PDO::pgsqlLOBUnlink

(PHP 5 >= 5.1.2, PECL pdo_pgsql:1.0.1-1.0.2)

PDO::pgsqlLOBUnlink — Deletes the large object

说明

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

如果成功则返回 TRUE，失败则返回 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()
PDO::pgsqlLOBCreate()


	PHP5中文手册 PostgreSQL (PDO) Printer PostgreSQL (PDO) PHP Manual PDO::pgsqlLOBUnlink (PHP 5 >= 5.1.2, PECL pdo_pgsql:1.0.1-1.0.2) PDO::pgsqlLOBUnlink — Deletes the large object 说明 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 返回值如果成功则返回 `TRUE`，失败则返回 `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() PDO::pgsqlLOBCreate() PostgreSQL (PDO) Printer PostgreSQL (PDO) PHP Manual