pg_delete

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

pg_delete — 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 options then 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

示例 #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";
  }
?>

警告

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。

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User Contributed Notes 1 note

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Anonymous ¶

18 years ago


One should take care when checking the return value. 
0 == false which is not equal with failed delete. 

if(!$res)
  echo "Nothing was deleted";

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