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mysql_errno (PHP 3, PHP 4, PHP 5) mysql_errno -- Returns the numerical value of the error message from previous MySQL operation Descriptionint mysql_errno ( [resource link_identifier] )
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() was called
with no arguments. If by chance no connection is found or established, an
E_WARNING level warning 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 |
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mysql_drop_db
