📄 function.bzcompress.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 into bzip2 encoded data</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.bzclose.html">bzclose</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.bzdecompress.html">bzdecompress</a></div> <div class="up"><a href="ref.bzip2.html">Bzip2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.bzcompress" class="refentry"> <div class="refnamediv"> <h1 class="refname">bzcompress</h1> <p class="verinfo">(PHP 4 >= 4.3.3, PHP 5, PECL bz2:1.0)</p><p class="refpurpose"><span class="refname">bzcompress</span> — <span class="dc-title">Compress a string into bzip2 encoded data</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><b><b>bzcompress</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$source</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$blocksize</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$workfactor</tt></span> ]] )</div> <p class="para rdfs-comment"> <b>bzcompress()</b> compresses the given string and returns it as bzip2 encoded data. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">source</tt></i></span> <dd> <p class="para"> The string to compress. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">blocksize</tt></i></span> <dd> <p class="para"> Specifies the blocksize used during compression and should be a number from 1 to 9 with 9 giving the best compression, but using more resources to do so. <i><tt class="parameter">blocksize</tt></i> defaults to 4. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">workfactor</tt></i></span> <dd> <p class="para"> Controls how the compression phase behaves when presented with worst case, highly repetitive, input data. The value can be between 0 and 250 with 0 being a special case and 30 being the default value. </p> <p class="para"> Regardless of the <i><tt class="parameter">workfactor</tt></i>, the generated output is the same. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The compressed string or number of error in case of error. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <div class="example"> <p><b>Example #1 Compressing data</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"sample data"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$bzstr </span><span style="color: #007700">= </span><span style="color: #0000BB">bzcompress</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">9</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$bzstr</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.bzdecompress.html" class="function" rel="rdfs-seeAlso">bzdecompress()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.bzclose.html">bzclose</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.bzdecompress.html">bzdecompress</a></div> <div class="up"><a href="ref.bzip2.html">Bzip2 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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