Online PHP editor | output for FVgRN

<?php $a = "Lorem IPSUM dolor sit amet, consectetur ipsum adipiscing elit."; $dolor = substr($a, 12, 5); echo "substr from position 15, 5 characters => ".$dolor."\n"; $elit = substr($a, -5, 4); echo "substr from position -5, 4 characters => ".$elit."\n"; // case sensitive $dolor_position = strpos($a, "dolor"); echo "strpos of dolor (case sensitive) => ".$dolor_position."\n"; // case insensitive $dolor_position_i = stripos($a, "dOLor"); echo "stripos of dOLlor (case insensitive) => ".$dolor_position_i."\n"; // case sensitive $new_a = str_replace("ipsum", "hello", $a); echo "str_replace ipsum (case sensitive) with hello => ".$new_a."\n"; // case insensitive $new_a = str_ireplace("ipsum", "hello", $a); echo "str_replace ipsum (case insensitive) with hello => ".$new_a."\n"; $len = strlen($a); echo "strlen (length) of a => ".$len."\n";