选择语言 :

Core_Arr::extract

Retrieves multiple keys from an array. If the key does not exist in the array, the default value will be added instead.

// Get the values "username", "password" from $_POST
$auth = Arr::extract($_POST, array('username', 'password'));

array Core_Arr::extract( array $array , array $keys [, mixed $default = null ] )

参数列表

参数类型描述默认值

$array array Array to extract keys from

$keys array List of key names

$default mixed Default value null

参数	类型	描述	默认值
`$array`	`array`	Array to extract keys from
`$keys`	`array`	List of key names
`$default`	`mixed`	Default value	null

返回值

array

File: ./core/classes/arr.class.php

public static function extract($array, array $keys, $default = null)
{
	$found = array();
	foreach ($keys as $key)
	{
		$found[$key] = isset($array[$key]) ? $array[$key] : $default;
	}

	return $found;
}