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(PECL mongo >=0.9.5)
MongoDB::lastError — Check if there was an error on the most recent db operation performed
This method is equivalent to:
<?php
public function lastError () {
return $this -> command (array( 'getlasterror' => 1 ));
}
?>
此函数没有参数。
Returns the error, if there was one.
Example #1 MongoDB::lastError() NULL
error example
<?php
$db -> resetError ();
var_dump ( $db -> lastError ());
?>
以上例程的输出类似于:
array(3) { ["err"]=> NULL ["n"]=> int(0) ["ok"]=> float(1) }
Example #2 MongoDB::lastError() duplicate key example
<?php
$c = $db -> selectCollection ( "foo" );
// insert two documents with the same _id
$c -> insert (array( "_id" => 1 ));
$c -> insert (array( "_id" => 1 ));
var_dump ( $db -> lastError ());
?>
以上例程的输出类似于:
array(3) { ["err"]=> string(64) "E11000 duplicate key errorindex: foo.foo.$_id_ dup key: { : 1 }" ["n"]=> int(0) ["ok"]=> float(1) }