Answers for "how can i split a multi dimesional array to single array php"

convert multidimensional array into single dimension php

$arrayMult = [ ['a','b'] , ['c', 'd'] ];
$arraySingle = call_user_func_array('array_merge', $arrayMult);
// $arraySingle is now = ['a','b', 'c', 'd'];

php split array in half

$alphabet = array("a", "b", "c", "d", "e","f");

$firsthalf = array_slice($alphabet, 0, count($alphabet) / 2);
$secondhalf = array_slice($alphabet, count($alphabet) / 2);