<?php
$s = 'THERE IS CONTENT=%0 AND THERE IS CONTENT=%1';
$pattern = '/CONTENT=%0/';
$replacement = 'CONTENT=#2';
print $s;
?>
PD9waHAKJHMgPSAnVEhFUkUgSVMgQ09OVEVOVD0lMCBBTkQgVEhFUkUgSVMgQ09OVEVOVD0lMSc7CiRwYXR0ZXJuID0gJy9DT05URU5UPSUwLyc7CiRyZXBsYWNlbWVudCA9ICdDT05URU5UPSMyJzsKJHMgPSBwcmVnX3JlcGxhY2UoJHBhdHRlcm4sICRyZXBsYWNlbWVudCwgJHMpOwpwcmludCAkczsKPz4=