Online PHP editor | output for tcrHK

<?php $str="a b c d e f g h i j "; $pattern=array(); $pattern[0]="/\ba\b/"; $pattern[1]="/\bb\b/"; $pattern[2]="/\bc\b/"; $pattern[3]="/\bd\b/"; $pattern[4]="/\be\b/"; $pattern[5]="/\bf\b/"; $pattern[6]="/\bg\b/"; $pattern[7]="/\bh\b/"; $pattern[8]="/\bi\b/"; $pattern[9]="/\bj\b/"; $replacement=array(); $replacement[0]="6a"; $replacement[1]="6e"; $replacement[2]="6i"; $replacement[3]="6o"; $replacement[4]="6u"; $replacement[5]="5a"; $replacement[6]="5e"; $replacement[7]="5i"; $replacement[8]="5o"; $replacement[9]="5u"; echo preg_replace($pattern,$replacement,$str);