Snapshot showing use of array_map and foreach in a project that capitalizes strings.

array_map_version

<?php
/**
 * Loops array using array walk/ map
 */
class LoopMap extends  Loops {
    
    function __construct($array) {
        $this -> array = $array;
    }

    function capitalize_names(){
        return array_map(array($this,'_capitalize_name'),$this->array);
    }

}

foreach_ versoon

/**
 * Loops test array using the conventional for loop
 */
class LoopFor extends  Loops {
    function __construct($array) {
        $this -> array = $array;
    }
    
    function capitalize_names(){
       foreach ($this->array as &$name) {
           $name=$this->_capitalize_name($name);
       }
       return $this->array;
    }

}