$str = "PHP is a general purpose scripting language geared towards web development";
$length = 6;
$array = explode(" ", $str);
$words= array();
foreach ($array as $s) {
if (strlen($s) > $length) {
array_push($words, $s);
}
}
print_r($words);
/*
run:
Array
(
[0] => general
[1] => purpose
[2] => scripting
[3] => language
[4] => towards
[5] => development
)
*/