Online PHP editor | output for TWdeB

@ 2017-06-26T14:34:25Z

<?php

$trim = function($str) {
	return preg_replace('~\(+(\(((?:[^()]*|(?1))*)\))\)+|(\((?:[^()]*|\g{-1})*\))~', '$2$3', $str);
};

echo $trim('((((A))))'), "\n";
echo $trim('(((((B+C)*A)*(F))))'), "\n";
echo $trim('(A+B)(B+C)'), "\n";
echo $trim('(((((B+C)*A))))'), "\n";
echo str_repeat('-',15), PHP_EOL;
echo $trim('((A+B)+C)'), "\n";
echo $trim('(((A+B))+C)'), "\n";
echo $trim('((((A+B))+C))'), "\n";
echo $trim('(A+(B+C))'), "\n";
echo $trim('(A+((B+C)))'), "\n";

Output for 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: A ((B+C)*A)*(F) (A+B)(B+C) (B+C)*A --------------- ((A+B)+C) A+B+C) A+B+C)) (A+(B+C)) (A+B+C
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 A ((B+C)*A)*(F) (A+B)(B+C) (B+C)*A --------------- ((A+B)+C) A+B+C) A+B+C)) (A+(B+C)) (A+B+C

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