php loop over a array return always first element

Question

easy question but i can't find a solution.

I have an array:

array
   0 => 
     array
       1 => string '25' (length=2)
   1 => 
     array
       1 => string '27' (length=2)

And i need to get:

    array
  0 => string '25' (length=2)
  1 => string '27' (length=2)

Yea if course i could do:

foreach($result as $each) {
    $resultIds[]=$each[1];
}

But i am pretty sure i saw this week somewhere a function for it something like...

array_something('current',$result);

What will loop over the array as foreach and return the first element so the result will be the same as the foreach solution. But i can't find it or remember it.

*What is the name of the function ? *

array_column() could be useful if you're on PHP >= 5.5.0... there is a userland version for earlier versions of PHP — Mark Baker
– Mark Baker, Commented Oct 5, 2013 at 8:56
You can find all the array_something functions here: php.net/manual/en/ref.array.php — Barmar
– Barmar, Commented Oct 5, 2013 at 8:59
@barmar before i posted question i read about every function there... — Lukas Lukac
– Lukas Lukac, Commented Oct 5, 2013 at 9:03

Community · Accepted Answer · 2020-06-20 09:12:55Z

2

You can use array_map or array_walk

example of array_map

<?php
function first($n)
{
    return $n[1];
}

$arr = array(
    array(1, 2, 4),
    array(1, 2, 3,),
);
var_export($arr);
// call internal function
$arr = array_map('current', $arr);
var_export($arr);

// call user function
$arr = array_map('first', $arr);

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 5, 2013 at 8:54

srain

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1 Comment

Lukas Lukac Over a year ago

Thx this is the line $arr = array_map('current', $arr); i was looking for.. but its weird i would swear i tried array_map('current', $arr) before i posted question... hm... the mornings... :D Thx srain!

Parixit · Accepted Answer · 2013-10-05 09:07:03Z

0

Please read manual here

$resultIds = array_map(function($arrEle) {
   return $arrEle[0];
}, $result);

array_map takes a function which gets passed each of the elements of the array in turn, it is called for each array element.

The function then needs to return whatever you want in the new array, in this case you are wanting the second element of the child array so we return $arrEle[1];

after the whole array has been iterated over it returns the new array.

edited Oct 5, 2013 at 9:07

Parixit

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answered Oct 5, 2013 at 9:01

Patrick Evans

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3 Comments

Lukas Lukac Over a year ago

Thx, but this is the same as foreach function too long i was looking for one line answer when i remember right what am i looking for.

Patrick Evans Over a year ago

@Trki you are probably thinking of array_column like Mark Baker mentions but you have to make sure the php version is 5.5 or greater or use the shim he links to.

Lukas Lukac Over a year ago

I am using 5.3 but thx for notice for array_column function. I marked already answer what i was looking for. Thx anyway to all.

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