merge 2 array as column

helper.php

<?php

$column1 = array(1,2,3,4);
$column2 = array('test','test','test','test');
$table = array();

//Example 1
/*foreach($column1 as $key => $row){
	$table[] = array($column1[$key],$column2[$key]);
}*/

//or
//Example 2
$table = array_map(function($a,$b){
	// return array($a,$b); //merge column as array
	return "$a,$b"; //merge column as string
},$column1,$column2);

var_dump($table);