PHP基于Redis消息队列实现发布微博的方法
121
2024-01-10
(PHP 5 >= 5.1.0)
pg_fetch_all_columns — Fetches all rows in a particular result column as an array
说明
array pg_fetch_all_columns ( resource$result
[, int $column = 0
] )
pg_fetch_all_columns() returns an array that contains all rows (records) in a particular column of the result resource.
Note: 此函数将 NULL 字段设置为 PHP NULL 值。
参数
result
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
column
Column number, zero-based, to be retrieved from the result resource. Defaults to the first column if not specified.
返回值
An array with all values in the result column.
FALSE is returned if column is larger than the number
of columns in the result, or on any other error.
范例
Example #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
pg_fetch_all() - 从结果中提取所有行作为一个数组
