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run code in 150+ php & hhvm versions
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<?php $iter = 0; function weight($array) { global $iter = 0; $sum = array_sum($array); $rnd = mt_rand(0,$sum); foreach($array as $k=>$v) { $iter++; if($rnd <= $v) { return $k; } $rnd = $rnd - $v; } } $weights = [100, 200, 1000]; $values = array_fill(0, count($weights), 0); for ($x = 0; $x < 1000; $x++) { $w = weight($weights); $values[$w] = $values[$w] + 1; } echo "$iter iterations performed"; var_dump($values);
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.4.28
Parse error: syntax error, unexpected '=', expecting ',' or ';' in /in/237Ol on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '=', expecting ',' or ';' in /in/237Ol on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `','' or `';'' in /in/237Ol on line 5
Process exited with code 255.