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<?php echo preg_match('/.*?(?<columnname>`.+?`|\S+)\s*(?<operator>=|<|>|<>)\s*(?<value>`.+?`|\S+)/', 'algo = asslgo AND caca=8', $matches); var_dump($matches);
Output for 4.4.6 - 4.4.9, 5.2.2 - 7.1.0
1array(7) { [0]=> string(20) "algo = asslgo" ["columnname"]=> string(4) "algo" [1]=> string(4) "algo" ["operator"]=> string(1) "=" [2]=> string(1) "=" ["value"]=> string(6) "asslgo" [3]=> string(6) "asslgo" }
Output for 5.2.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 6 in /in/cQb4Z on line 7 NULL
Output for 4.3.11 - 4.4.5, 5.0.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 6 in /in/cQb4Z on line 7 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 6 in /in/cQb4Z on line 7 array(0) { }