function.gd-info.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Retrieve information about the currently installed GD library</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.image.html">GD Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.getimagesize.html">getimagesize</a></div> <div class="up"><a href="ref.image.html">GD Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.gd-info" class="refentry"> <div class="refnamediv"> <h1 class="refname">gd_info</h1> <p class="verinfo">(PHP 4 >= 4.3.0, PHP 5)</p><p class="refpurpose"><span class="refname">gd_info</span> — <span class="dc-title">Retrieve information about the currently installed GD library</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>gd_info</b></b></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> Gets information about the version and capabilities of the installed GD library. </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an associative array. </p> <p class="para"> <table border="5"> <caption><b>Elements of array returned by <b>gd_info()</b></b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Attribute</th> <th colspan="1">Meaning</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">GD Version</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.string.html" class="type string">string</a> value describing the installed <i>libgd</i> version.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Freetype Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if Freetype Support is installed.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Freetype Linkage</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.string.html" class="type string">string</a> value describing the way in which Freetype was linked. Expected values are: 'with freetype', 'with TTF library', and 'with unknown library'. This element will only be defined if <i>Freetype Support</i> evaluated to <b><tt>TRUE</tt></b>.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">T1Lib Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if <i>T1Lib</i> support is included.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">GIF Read Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if support for <em class="emphasis">reading</em> <i>GIF</i> images is included.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">GIF Create Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if support for <em class="emphasis">creating</em> <i>GIF</i> images is included.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">JPG Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if <i>JPG</i> support is included.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PNG Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if <i>PNG</i> support is included.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">WBMP Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if <i>WBMP</i> support is included.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">XBM Support</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.boolean.html" class="type boolean">boolean</a> value. <b><tt>TRUE</tt></b> if <i>XBM</i> support is included.</td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Using <b>gd_info()</b></b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">gd_info</span><span style="color: #007700">());<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>array(9) { ["GD Version"]=> string(24) "bundled (2.0 compatible)" ["FreeType Support"]=> bool(false) ["T1Lib Support"]=> bool(false) ["GIF Read Support"]=> bool(true) ["GIF Create Support"]=> bool(false) ["JPG Support"]=> bool(false) ["PNG Support"]=> bool(true) ["WBMP Support"]=> bool(true) ["XBM Support"]=> bool(false)}</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.imagepng.html" class="function" rel="rdfs-seeAlso">imagepng()</a></li> <li class="member"><a href="function.imagejpeg.html" class="function" rel="rdfs-seeAlso">imagejpeg()</a></li> <li class="member"><a href="function.imagegif.html" class="function" rel="rdfs-seeAlso">imagegif()</a></li> <li class="member"><a href="function.imagewbmp.html" class="function" rel="rdfs-seeAlso">imagewbmp()</a></li> <li class="member"><a href="function.imagetypes.html" class="function" rel="rdfs-seeAlso">imagetypes()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.image.html">GD Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.getimagesize.html">getimagesize</a></div> <div class="up"><a href="ref.image.html">GD Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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