preg_match not between specific tags

Question

i have template engine. when matching {if}...{/if} block, content splitting by {else|elif} condition.

But when content have nested {if}...{/if} block, {else|elif} condition algorithm matching wrong else or elif tags.

maybe i have a content like this;

example content

black line should selectable but red line unselectable.

this is my old matching pattern but it's not working properly

/{(else|elif)[\s]*(.*?)[\s]*}/

Answer 1

preg_match_all("/\{\/if}(.*?)\{if \$test3 \}/ms", $input_lines, $output_array);
Echo $output_array[1];

See it in action http://www.phpliveregex.com/p/fhf

(You need to push the preg_match_all-button for it to work)