array_map and append string to elements of array

Question

I have an array like this:

$a = array('aa','bb','cc','dd');

I want to add 'rq' string at the begging of all the elements of array. Is it possible to do it with calling array_map() on this array?

deceze · Accepted Answer · 2012-01-14 08:55:52Z

up vote 4 down vote accepted

$a = array_map(function ($str) { return "rq$str"; }, $a);

answered Jan 14 '12 at 8:55

deceze
152k11119235

Hamed Momeni · Answer 2 · 2012-01-14 08:57:35Z

up vote 2 down vote

You can have it like this:

<?php
$a = array('aa','bb','cc','dd');
$i=0;
foreach($a as $d){
    $a[$i] = 'rq'.$d;
    $i++;
}
var_dump($a);
?>

edited Jan 14 '12 at 8:57

answered Jan 14 '12 at 8:51

Hamed Momeni
916420

scessor · Answer 3 · 2012-01-14 08:59:12Z

up vote 2 down vote

function addRq($sValue) {
    return 'rq'.$sValue;
}
$newA = array_map("addRq", $a);

Also see this example.

edited Jan 14 '12 at 8:59

answered Jan 14 '12 at 8:54

scessor
10.2k21024

3 Answers