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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PECL mysqlnd-uh >= 1.0.0-alpha)
MysqlndUhConnection::getErrorString — Returns a string description of the last error
$connection
)Returns a string description of the last error.
connection
Mysqlnd connection handle. Do not modify!
Error string for the most recent function call.
MysqlndUhConnection::getErrorString() is not only executed after the invocation of a user space API call which maps directly to it but also called internally.
Example #1 MysqlndUhConnection::getErrorString() example
<?php
class proxy extends MysqlndUhConnection {
public function getErrorString ( $res ) {
printf ( "%s(%s)\n" , __METHOD__ , var_export ( func_get_args (), true ));
$ret = parent :: getErrorString ( $res );
printf ( "%s returns %s\n" , __METHOD__ , var_export ( $ret , true ));
return $ret ;
}
}
mysqlnd_uh_set_connection_proxy (new proxy ());
printf ( "connect...\n" );
$mysqli = new mysqli ( "localhost" , "root" , "" , "test" );
printf ( "query...\n" );
$mysqli -> query ( "WILL_I_EVER_LEARN_SQL?" );
printf ( "errno...\n" );
var_dump ( $mysqli -> error );
printf ( "close...\n" );
$mysqli -> close ();
?>
以上例程会输出:
connect... proxy::getErrorString(array ( 0 => NULL, )) proxy::getErrorString returns '' query... errno... proxy::getErrorString(array ( 0 => NULL, )) proxy::getErrorString returns 'You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near \'WILL_I_EVER_LEARN_SQL?\' at line 1' string(168) "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WILL_I_EVER_LEARN_SQL?' at line 1" close...