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run code in 300+ PHP versions simultaneously
<?php class S{static function __callStatic($k,$f){static $s;return $k=='get'?$s[$f[0]]:$s[$f[0]]=$f[1];}} $sumService = S::set('sum', function($a, $b) { return $a + $b; }); $sum = S::get('sum'); echo $sum(1, 2); echo S::get('sum')(1, 2); // Works only in PHP >= 7
Output for 7.0.0 - 7.0.20, 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 - 8.3.6
33
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '(', expecting ',' or ';' in /in/oiTKh on line 12
Process exited with code 255.

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