Answers for "how to empty the php array"

php array remove empty values

<?php
$arr = array('1', '', '2', '3', '0');
// Incorrect:
print_r(array_filter($arr));
// Correct:
print_r(array_filter($arr, 'strlen'));
//Custom
print_r(array_filter($arr, function ($val) {if ($val > 0) {return true;} else {return false;}}));

declare empty array in php

$emptyArray = []; 
$emptyArray = array();
$emptyArray = (array) null;