mysql_errno
(PHP 4, PHP 5)
mysql_errno — Returns the numerical value of the error message from previous MySQL operation
Warning
This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0.
Instead, the MySQLi or PDO_MySQL extension should be used.
See also MySQL: choosing an API guide.
Alternatives to this function include:
Description
function mysql_errno(
resource $link_identifier = NULL):
int
Returns the error number from the last MySQL function.
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.
Parameters
-
link_identifier The MySQL connection. If the
link identifier is not specified, the last link opened by
mysql_connect() is assumed. If no such link is found, it
will try to create one as if mysql_connect() had been called
with no arguments. If no connection is found or established, an
E_WARNING level error is generated.
Return Values
Returns the error number from the last MySQL function, or
0 (zero) if no error occurred.
Examples
Example #1 mysql_errno() example
<?php
$link = mysql_connect("localhost", "mysql_user", "mysql_password");
if (!mysql_select_db("nonexistentdb", $link)) {
echo mysql_errno($link) . ": " . mysql_error($link). "\n";
}
mysql_select_db("kossu", $link);
if (!mysql_query("SELECT * FROM nonexistenttable", $link)) {
echo mysql_errno($link) . ": " . mysql_error($link) . "\n";
}
?>
The above example will output
something similar to:
1049: Unknown database 'nonexistentdb'
1146: Table 'kossu.nonexistenttable' doesn't exist
mysql_drop_db
MySQL Functions