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mysql_errno

(PHP 3, PHP 4 )

mysql_errno --  Returns the numerical value of the error message from previous MySQL operation

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.

Пример 1. mysql_errno() example

<?php
    mysql_connect("localhost", "mysql_user", "mysql_password");

    mysql_select_db("nonexistentdb");
    echo mysql_errno() . ": " . mysql_error(). "\n";

    mysql_select_db("kossu");
    mysql_query("SELECT * FROM nonexistenttable");
    echo mysql_errno() . ": " . mysql_error() . "\n";
?>

The above example would produce the following output: 

1049: Unknown database 'nonexistentdb'
1146: Table 'kossu.nonexistenttable' doesn't exist

Замечание: If the optional argument is specified the given link is used to retrieve the error code. If not, the last opened link is used.

See also: mysql_error()

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