- var_dump: documentation ( source)
- strtr: documentation ( source)
<?php
$t = <<<EOT
<a class="a{{ number }} t h clickable {{ free }} {{ selected }}"
data-info="{{ free }}"
data-type="{{ type }}"
title="{{ type }}"
data-id={{ number }}">{{ number }}</a>
EOT;
var_dump(strtr($t, array(
'{{number}}' => 54,
'{{free}}' => 'free',
'{{selected}}' => 'cur',
)));