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📄 reserved.variables.phperrormsg.html

📁 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
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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>The previous error message</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="reserved.variables.cookies.html">$_COOKIE</a></div> <div class="next" style="text-align: right; float: right;"><a href="reserved.variables.httprawpostdata.html">$HTTP_RAW_POST_DATA</a></div> <div class="up"><a href="reserved.variables.html">Predefined variables</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="reserved.variables.phperrormsg" class="refentry"> <div class="refnamediv">  <h1 class="refname">$php_errormsg</h1>  <p class="refpurpose"><span class="refname">$php_errormsg</span> &mdash; <span class="dc-title">The previous error message</span></p> </div>  <div class="refsect1 description">  <h3 class="title">Description</h3>  <p class="para">   <var class="varname">$php_errormsg</var> is a variable containing the   text of the last error message generated by PHP. This variable   will only be available within the scope in which the error   occurred, and only if the <a href="errorfunc.configuration.html#ini.track-errors" class="link">track_errors</a> configuration   option is turned on (it defaults to off).  </p>  <blockquote><p><b class="note">Note</b>:    <span class="simpara">    This variable is only available when <i>track_errors</i> is    enabled in <var class="filename">php.ini</var>.   </span>  </p></blockquote>  <div class="warning"><b class="warning">Warning</b>   <p class="simpara">    If a <a href="function.set-error-handler.html" class="link">user defined error handler</a>    is set <var class="varname">$php_erromsg</var> is only set if the error handler    returns <b><tt>FALSE</tt></b>   </p>  </div> </div>  <div class="refsect1 examples">  <h3 class="title">Examples</h3>  <p class="para">   <div class="example" id="variable.phperrormsg.basic" name="variable.phperrormsg.basic">    <p><b>Example #1 <var class="varname">$php_errormsg</var> example</b></p>    <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">@</span><span style="color: #0000BB">strpos</span><span style="color: #007700">();<br />echo&nbsp;</span><span style="color: #0000BB">$php_errormsg</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>    </div>    <div class="example-contents"><p>The above example will output something similar to:</p></div>    <div class="example-contents"><pre><div class="cdata"><pre>Wrong parameter count for strpos()</pre></div>    </pre></div>   </div>  </p> </div> </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="reserved.variables.cookies.html">$_COOKIE</a></div> <div class="next" style="text-align: right; float: right;"><a href="reserved.variables.httprawpostdata.html">$HTTP_RAW_POST_DATA</a></div> <div class="up"><a href="reserved.variables.html">Predefined variables</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>

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