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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>Returns the error code from last connect call</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="mysqli.commit.html">mysqli::commit</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysqli.connect-error.html">mysqli->connect_error</a></div> <div class="up"><a href="class.mysqli.html">MySQLi</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="mysqli.connect-errno" class="refentry"> <div class="refnamediv"> <h1 class="refname">mysqli->connect_errno</h1> <h1 class="refname">mysqli_connect_errno</h1> <p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">mysqli->connect_errno</span> -- <span class="refname">mysqli_connect_errno</span> — <span class="dc-title">Returns the error code from last connect call</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="classsynopsis"> <div class="ooclass"><a href="class.mysqli.html" class="classname">mysqli</a></div> <div class="fieldsynopsis"><span class="type">string</span> <var class="varname">$connect_errno</var>;</div> </div> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>mysqli_connect_errno</b></b></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> Returns the last error code number from the last call to <a href="mysqli.connect.html" class="function">mysqli_connect()</a>. </p> <blockquote><p><b class="note">Note</b>: Client error message numbers are listed in the MySQL <var class="filename">errmsg.h</var> header file, server error message numbers are listed in <var class="filename">mysqld_error.h</var>. In the MySQL source distribution you can find a complete list of error messages and error numbers in the file <var class="filename">Docs/mysqld_error.txt</var>. <br /> </p></blockquote> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> An error code value for the last call to <a href="mysqli.connect.html" class="function">mysqli_connect()</a>, if it failed. zero means no error occurred. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>mysqli_connect_errno()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$link </span><span style="color: #007700">= @</span><span style="color: #0000BB">mysqli_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"nonexisting_user"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Can't connect to localhost. Errorcode: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_connect_errno</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="mysqli.connect.html" class="function" rel="rdfs-seeAlso">mysqli_connect()</a></li> <li class="member"><a href="mysqli.connect-error.html" class="function" rel="rdfs-seeAlso">mysqli_connect_error()</a></li> <li class="member"><a href="mysqli.errno.html" class="function" rel="rdfs-seeAlso">mysqli_errno()</a></li> <li class="member"><a href="mysqli.error.html" class="function" rel="rdfs-seeAlso">mysqli_error()</a></li> <li class="member"><a href="mysqli.sqlstate.html" class="function" rel="rdfs-seeAlso">mysqli_sqlstate()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysqli.commit.html">mysqli::commit</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysqli.connect-error.html">mysqli->connect_error</a></div> <div class="up"><a href="class.mysqli.html">MySQLi</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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