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  • 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 or PGSQL_DML_STRING combined. If PGSQL_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";

    上篇:pg_dbname()

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