<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Returns the numerical value of the error message from previous MySQL operation</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-drop-db.html">mysql_drop_db</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-error.html">mysql_error</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.mysql-errno" class="refentry"> <div class="refnamediv"> <h1 class="refname">mysql_errno</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_errno</span> — <span class="dc-title">Returns the numerical value of the error message from previous MySQL operation</span></p> </div> <div id="function.mysql-errno-refsynopsisdiv"> <div class="warning"><strong class="warning">Warning</strong> <p class="para">This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the <a href="book.mysqli.html" class="link">MySQLi</a> or <a href="ref.pdo-mysql.html" class="link">PDO_MySQL</a> extension should be used. See also <a href="mysqlinfo.api.choosing.html" class="link">MySQL: choosing an API</a> guide and <a href="faq.databases.html#faq.databases.mysql.deprecated" class="link">related FAQ</a> for more information. Alternatives to this function include:</p> <ul class="simplelist"> <li class="member"> <span class="function"><a href="mysqli.errno.html" class="function">mysqli_errno()</a></span></li> <li class="member"> <span class="methodname"><a href="pdo.errorcode.html" class="methodname">PDO::errorCode()</a></span></li> </ul> </div> </div> <div class="refsect1 description" id="refsect1-function.mysql-errno-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><strong>mysql_errno</strong></span> ([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code><span class="initializer"> = NULL</span></span> ] )</div> <p class="para rdfs-comment"> Returns the error number from the last MySQL function. </p> <p class="para"> Errors coming back from the MySQL database backend no longer issue warnings. Instead, use <span class="function"><strong>mysql_errno()</strong></span> to retrieve the error code. Note that this function only returns the error code from the most recently executed MySQL function (not including <span class="function"><a href="function.mysql-error.html" class="function">mysql_error()</a></span> and <span class="function"><strong>mysql_errno()</strong></span>), so if you want to use it, make sure you check the value before calling another MySQL function. </p> </div> <div class="refsect1 parameters" id="refsect1-function.mysql-errno-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter"> link_identifier</code></em></span><dd> <p class="para">The MySQL connection. If the link identifier is not specified, the last link opened by <span class="function"><a href="function.mysql-connect.html" class="function">mysql_connect()</a></span> is assumed. If no such link is found, it will try to create one as if <span class="function"><a href="function.mysql-connect.html" class="function">mysql_connect()</a></span> was called with no arguments. If no connection is found or established, an <strong><code>E_WARNING</code></strong> level error is generated.</p></dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.mysql-errno-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the error number from the last MySQL function, or <em>0</em> (zero) if no error occurred. </p> </div> <div class="refsect1 examples" id="refsect1-function.mysql-errno-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-1576"> <p><strong>Example #1 <span class="function"><strong>mysql_errno()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"mysql_user"</span><span style="color: #007700">, </span><span style="color: #DD0000">"mysql_password"</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">"nonexistentdb"</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #0000BB">mysql_errno</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">) . </span><span style="color: #DD0000">": " </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">). </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">"kossu"</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT * FROM nonexistenttable"</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #0000BB">mysql_errno</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">) . </span><span style="color: #DD0000">": " </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> 1049: Unknown database 'nonexistentdb' 1146: Table 'kossu.nonexistenttable' doesn't exist </pre></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-function.mysql-errno-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.mysql-error.html" class="function" rel="rdfs-seeAlso">mysql_error()</a> - Returns the text of the error message from previous MySQL operation</span></li> <li class="member"><a href="http://dev.mysql.com/doc/mysql/en/error-handling.html" class="link external">» MySQL error codes</a></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-drop-db.html">mysql_drop_db</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-error.html">mysql_error</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>