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<?php $strings = array('SS2014', 'SU2014','FW2014','SS2013','SU2013','FW2013'); $results = array(); foreach($strings as $string){ $weight = 0; $weight_string = preg_replace("/[^0-9a-zA-Z]/", "", $string); var_dump($weight_string); $weight += ord(substr(strtolower($weight_string), 0)) * 1000; var_dump($substr(strtolower($weight_string), 0)); $weight += ord(substr(strtolower($weight_string), 1)) * 100; $weight += ord(substr(strtolower($weight_string), 2)) * 10; $weight += ord(substr(strtolower($weight_string), 3)); $results[] = $weight; } var_dump($results);
Output for git.master, git.master_jit, rfc.property-hooks
string(6) "SS2014" Warning: Undefined variable $substr in /in/vhlmM on line 10 Fatal error: Uncaught Error: Value of type null is not callable in /in/vhlmM:10 Stack trace: #0 {main} thrown in /in/vhlmM on line 10
Process exited with code 255.

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