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<?php $str = 'a,b\\,c\\\\,d'; preg_match_all('/(?:\\(?:\\.|$)|[^\\\\,])+/', $str, $matches); var_dump($matches[0]);
Output for git.master, git.master_jit
Warning: preg_match_all(): Compilation failed: unmatched closing parenthesis at offset 19 in /in/sSk6h on line 3 Warning: Trying to access array offset on value of type null in /in/sSk6h on line 4 NULL
Output for rfc.property-hooks
Warning: preg_match_all(): Compilation failed: unmatched closing parenthesis at offset 19 in /in/sSk6h on line 3 Warning: Trying to access array offset on null in /in/sSk6h on line 4 NULL

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