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

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{
    $found = array();
    foreach ($keys as $key)
    {
        $found[$key] = isset($array[$key]) ? $array[$key] : $default;
    }
 
    return $found;
}