PHP隨機字串產生函數

function random_string($length, $max=FALSE) { if (is_int($max) && $max > $length) { $length = mt_rand($length, $max); } $output = ''; for ($i=0; $i<$length; $i++) { $which = mt_rand(0,2); if ($which === 0) { $output .= mt_rand(0,9); } elseif ($which === 1) { $output .= chr(mt_rand(65,90)); } else { $output .= chr(mt_rand(97,122)); } } return $output; } 複製代碼

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