PDO::pgsqlLOBUnlink

(PHP 5 >= 5.1.2, PECL pdo_pgsql >= 1.0.2)

PDO::pgsqlLOBUnlink — Deletes the large object

说明

public bool PDO::pgsqlLOBUnlink ( string $oid )

Deletes a large object from the database identified by OID.

Note: This function must be called within a transaction.

参数

oid: A large object identifier

返回值

成功时返回 TRUE ，或者在失败时返回 FALSE 。

范例

Example #1 A PDO::pgsqlLOBUnlink() example

This example unlinks a large object from the database prior to deleting the row that references it from the blobs table we've been using in our PDO::pgsqlLOBCreate() and PDO::pgsqlLOBOpen() examples.

  <?php
$db  = new  PDO ( 'pgsql:dbname=test host=localhost' ,  $user ,  $pass );
 $db -> setAttribute ( PDO :: ATTR_ERRMODE ,  PDO :: ERRMODE_EXCEPTION );
 $db -> beginTransaction ();
 $db -> pgsqlLOBUnlink ( $oid );
 $stmt  =  $db -> prepare ( "DELETE FROM BLOBS where ident = ?" );
 $stmt -> execute (array( $some_id ));
 $db -> commit ();
 ?>

参见

PDO::pgsqlLOBOpen() - Opens an existing large object stream
PDO::pgsqlLOBCreate() - Creates a new large object

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