Online PHP editor | output for SSgOY

@ 2017-06-26T13:26:41Z

<?php

$trim = function($str) {
	return  preg_replace("~(?|\({2,}" . ($p = "(\(((?:[^()]*|(?1))*)\))") . "\){2,}|^(((\([^()]+\))+))$|$p)~", '$2', $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 - 7.1.25, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: 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))
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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