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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>Output a PNG image to either the browser or a file</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="function.imagepalettecopy.html">imagepalettecopy</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagepolygon.html">imagepolygon</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.imagepng" class="refentry"> <div class="refnamediv">  <h1 class="refname">imagepng</h1>  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imagepng</span> &mdash; <span class="dc-title">Output a PNG image to either the browser or a file</span></p> </div> <div class="refsect1 description">  <h3 class="title">Description</h3>  <div class="methodsynopsis dc-description">   <span class="type">bool</span> <span class="methodname"><b><b>imagepng</b></b></span>    ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$image</tt></span>   [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$filename</tt></span>   [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$quality</tt></span>   [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$filters</tt></span>  ]]] )</div>  <p class="para rdfs-comment">   Outputs or saves a <acronym title="Portable Network Graphics">PNG</acronym> image from the given    <i><tt class="parameter">image</tt></i>.  </p> </div> <div class="refsect1 parameters">  <h3 class="title">Parameters</h3>  <p class="para">   <dl>    <dt><span class="term"><i><tt class="parameter">image</tt></i></span><dd><p class="para">An image resource, returned by one of the image creation functions, such as <a href="function.imagecreatetruecolor.html" class="function">imagecreatetruecolor()</a>.</p></dd></dt>    <dt>     <span class="term"><i><tt class="parameter">filename</tt></i></span>     <dd>      <p class="para">       The path to save the file to. If not set or <b><tt>NULL</tt></b>, the raw image stream       will be outputted directly.      </p>      <blockquote><p><b class="note">Note</b>:                <b><tt>NULL</tt></b> is invalid if the <i><tt class="parameter">quality</tt></i> and        <i><tt class="parameter">filters</tt></i> arguments are not used.       <br />      </p></blockquote>     </dd>    </dt>    <dt>     <span class="term"><i><tt class="parameter">quality</tt></i></span>     <dd>      <p class="para">       Compression level: from 0 (no compression) to 9.      </p>     </dd>    </dt>    <dt>     <span class="term"><i><tt class="parameter">filters</tt></i></span>     <dd>      <p class="para">       Allows reducing the PNG file size. It is a bitmask field which may be       set to any combination of the <i>PNG_FILTER_XXX</i>        constants. <b><tt>PNG_NO_FILTER</tt></b> or        <b><tt>PNG_ALL_FILTERS</tt></b> may also be used to respectively       disable or activate all filters.      </p>     </dd>    </dt>   </dl>  </p> </div> <div class="refsect1 returnvalues">  <h3 class="title">Return Values</h3>  <p class="para">   Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure.  </p> </div> <div class="refsect1 changelog">  <h3 class="title">ChangeLog</h3>  <p class="para">   <table class="informaltable">    <colgroup>     <thead valign="middle">      <tr valign="middle">       <th colspan="1">Version</th>       <th colspan="1">Description</th>      </tr>     </thead>     <tbody valign="middle" class="tbody">      <tr valign="middle">       <td colspan="1" rowspan="1" align="left">5.1.3</td>       <td colspan="1" rowspan="1" align="left">        Added the <i><tt class="parameter">filters</tt></i> parameter.       </td>      </tr>      <tr valign="middle">       <td colspan="1" rowspan="1" align="left">5.1.2</td>       <td colspan="1" rowspan="1" align="left">        Added the <i><tt class="parameter">quality</tt></i> parameter.       </td>      </tr>     </tbody>    </colgroup>   </table>  </p> </div> <div class="refsect1 examples">  <h3 class="title">Examples</h3>  <p class="para">   <div class="informalexample">    <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />$im&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">imagecreatefrompng</span><span style="color: #007700">(</span><span style="color: #DD0000">"test.png"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-type:&nbsp;image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>    </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.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.imagejpeg.html" class="function" rel="rdfs-seeAlso">imagejpeg()</a></li>    <li class="member"><a href="function.imagetypes.html" class="function" rel="rdfs-seeAlso">imagetypes()</a></li>    <li class="member"><a href="function.imagesavealpha.html" class="function" rel="rdfs-seeAlso">imagesavealpha()</a></li>   </ul>  </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagepalettecopy.html">imagepalettecopy</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagepolygon.html">imagepolygon</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>
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