Hướng dẫn dùng interchange keys trong PHP

I have an array like

$a = array('1'=>'one','2'=>'two','3'=>'three');

I want to interchange key and value with each other using only for loop, and i want desired output like

$a = array('one'=>1,'two'=>2,'three'=>3); 

asked Oct 17, 2015 at 18:00

Use array_flip:

$a = array('one'=>1,'two'=>2,'three'=>3);
$a_flipped = array_flip($a);

If you insist on using a loop, then create a new empty array, iterate through the given array and fill the new array using values as keys, i.e.:

$a = array('one'=>1,'two'=>2,'three'=>3);
$a_flipped = array();
foreach ($a as $key => $value) {
    $a_flipped[$value] = $key;
}

answered Oct 17, 2015 at 18:02

Alex ShesterovAlex Shesterov

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2

using a foreach loop:

 'one','2'=>'two','3'=>'three');

    $tmp = array();

    foreach($a as $key=>$value){
        $tmp[$value] = $key;

    }

?>

answered Oct 17, 2015 at 18:17

2

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