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.
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 would produce the following output:
1049: Unknown database 'nonexistentdb'
1146: Table 'kossu.nonexistenttable' doesn't exist |
|
Note:
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() and
MySQL error codes.
