function.bzread.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>Binary safe bzip2 file read</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.bzopen.html">bzopen</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.bzwrite.html">bzwrite</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.bzread" class="refentry"> <div class="refnamediv"> <h1 class="refname">bzread</h1> <p class="verinfo">(PHP 4 >= 4.3.3, PHP 5, PECL bz2:1.0)</p><p class="refpurpose"><span class="refname">bzread</span> — <span class="dc-title">Binary safe bzip2 file read</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>bzread</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$bz</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$length</tt></span> ] )</div> <p class="para rdfs-comment"> <b>bzread()</b> reads from the given bzip2 file pointer. </p> <p class="para"> Reading stops when <i><tt class="parameter">length</tt></i> (uncompressed) bytes have been read or EOF is reached, whichever comes first. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">bz</tt></i></span> <dd> <p class="para"> The file pointer. It must be valid and must point to a file successfully opened by <a href="function.bzopen.html" class="function">bzopen()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">length</tt></i></span> <dd> <p class="para"> If not specified, <b>bzread()</b> will read 1024 (uncompressed) bytes at a time. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the uncompressed data, or <b><tt>FALSE</tt></b> on error. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>bzread()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">"/tmp/foo.bz2"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$bz </span><span style="color: #007700">= </span><span style="color: #0000BB">bzopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">, </span><span style="color: #DD0000">"r"</span><span style="color: #007700">) or die(</span><span style="color: #DD0000">"Couldn't open $file"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$decompressed_file </span><span style="color: #007700">= </span><span style="color: #DD0000">''</span><span style="color: #007700">;<br />while (!</span><span style="color: #0000BB">feof</span><span style="color: #007700">(</span><span style="color: #0000BB">$bz</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">$decompressed_file </span><span style="color: #007700">.= </span><span style="color: #0000BB">bzread</span><span style="color: #007700">(</span><span style="color: #0000BB">$bz</span><span style="color: #007700">, </span><span style="color: #0000BB">4096</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">bzclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$bz</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"The contents of $file are: <br />\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">$decompressed_file</span><span style="color: #007700">;<br /><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.bzwrite.html" class="function" rel="rdfs-seeAlso">bzwrite()</a></li> <li class="member"><a href="function.feof.html" class="function" rel="rdfs-seeAlso">feof()</a></li> <li class="member"><a href="function.bzopen.html" class="function" rel="rdfs-seeAlso">bzopen()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.bzopen.html">bzopen</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.bzwrite.html">bzwrite</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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