function.exit.html
来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 149 行
HTML
149 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Output a message and terminate the current script</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.eval.html">eval</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.get-browser.html">get_browser</a></div> <div class="up"><a href="ref.misc.html">Misc. Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.exit" class="refentry"> <div class="refnamediv"> <h1 class="refname">exit</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">exit</span> — <span class="dc-title">Output a message and terminate the current script</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><span class="type void">void</span></span> <span class="methodname"><b><b>exit</b></b></span> ([ <span class="methodparam"><span class="type">string</span> <tt class="parameter">$status</tt></span> ] )</div> <div class="methodsynopsis dc-description"> <span class="type"><span class="type void">void</span></span> <span class="methodname"><b><b>exit</b></b></span> ( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$status</tt></span> )</div> <p class="para rdfs-comment"> Terminates execution of the script. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">status</tt></i></span> <dd> <p class="para"> If <i><tt class="parameter">status</tt></i> is a string, this function prints the <i><tt class="parameter">status</tt></i> just before exiting. </p> <p class="para"> If <i><tt class="parameter">status</tt></i> is an <a href="language.types.integer.html" class="type integer">integer</a>, that value will also be used as the exit status. Exit statuses should be in the range 0 to 254, the exit status 255 is reserved by PHP and shall not be used. The status 0 is used to terminate the program successfully. </p> <blockquote><p><b class="note">Note</b>: <span class="simpara"> PHP >= 4.2.0 does NOT print the <i><tt class="parameter">status</tt></i> if it is an <a href="language.types.integer.html" class="type integer">integer</a>. </span> </p></blockquote> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> No value is returned. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>exit()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$filename </span><span style="color: #007700">= </span><span style="color: #DD0000">'/path/to/data-file'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$file </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #DD0000">'r'</span><span style="color: #007700">)<br /> or exit(</span><span style="color: #DD0000">"unable to open file ($filename)"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> <p class="para"> <div class="example"> <p><b>Example #2 <b>exit()</b> status example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br /></span><span style="color: #FF8000">//exit program normally<br /></span><span style="color: #007700">exit;<br />exit();<br />exit(</span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//exit with an error code<br /></span><span style="color: #007700">exit(</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br />exit(</span><span style="color: #0000BB">0376</span><span style="color: #007700">); </span><span style="color: #FF8000">//octal<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: <span class="simpara">Because this is a language construct and not a function, it cannot be called using <a href="functions.variable-functions.html" class="link">variable functions</a></span></p></blockquote> <blockquote><p><b class="note">Note</b>: This language construct is equivalent to <a href="function.die.html" class="function">die()</a>. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.register-shutdown-function.html" class="function" rel="rdfs-seeAlso">register_shutdown_function()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.eval.html">eval</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.get-browser.html">get_browser</a></div> <div class="up"><a href="ref.misc.html">Misc. 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
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?