XPath กับ CakePHP

น่าดีใจสำหรับผู้ใช้ CakePHP ซึ่งตอนนี้มีคำสั่งที่ช่วยให้ใช้ XPath กับ Array ได้
โดยไม่ต้องง้อ PHP Standard Function เลย อิๆ

<?php
 Configure::write('debug',1);

$a=array(
 array('User'=>array('id'=>1,'name'=>'somchai','salary'=>100)),
 array('User'=>array('id'=>2,'name'=>'somsri','salary'=>300)),
 array('User'=>array('id'=>3,'name'=>'doraemon','salary'=>250)),
 array('User'=>array('id'=>4,'name'=>'nobita','salary'=>150)),
 array('User'=>array('id'=>5,'name'=>'suneo','salary'=>250)),
);

$b=Set::extract($a,'/User/id'); pr($b);
/*
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 4
)
*/

$b=Set::extract($a,'/User[id=3]'); pr($b);
/*
Array
(
    [0] => Array
        (
            [User] => Array
                (
                    [id] => 3
                    [name] => doraemon
                    [salary] => 250
                )
        )
)
*/
$b=Set::extract($a,'/User/.[id=3]'); pr($b);
/*
Array
(
    [0] => Array
        (
            [id] => 3
            [name] => doraemon
            [salary] => 250
        )
)
*/

$b=Set::extract($a,'/User[id>3]'); pr($b);
/*
Array
(
    [0] => Array
        (
            [User] => Array
                (
                    [id] => 4
                    [name] => nobita
                    [salary] => 150
                )
        )
    [1] => Array
        (
            [User] => Array
                (
                    [id] => 5
                    [name] => suneo
                    [salary] => 250
                )
        )
)
*/

$b=Set::extract($a,'/User[id>3]/name'); pr($b);
/*
Array
(
    [0] => nobita
    [1] => suneo
)
*/
$b=Set::extract($a,'/User[:last]'); pr($b);
/*
Array
(
    [0] => Array
        (
            [User] => Array
                (
                    [id] => 5
                    [name] => suneo
                    [salary] => 250
                )
        )
)
*/

?>