the data exists in the database
  440. and has not expired.</p>
  441. <p>Here is a table prototype:</p>
  442. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">CREATE</span> <span class="nx">TABLE</span> <span class="nx">captcha</span> <span class="p">(</span>
  443. <span class="nx">captcha_id</span> <span class="nx">bigint</span><span class="p">(</span><span class="mi">13</span><span class="p">)</span> <span class="nx">unsigned</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="nx">auto_increment</span><span class="p">,</span>
  444. <span class="nx">captcha_time</span> <span class="nx">int</span><span class="p">(</span><span class="mi">10</span><span class="p">)</span> <span class="nx">unsigned</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span>
  445. <span class="nx">ip_address</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">45</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span>
  446. <span class="nx">word</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">20</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span>
  447. <span class="nx">PRIMARY</span> <span class="nx">KEY</span> <span class="sb">`captcha_id`</span> <span class="p">(</span><span class="sb">`captcha_id`</span><span class="p">),</span>
  448. <span class="nx">KEY</span> <span class="sb">`word`</span> <span class="p">(</span><span class="sb">`word`</span><span class="p">)</span>
  449. <span class="p">);</span>
  450. </pre></div>
  451. </div>
  452. <p>Here is an example of usage with a database. On the page where the
  453. CAPTCHA will be shown youll have something like this:</p>
  454. <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">helper</span><span class="p">(</span><span class="s1">&#39;captcha&#39;</span><span class="p">);</span>
  455. <span class="nv">$vals</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
  456. <span class="s1">&#39;img_path&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;./captcha/&#39;</span><span class="p">,</span>
  457. <span class="s1">&#39;img_url&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;http://example.com/captcha/&#39;</span>
  458. <span class="p">);</span>
  459. <span class="nv">$cap</span> <span class="o">=</span> <span class="nx">create_captcha</span><span class="p">(</span><span class="nv">$vals</span><span class="p">);</span>
  460. <span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
  461. <span class="s1">&#39;captcha_time&#39;</span> <span class="o">=&gt;</span> <span class="nv">$cap</span><span class="p">[</span><span class="s1">&#39;time&#39;</span><span class="p">],</span>
  462. <span class="s1">&#39;ip_address&#39;</span> <span class="o">=&gt;</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">input</span><span class="o">-&gt;</span><span class="na">ip_address</span><span class="p">(),</span>
  463. <span class="s1">&#39;word&#39;</span> <span class="o">=&gt;</span> <span class="nv">$cap</span><span class="p">[</span><span class="s1">&#39;word&#39;</span><span class="p">]</span>
  464. <span class="p">);</span>
  465. <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">insert_string</span><span class="p">(</span><span class="s1">&#39;captcha&#39;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
  466. <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">query</span><span class="p">(</span><span class="nv">$query</span><span class="p">);</span>
  467. <span class="k">echo</span> <span class="s1">&#39;Submit the word you see below:&#39;</span><span class="p">;</span>
  468. <span class="k">echo</span> <span class="nv">$cap</span><span class="p">[</span><span class="s1">&#39;image&#39;</span><span class="p">];</span>
  469. <span class="k">echo</span> <span class="s1">&#39;&lt;input type=&quot;text&quot; name=&quot;captcha&quot; value=&quot;&quot; /&gt;&#39;</span><span class="p">;</span>
  470. </pre></div>
  471. </div>
  472. <p>Then, on the page that accepts the submission youll have something like
  473. this:</p>
  474. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// First, delete old captchas</span>
  475. <span class="nv">$expiration</span> <span class="o">=</span> <span class="nb">time</span><span class="p">()</span> <span class="o">-</span> <span class="mi">7200</span><span class="p">;</span> <span class="c1">// Two hour limit</span>
  476. <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">where</span><span class="p">(</span><span class="s1">&#39;captcha_time &lt; &#39;</span><span class="p">,</span> <span class="nv">$expiration</span><span class="p">)</span>
  477. <span class="o">-&gt;</span><span class="na">delete</span><span class="p">(</span><span class="s1">&#39;captcha&#39;</span><span class="p">);</span>
  478. <span class="c1">// Then see if a captcha exists:</span>
  479. <span class="nv">$sql</span> <span class="o">=</span> <span class="s1">&#39;SELECT COUNT(*) AS count FROM captcha WHERE word = ? AND ip_address = ? AND captcha_time &gt; ?&#39;</span><span class="p">;</span>
  480. <span class="nv">$binds</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="nv">$_POST</span><span class="p">[</span><span class="s1">&#39;captcha&#39;</span><span class="p">],</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">input</span><span class="o">-&gt;</span><span class="na">ip_address</span><span class="p">(),</span> <span class="nv">$expiration</span><span class="p">);</span>
  481. <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">query</span><span class="p">(</span><span class="nv">$sql</span><span class="p">,</span> <span class="nv">$binds</span><span class="p">);</span>
  482. <span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-&gt;</span><span class="na">row</span><span class="p">();</span>
  483. <span class="k">if</span> <span class="p">(</span><span class="nv">$row</span><span class="o">-&gt;</span><span class="na">count</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span>
  484. <span class="p">{</span>
  485. <span class="k">echo</span> <span class="s1">&#39;You must submit the word that appears in the image.&#39;</span><span class="p">;</span>
  486. <span class="p">}</span>
  487. </pre></div>
  488. </div>
  489. </div>
  490. </div>
  491. <div class="section" id="available-functions">
  492. <h2><a class="toc-backref" href="#id4">Available Functions</a><a class="headerlink" href="#available-functions" title="Permalink to this headline"></a></h2>
  493. <p>The following functions are available:</p>
  494. <dl class="function">
  495. <dt id="create_captcha">
  496. <code class="descname">create_captcha</code><span class="sig-paren">(</span><span class="optional">[</span><em>$data = ''</em><span class="optional">[</span>, <em>$img_path = ''</em><span class="optional">[</span>, <em>$img_url = ''</em><span class="optional">[</span>, <em>$font_path = ''</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#create_captcha" title="Permalink to this definition"></a></dt>
  497. <dd><table class="docutils field-list" frame="void" rules="none">
  498. <col class="field-name" />
  499. <col class="field-body" />
  500. <tbody valign="top">
  501. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
  502. <li><strong>$data</strong> (<em>array</em>) Array of data for the CAPTCHA</li>
  503. <li><strong>$img_path</strong> (<em>string</em>) Path to create the image in</li>
  504. <li><strong>$img_url</strong> (<em>string</em>) URL to the CAPTCHA image folder</li>
  505. <li><strong>$font_path</strong> (<em>string</em>) Server path to font</li>
  506. </ul>
  507. </td>
  508. </tr>
  509. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">array(word =&gt; $word, time =&gt; $now, image =&gt; $img)</p>
  510. </td>
  511. </tr>
  512. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
  513. </td>
  514. </tr>
  515. </tbody>
  516. </table>
  517. <p>Takes an array of information to generate the CAPTCHA as input and
  518. creates the image to your specifications, returning an array of
  519. associative data about the image.</p>
  520. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">array</span><span class="p">(</span>
  521. <span class="s1">&#39;image&#39;</span> <span class="o">=&gt;</span> <span class="nx">IMAGE</span> <span class="nx">TAG</span>
  522. <span class="s1">&#39;time&#39;</span> <span class="o">=&gt;</span> <span class="nx">TIMESTAMP</span> <span class="p">(</span><span class="nx">in</span> <span class="nb">microtime</span><span class="p">)</span>
  523. <span class="s1">&#39;word&#39;</span> <span class="o">=&gt;</span> <span class="nx">CAPTCHA</span> <span class="nx">WORD</span>
  524. <span class="p">)</span>
  525. </pre></div>
  526. </div>
  527. <p>The <strong>image</strong> is the actual image tag:</p>
  528. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;</span><span class="nx">img</span> <span class="nx">src</span><span class="o">=</span><span class="s2">&quot;http://example.com/captcha/12345.jpg&quot;</span> <span class="nx">width</span><span class="o">=</span><span class="s2">&quot;140&quot;</span> <span class="nx">height</span><span class="o">=</span><span class="s2">&quot;50&quot;</span> <span class="o">/&gt;</span>
  529. </pre></div>
  530. </div>
  531. <p>The <strong>time</strong> is the micro timestamp used as the image name without the
  532. file extension. It will be a number like this: 1139612155.3422</p>
  533. <p>The <strong>word</strong> is the word that appears in the captcha image, which if not
  534. supplied to the function, will be a random string.</p>
  535. </dd></dl>
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