MysqlndUhConnection::getErrorString

(PECL mysqlnd-uh >= 1.0.0-alpha)

MysqlndUhConnection::getErrorString — Returns a string description of the last error

说明

public string MysqlndUhConnection::getErrorString ( mysqlnd_connection $connection )

Returns a string description of the last error.

参数

connection: Mysqlnd connection handle. Do not modify!

返回值

Error string for the most recent function call.

范例

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...

参见

mysqlnd_uh_set_connection_proxy() - Installs a proxy for mysqlnd connections
MysqlndUhConnection::getErrorNumber() - Returns the error code for the most recent function call
mysqli_error() - Returns a string description of the last error
mysql_error() - 返回上一个 MySQL 操作产生的文本错误信息