How to do repeated search & replacements:<?PHP// This is template_reader.php$var = "hello, world!";$marker = "<!--{{PLACEHOLDER}}-->";$str = file_get_contents("template.tpl");$str = str_replace($marker,"one...".$marker,$str);$str = str_replace($marker,"two...".$marker,$str);$str = str_replace($marker,"three...".$marker,$str);$str = str_replace($marker,$var,$str);echo $str;?>--- The template:<html><body><p><!--{{PLACEHOLDER}}--></p></body></html>--- This is the output:<html><body><p>one...two...three...hello, world!</p></body></html>