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mysql_errno
(PHP 3, PHP 4)
Description
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.
瞰赽 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
蛁: 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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mysql_error