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. 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.
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