- print_r: documentation ( source)
- preg_match_all: documentation ( source)
<?php
$t = "asdahsf as hdash d jash {{1[a[é´t2384713829asdklkwr3 }} uasi oasfa awi 124u8127541233 a sdask lc {{213123}} n dashduq iwy4u1284612 372 sauios fjasld {{280318293}}-";
preg_match_all("~\{\{.*?\}\}~", $t, $v);
echo "<pre>";
print_r($v);