Php Regex - How to pick if equals something - php

Question

class Something
{
public static function compile(&$subject, $replace, $with) {
$placeholders = array_combine($replace, $with);
$condition = '{[a-z0-9\_\- ]+:[a-z_]+}';
$inner = '((?:(?!{/?if).)*?)';
$pattern = '#{if\s?('.$condition.')}'.$inner.'{/if}#is';
while (preg_match($pattern, $subject, $match)) {
$placeholder = $match[1];
$content = $match[2];
// if empty value remove whole line
// else show line but remove pseudo-code
$subject = preg_replace($pattern,
empty($placeholders[$placeholder]) ? '' : addcslashes($content, '$'),
$subject,
1);
}
}
}
I have a html code area to play on. Dompdf handles the rest for converting my form to pdf. This class code was almost premade. It gives me freedom to use ;
{if {dil:value}} <div class="english">ENGLISH</div> {/if}
something like that in html area. But it was only checking if radio button is empty or not. But I want to learn which option is selected. So I want to use a code like ;
{if {dil:value}=='ENGLISH'} <div class="english">ENGLISH</div> {/if}
I converted empty check line with manual equality check to see if it works;
// if empty value remove whole line
// else show line but remove pseudo-code
$subject = preg_replace($pattern,
$placeholders[$placeholder]=='english' ? '' : addcslashes($content, '$'),
$subject,
1);
And it worked but without a freedom of course(only if radio equals to english). I'm so new to regex, so I couldn't figure it out. I tried to add $equality variable so I would use my code many times with different checks;
class Something
{
public static function compile(&$subject, $replace, $with) {
$placeholders = array_combine($replace, $with);
$condition = '{[a-z0-9\_\- ]+:[a-z_]+}';
$inner = '((?:(?!{/?if).)*?)';
$equality = '(?<=~)[^}]*(?=~)';
$pattern = '#{if\s?('.$condition.')'.$equality.'}'.$inner.'{/if}#is';
while (preg_match($pattern, $subject, $match)) {
$placeholder = $match[1];
$content = $match[2];
// if empty value remove whole line
// else show line but remove pseudo-code
$subject = preg_replace($pattern,
$placeholders[$placeholder]==$equality ? '' : addcslashes($content, '$'),
$subject,
1);
}
}
}
with this code on html area;
{if {dil:value}~'ENGLISH'~} <div class="english">ENGLISH</div> {/if}
I really believed that it would work, but it didn't :) Even pattern didn't get erase after converting to pdf so I can read my code under the pdf file.
I may be missing something about $match too. With equality variable included so $match might get third array I guess. So I also tried to add this but that didn't work too;
while (preg_match($pattern, $subject, $match)) {
$placeholder = $match[1];
$equality = $match[2];
$content = $match[3];
Well my goal is to put check icons on to specific box areas on premade designed form image. I handled all textboxes with absolute positions except getting which radio button is checked.
Thank you for all your help.

Answer 1

I solved it like this;
class Something
{
public static function compile(&$subject, $replace, $with) {
$placeholders = array_combine($replace, $with);
$condition = '{[a-z0-9\_\- ]+:[a-z_]+}';
$inner = '((?:(?!{\/?if).)*?)';
$equality = '(~[A-ZÇŞĞÜÖİçşğüöı]+~)';
$pattern = '#{if\s?('.$condition.')}'.$equality.''.$inner.'{\/if}#is';
while (preg_match($pattern, $subject, $match)) {
$placeholder = $match[1];
$equality = $match[2];
$content = $match[3];
$equality = substr($equality, 1, -1);
// if empty value remove whole line
// else show line but remove pseudo-code
$subject = preg_replace($pattern,
$placeholders[$placeholder] == $equality ? '' : addcslashes($content, '$'),
$subject,
1);
}
}
}
I changed my equality regex to support Utf-8 characters plus changed other regexes a bit. There were non excaped slashes. And finally I can use it at html like this;
{if {language:value}}~FRENCH~<div class="english">ENGLISH</div>{/if}
So first match gets radio button value, second match is my equality check, and third match is what will be written if equality is wrong. Yep I know it sounds a little bit reversed mode :) So it probably won't work with radio buttons which have more than 2 options. But in my situations my all radio buttons have 2 options.
So far so good, I kinda learnt regex today :)