3v4l.org

run code in 300+ PHP versions simultaneously
<?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; } return $rand_value; } echo genKey(24);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
7.4.10.0030.01316.39
7.4.00.0040.01516.59
7.3.130.0070.01016.39
7.3.120.0090.00815.70
7.3.110.0050.01315.66
7.3.100.0070.00915.78
7.3.90.0050.01115.65
7.3.80.0060.00915.78
7.3.70.0040.01415.65
7.3.60.0030.01015.57
7.3.50.0070.01015.63
7.3.40.0060.00715.53
7.3.30.0070.00715.72
7.3.20.0090.00517.41
7.3.10.0080.00916.90
7.3.00.0050.00816.93
7.2.260.0100.01016.73
7.2.250.0110.01116.73
7.2.240.0000.01615.80
7.2.230.0070.01016.04
7.2.220.0060.00815.82
7.2.210.0070.01215.98
7.2.200.0040.01115.97
7.2.190.0020.01515.90
7.2.180.0030.01315.89
7.2.170.0100.00815.81
7.2.160.0050.01115.66
7.2.150.0050.01117.49
7.2.140.0050.01017.66
7.2.130.0030.01217.19
7.2.120.0060.00917.29
7.2.110.0060.00817.34
7.2.100.0060.01017.33
7.2.90.0090.00617.35
7.2.80.0040.00917.14
7.2.70.0060.00917.27
7.2.60.0070.00517.22
7.2.50.0070.00617.32
7.2.40.0080.00717.35
7.2.30.0080.00417.29
7.2.20.0050.00817.29
7.2.10.0050.00917.26
7.2.00.0060.00617.20
7.1.330.0070.00816.61
7.1.320.0050.00916.52
7.1.310.0090.00416.61
7.1.300.0060.00916.60
7.1.290.0050.01016.51
7.1.280.0060.00916.56
7.1.270.0090.00716.50
7.1.260.0080.00916.61
7.1.250.0060.00816.17
7.1.240.0070.00716.43
7.1.230.0050.00916.66
7.1.220.0050.01016.54
7.1.210.0060.00816.60
7.1.200.0090.00316.52
7.1.190.0010.01116.62
7.1.180.0060.01016.52
7.1.170.0050.00616.50
7.1.160.0080.00716.60
7.1.150.0030.00916.41
7.1.140.0070.00816.64
7.1.130.0080.00816.51
7.1.120.0070.00816.44
7.1.110.0030.01016.47
7.1.100.0030.01416.65
7.1.90.0070.00816.55
7.1.80.0070.00716.53
7.1.70.0060.01016.82
7.1.60.0120.00617.54
7.1.50.0070.00816.70
7.1.40.0090.00316.42
7.1.30.0080.00716.65
7.1.20.0080.00716.54
7.1.10.0050.00716.42
7.1.00.0070.02718.54
7.0.330.0050.00816.06
7.0.320.0040.01216.28
7.0.310.0070.00616.23
7.0.300.0060.00816.14
7.0.290.0100.00316.17
7.0.280.0060.00616.33
7.0.270.0050.00916.18
7.0.260.0070.00716.12
7.0.250.0030.00716.19
7.0.240.0060.00616.27
7.0.230.0080.00916.28
7.0.220.0060.00716.24
7.0.210.0050.00416.03
7.0.200.0020.01116.45
7.0.190.0110.00316.24
7.0.180.0050.01116.22
7.0.170.0020.01516.15
7.0.160.0090.00716.13
7.0.150.0110.00416.30
7.0.140.0090.02518.13
7.0.130.0080.00516.21
7.0.120.0080.00816.14
7.0.110.0050.01016.29
7.0.100.0040.02217.52
7.0.90.0100.03017.46
7.0.80.0100.02917.47
7.0.70.0020.03717.41
7.0.60.0130.02817.42
7.0.50.0090.02317.67
7.0.40.0090.02916.09
7.0.30.0050.03316.12
7.0.20.0150.02116.15
7.0.10.0070.03116.16
7.0.00.0020.02216.16
5.6.400.0060.00916.30
5.6.390.0060.00916.18
5.6.380.0080.00815.30
5.6.370.0060.00915.16
5.6.360.0020.01215.08
5.6.350.0090.00715.08
5.6.340.0090.00315.02
5.6.330.0070.00715.11
5.6.320.0070.00815.30
5.6.310.0090.00515.25
5.6.300.0090.00615.25
5.6.290.0080.00815.30
5.6.280.0090.02617.17
5.6.270.0050.01015.21
5.6.260.0040.01215.20
5.6.250.0020.03616.96
5.6.240.0050.02516.97
5.6.230.0080.03117.04
5.6.220.0060.03016.93
5.6.210.0080.02916.99
5.6.200.0070.03117.14
5.6.190.0080.03117.18
5.6.180.0070.03017.19
5.6.170.0080.03117.13
5.6.160.0100.02217.16
5.6.150.0030.03617.13
5.6.140.0070.03217.03
5.6.130.0060.03317.13
5.6.120.0050.02717.15
5.6.110.0080.03217.03
5.6.100.0070.03017.15
5.6.90.0100.02017.31
5.6.80.0090.03016.87
5.6.70.0060.03616.96
5.6.60.0130.01216.99
5.6.50.0050.03116.83
5.6.40.0070.03416.87
5.6.30.0070.03116.89
5.6.20.0100.02516.91
5.6.10.0060.03416.85
5.6.00.0050.03116.92
5.5.380.0050.03015.94
5.5.370.0110.03015.95
5.5.360.0100.02915.84
5.5.350.0070.03815.89
5.5.340.0110.01715.90
5.5.330.0050.02816.01
5.5.320.0140.02915.98
5.5.310.0060.02116.04
5.5.300.0090.02416.06
5.5.290.0060.03316.09
5.5.280.0080.03216.05
5.5.270.0090.02916.14
5.5.260.0050.02116.14
5.5.250.0100.02815.88
5.5.240.0080.03015.87
5.5.230.0060.03315.78
5.5.220.0110.01615.77
5.5.210.0050.02015.81
5.5.200.0060.02515.82
5.5.190.0050.03015.69
5.5.180.0100.02715.88
5.5.170.0090.00413.61
5.5.160.0060.02315.83
5.5.150.0070.02815.77
5.5.140.0080.02915.77
5.5.130.0040.02015.89
5.5.120.0070.03015.80
5.5.110.0050.02115.63
5.5.100.0050.02815.76
5.5.90.0090.02915.75
5.5.80.0070.01915.68
5.5.70.0020.03515.77
5.5.60.0060.03215.75
5.5.50.0070.03015.73
5.5.40.0020.01915.74
5.5.30.0070.01915.63
5.5.20.0040.01915.64
5.5.10.0060.01715.78
5.5.00.0030.01815.68
5.4.450.0090.02014.82
5.4.440.0030.03314.78
5.4.430.0060.03214.76
5.4.420.0070.02814.84
5.4.410.0120.02514.64
5.4.400.0040.03114.67
5.4.390.0050.03214.70
5.4.380.0040.02614.70
5.4.370.0030.03114.53
5.4.360.0030.03414.70
5.4.350.0050.02914.65
5.4.340.0020.03414.48
5.4.330.0030.00812.50
5.4.320.0080.02514.77
5.4.310.0060.02914.56
5.4.300.0060.03114.70
5.4.290.0030.03414.70
5.4.280.0060.02814.58
5.4.270.0060.02014.70
5.4.260.0050.03014.66
5.4.250.0080.02714.61
5.4.240.0060.02714.56
5.4.230.0060.03114.60
5.4.220.0070.02614.73
5.4.210.0040.02614.57
5.4.200.0020.02014.67
5.4.190.0050.01914.55
5.4.180.0050.01914.75
5.4.170.0030.01814.63
5.4.160.0010.02114.73
5.4.150.0020.02414.68
5.4.140.0060.01313.72
5.4.130.0040.01913.68
5.4.120.0020.02013.68
5.4.110.0060.01613.76
5.4.100.0080.01713.86
5.4.90.0060.01413.69
5.4.80.0050.01513.86
5.4.70.0040.01713.79
5.4.60.0060.01813.76
5.4.50.0020.01913.78
5.4.40.0050.01913.70
5.4.30.0010.01913.82
5.4.20.0020.01813.77
5.4.10.0020.01913.80
5.4.00.0040.01713.46
5.3.290.0060.03113.11
5.3.280.0010.03413.04
5.3.270.0040.01613.02
5.3.260.0050.01513.09
5.3.250.0050.01612.99
5.3.240.0020.02113.04
5.3.230.0000.02113.03
5.3.220.0050.01712.88
5.3.210.0030.01912.95
5.3.200.0070.02613.01
5.3.190.0020.02312.99
5.3.180.0010.01813.03
5.3.170.0070.01613.01
5.3.160.0040.01812.95
5.3.150.0070.01513.04
5.3.140.0060.02612.94
5.3.130.0080.01512.98
5.3.120.0050.01812.98
5.3.110.0010.01813.03
5.3.100.0030.01912.84
5.3.90.0010.01912.78
5.3.80.0010.01912.78
5.3.70.0010.02012.87
5.3.60.0030.01712.69
5.3.50.0010.02212.80
5.3.40.0030.01712.84
5.3.30.0050.01612.78
5.3.20.0040.01812.62
5.3.10.0020.01912.59
5.3.00.0020.02112.65

preferences:
39.77 ms | 401 KiB | 5 Q