goldvision.com - PHP / mysql

Description

int mysql_errno ( [resource link_identifier])

Returns the error number from the last MySQL function, or 0 (zero) if no error occurred.

Errors coming back from the MySQL database backend no longer issue warnings. Instead, use mysql_errno() to retrieve the error code. Note that this function only returns the error code from the most recently executed MySQL function (not including mysql_error() and mysql_errno()), so if you want to use it, make sure you check the value before calling another mySQL function.

<?php
    mysql_connect("kossu");
    echo mysql_errno().": ".mysql_error()."<br />";
    mysql_select_db("nonexistentdb");
    echo mysql_errno().": ".mysql_error()."<br />";
    $conn = mysql_query("SELECT * FROM nonexistenttable");
    echo mysql_errno().": ".mysql_error()."<br />";
?>