array_walk_recursive - Example

array_walk_recursive.php

<?php

$array = [
    'a' => [
        'z' => 'abcs ',
        'y' => ' xzsy ',
        'x' => 'abc xyz',
        'w' => [
            'elem1' => '  gasd fsdf ',
            'elem2' => 'ash fhakjs d '
        ]
    ],
    'b' => ' xyz ',
    'c' => 'pqr s t'
];


function trimArrayElements(&$item)
{
    $item = trim($item);
}

echo ("\n =============Un Trimmed Array ================\n");

var_dump($array);

array_walk_recursive($array, 'trimArrayElements');

echo ("\n ============= Trimmed Array ================\n");

var_dump($array);