pg_fetch_all_columns

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

pg_fetch_all_columns — Fetches all rows in a particular result column as an array

说明

pg_fetch_all_columns(PgSql\Result $result, int $field = 0): array

pg_fetch_all_columns() returns an array that contains all rows (records) in a particular column of the PgSql\Result instance.

注意: 此函数将 NULL 字段设置为 PHP null 值。

参数

result

An PgSql\Result instance, returned by pg_query(), pg_query_params() or pg_execute()(among others).

field

Column number. Defaults to the first column if not specified.

返回值

An array with all values in the result column.

更新日志

版本 说明
8.1.0 The result parameter expects an PgSql\Result instance now; previously, a 资源(resource) was expected.

范例

示例 #1 pg_fetch_all_columns() example

<?php 
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
  echo "An error occurred.\n";
  exit;
}

$result = pg_query($conn, "SELECT title, name, address FROM authors");
if (!$result) {
  echo "An error occurred.\n";
  exit;
}

// Get an array of all author names
$arr = pg_fetch_all_columns($result, 1);

var_dump($arr);

?>

参见