$re = '/\| *\{\{cal\|([a-z]*)\}\}.*\{\{dm\|([a-z 0-9|]*)\}\} *\|\|(.*) *, *(.*) *, *(.*) *\{\{SmallFlag\|(.*)\}\}/i';
$str = '\\| {{cal|social}} || {{dm|mar 1}} || Description with Wiki or HTML Link, TOWN, COUNTRY {{SmallFlag|flag}}
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php