Simple key search in php array

Question

I have a simple multidimensional array, like so:

$arr1 = array(3,5,array(4,"foo", array("bar","qux"=>"id")));

Then the recursive function,

function getVal($arr){
    foreach($arr as $key=>$val){
      if($key=="qux"){
        echo $val."<br>";
      }elseif(is_array($val)){
        getVal($val);
      }
    }
}

Then finally, calling the function for the first time

getVal($arr1);

However, it outputs

3
4
bar
id

As opposed to only "id". Where did I go wrong?

Try $key === "qux"

hjpotter92
– hjpotter92

2015-11-25 19:23:16 +00:00
Commented Nov 25, 2015 at 19:23 — hjpotter92
– hjpotter92, Commented Nov 25, 2015 at 19:23

Marc B · Accepted Answer · 2015-11-25 19:23:24Z

3

Some of your keys are numbers, which means you're doing 0 == 'qux', which in PHP-land evaluates to true (qux gets converted to integer 0, and obviously 0==0 is true). You need to use ===, which compares value AND type.

answered Nov 25, 2015 at 19:23

Marc B

362k44 gold badges433 silver badges508 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Rijumone Over a year ago

Thanks a ton! Thanks for the explanation! Have to wait 9 minutes to accept the answer though.

Manikiran · Accepted Answer · 2015-11-25 19:24:44Z

0

Try this:

<?php
$arr1 = array(3,5,array(4,"foo", array("bar","qux"=>"id")));
function getVal($arr){
    foreach($arr as $key=>$val){
      if($key==="qux"){
        echo $val."<br>";
      }elseif(is_array($val)){
        getVal($val);
      }
    }
}
getVal($arr1);
?>

answered Nov 25, 2015 at 19:24

Manikiran

2,6451 gold badge27 silver badges40 bronze badges

2 Comments

Rijumone Over a year ago

Thanks Manikiran. I'll select @Marc B's answer though because of the explaination.

Manikiran Over a year ago

No worries, I am still a beginner trying to improve my skills.

Collectives™ on Stack Overflow

Simple key search in php array

2 Answers 2

1 Comment

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related