📄 function.socket-read.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Reads a maximum of length bytes from a socket</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.socket-listen.html">socket_listen</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.socket-recv.html">socket_recv</a></div> <div class="up"><a href="ref.sockets.html">Socket Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.socket-read" class="refentry"> <div class="refnamediv"> <h1 class="refname">socket_read</h1> <p class="verinfo">(PHP 4 >= 4.0.7, PHP 5)</p><p class="refpurpose"><span class="refname">socket_read</span> — <span class="dc-title">Reads a maximum of length bytes from a socket</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>socket_read</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$socket</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$length</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$type</tt></span> ] )</div> <p class="para rdfs-comment"> The function <b>socket_read()</b> reads from the socket resource <i><tt class="parameter">socket</tt></i> created by the <a href="function.socket-create.html" class="function">socket_create()</a> or <a href="function.socket-accept.html" class="function">socket_accept()</a> functions. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">socket</tt></i></span> <dd> <p class="para"> A valid socket resource created with <a href="function.socket-create.html" class="function">socket_create()</a> or <a href="function.socket-accept.html" class="function">socket_accept()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">length</tt></i></span> <dd> <p class="para"> The maximum number of bytes read is specified by the <i><tt class="parameter">length</tt></i> parameter. Otherwise you can use \r, \n, or \0 to end reading (depending on the <i><tt class="parameter">type</tt></i> parameter, see below). </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">type</tt></i></span> <dd> <p class="para"> Optional <i><tt class="parameter">type</tt></i> parameter is a named constant: <ul class="itemizedlist"> <li class="listitem"> <span class="simpara"> <b><tt>PHP_BINARY_READ</tt></b> (Default) - use the system <i>recv()</i> function. Safe for reading binary data. </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>PHP_NORMAL_READ</tt></b> - reading stops at \n or \r. </span> </li> </ul> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> <b>socket_read()</b> returns the data as a string on success, or <b><tt>FALSE</tt></b> on error (including if the remote host has closed the connection). The error code can be retrieved with <a href="function.socket-last-error.html" class="function">socket_last_error()</a>. This code may be passed to <a href="function.socket-strerror.html" class="function">socket_strerror()</a> to get a textual representation of the error. </p> <blockquote><p><b class="note">Note</b>: <b>socket_read()</b> returns a zero length string ("") when there is no more data to read. <br /> </p></blockquote> </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">4.1.0</td> <td colspan="1" rowspan="1" align="left"> The default value for <i><tt class="parameter">type</tt></i> was changed from <b><tt>PHP_NORMAL_READ</tt></b> to <b><tt>PHP_BINARY_READ</tt></b> </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.socket-accept.html" class="function" rel="rdfs-seeAlso">socket_accept()</a></li> <li class="member"><a href="function.socket-bind.html" class="function" rel="rdfs-seeAlso">socket_bind()</a></li> <li class="member"><a href="function.socket-connect.html" class="function" rel="rdfs-seeAlso">socket_connect()</a></li> <li class="member"><a href="function.socket-listen.html" class="function" rel="rdfs-seeAlso">socket_listen()</a></li> <li class="member"><a href="function.socket-last-error.html" class="function" rel="rdfs-seeAlso">socket_last_error()</a></li> <li class="member"><a href="function.socket-strerror.html" class="function" rel="rdfs-seeAlso">socket_strerror()</a></li> <li class="member"><a href="function.socket-write.html" class="function" rel="rdfs-seeAlso">socket_write()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.socket-listen.html">socket_listen</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.socket-recv.html">socket_recv</a></div> <div class="up"><a href="ref.sockets.html">Socket Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -