Syntax:array array_filter ( array $input [, callable $callback = “” ] )Description:Filters elements of an array using a callback function<?php $entry = array( 0 => 'foo', 1 => false, 2 => -1, 3 => null, 4 => '' ); print_r(array_filter($entry)); ?>OUTPUTArray ( [0] => foo [2] => -1 )... Read More »