Online PHP editor | output for DP27H

<?php function genKey($length) { if($length > 0) { $rand_id=""; for($i=1; $i <= $length; $i++) { mt_srand((double)microtime() * 1000000); $num = mt_rand(1,72); $rand_id .= assign_rand_value($num); } } return $rand_id; } function assign_rand_value($num) { switch($num) { case "1": $rand_value = "a"; break; case "2": $rand_value = "b"; break; case "3": $rand_value = "c"; break; case "4": $rand_value = "d"; break; case "5": $rand_value = "e"; break; case "6": $rand_value = "f"; break; case "7": $rand_value = "g"; break; case "8": $rand_value = "h"; break; case "9": $rand_value = "i"; break; case "10": $rand_value = "j"; break; case "11": $rand_value = "k"; break; case "12": $rand_value = "l"; break; case "13": $rand_value = "m"; break; case "14": $rand_value = "n"; break; case "15": $rand_value = "o"; break; case "16": $rand_value = "p"; break; case "17": $rand_value = "q"; break; case "18": $rand_value = "r"; break; case "19": $rand_value = "s"; break; case "20": $rand_value = "t"; break; case "21": $rand_value = "u"; break; case "22": $rand_value = "v"; break; case "23": $rand_value = "w"; break; case "24": $rand_value = "x"; break; case "25": $rand_value = "y"; break; case "26": $rand_value = "z"; break; case "27": $rand_value = "0"; break; case "28": $rand_value = "1"; break; case "29": $rand_value = "2"; break; case "30": $rand_value = "3"; break; case "31": $rand_value = "4"; break; case "32": $rand_value = "5"; break; case "33": $rand_value = "6"; break; case "34": $rand_value = "7"; break; case "35": $rand_value = "8"; break; case "36": $rand_value = "9"; break; case "37": $rand_value = "*"; break; case "38": $rand_value = "~"; break; case "39": $rand_value = "-"; break; case "40": $rand_value = "|"; break; case "41": $rand_value = "^"; break; case "42": $rand_value = "%"; break; case "43": $rand_value = " "; break; case "44": $rand_value = "_"; break; case "45": $rand_value = "+"; break; case "46": $rand_value = "="; break; case "47": $rand_value = "A"; break; case "48": $rand_value = "B"; break; case "49": $rand_value = "C"; break; case "50": $rand_value = "D"; break; case "51": $rand_value = "E"; break; case "52": $rand_value = "F"; break; case "53": $rand_value = "G"; break; case "54": $rand_value = "H"; break; case "55": $rand_value = "I"; break; case "56": $rand_value = "J"; break; case "57": $rand_value = "K"; break; case "58": $rand_value = "L"; break; case "59": $rand_value = "M"; break; case "60": $rand_value = "N"; break; case "61": $rand_value = "O"; break; case "62": $rand_value = "P"; break; case "63": $rand_value = "Q"; break; case "64": $rand_value = "R"; break; case "65": $rand_value = "S"; break; case "66": $rand_value = "T"; break; case "67": $rand_value = "U"; break; case "68": $rand_value = "V"; break; case "69": $rand_value = "W"; break; case "70": $rand_value = "X"; break; case "71": $rand_value = "Y"; break; case "72": $rand_value = "Z"; break; } echo $rand_value; }