pg_delete()
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
删除记录
说明
pg_delete(resource $connection,string $table_name,array $assoc_array[,int $options= PGSQL_DML_EXEC]): mixed
pg_delete()删除符合条件的记录,条件在assoc_array中以field=>value格式给出。如果指定了option,则pg_convert()按照该选项作用于assoc_array之上。
参数
- $connection
PostgreSQL database connection resource.
- $table_name
Name of the table from which to delete rows.
- $assoc_array
An array whose keys are field names in the table$table_name, and whose values are the values of those fields that are to be deleted.
- $options
Any number of
PGSQL_CONV_FORCE_NULL
,PGSQL_DML_NO_CONV
,PGSQL_DML_EXEC
orPGSQL_DML_STRING
combined. IfPGSQL_DML_STRING
is part of the$optionsthen query string is returned.
返回值
成功时返回TRUE
,或者在失败时返回FALSE
。 Returns string if PGSQL_DML_STRING
is passed via$options.
范例
Example #1 pg_delete()例子
<?php $db = pg_connect('dbname=foo'); // This is safe, since $_POST is converted automatically $res = pg_delete($db, 'post_log', $_POST); if ($res) { echo "POST data is deleted: $res\n"; } else { echo "User must have sent wrong inputs\n"; } ?>
Warning此函数是实验性的。此函数的表象,包括名称及其相关文档都可能在未来的PHP 发布版本中未通知就被修改。使用本函数风险自担。
参见
pg_convert()
将关联的数组值转换为适合 SQL 语句的格式。
One should take care when checking the return value. 0 == false which is not equal with failed delete. if(!$res) echo "Nothing was deleted";