📄 function.gzcompress.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>Compress a string</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.gzclose.html">gzclose</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.gzdecode.html">gzdecode</a></div> <div class="up"><a href="ref.zlib.html">Zlib Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.gzcompress" class="refentry"> <div class="refnamediv"> <h1 class="refname">gzcompress</h1> <p class="verinfo">(PHP 4 >= 4.0.1, PHP 5)</p><p class="refpurpose"><span class="refname">gzcompress</span> — <span class="dc-title">Compress a string</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>gzcompress</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$data</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$level</tt></span> ] )</div> <p class="para rdfs-comment"> This function compress the given string using the <i>ZLIB</i> data format. </p> <p class="para"> For details on the ZLIB compression algorithm see the document "<a href="http://www.faqs.org/rfcs/rfc1950" class="link external">» ZLIB Compressed Data Format Specification version 3.3</a>" (RFC 1950). </p> <blockquote><p><b class="note">Note</b>: This is <em class="emphasis">not</em> the same as gzip compression, which includes some header data. See <a href="function.gzencode.html" class="function">gzencode()</a> for gzip compression. <br /> </p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">data</tt></i></span> <dd> <p class="para"> The data to compress. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">level</tt></i></span> <dd> <p class="para"> The level of compression. Can be given as 0 for no compression up to 9 for maximum compression. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The compressed string or <b><tt>FALSE</tt></b> if an error occurred. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>gzcompress()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$compressed </span><span style="color: #007700">= </span><span style="color: #0000BB">gzcompress</span><span style="color: #007700">(</span><span style="color: #DD0000">'Compress me'</span><span style="color: #007700">, </span><span style="color: #0000BB">9</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$compressed</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></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.gzdeflate.html" class="function" rel="rdfs-seeAlso">gzdeflate()</a></li> <li class="member"><a href="function.gzinflate.html" class="function" rel="rdfs-seeAlso">gzinflate()</a></li> <li class="member"><a href="function.gzuncompress.html" class="function" rel="rdfs-seeAlso">gzuncompress()</a></li> <li class="member"><a href="function.gzencode.html" class="function" rel="rdfs-seeAlso">gzencode()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.gzclose.html">gzclose</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.gzdecode.html">gzdecode</a></div> <div class="up"><a href="ref.zlib.html">Zlib 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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