php clear array of empty values code example

Example 1: 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;}}));

Example 2: clear array php

//To clear array you are able to simply re-instantiate it
$foo = array();

//To clear $foo from the symbol table use
unset($foo);