3v4l.org

run code in 300+ PHP versions simultaneously
<?php function returnFirst($rsrnum) { $char = $rsrnum[0]; return ctype_alpha($char) ? strtolower($char) : '%23'; } echo returnFirst('ADSASTEADS')."\n"; echo returnFirst(2342342)."\n"; echo returnFirst('3SASDAsd')."\n";

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)
8.3.60.0100.00316.75
8.3.50.0100.00722.15
8.3.40.0120.00318.96
8.3.30.0030.01019.13
8.3.20.0000.00820.39
8.3.10.0000.00823.51
8.3.00.0090.00020.77
8.2.180.0060.01016.63
8.2.170.0070.00722.96
8.2.160.0100.00320.38
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0000.00826.16
8.2.120.0080.00021.98
8.2.110.0070.00322.02
8.2.100.0120.00017.91
8.2.90.0030.00619.21
8.2.80.0080.00017.97
8.2.70.0030.00617.63
8.2.60.0040.00418.03
8.2.50.0040.00418.07
8.2.40.0040.00419.85
8.2.30.0090.00018.38
8.2.20.0000.00717.75
8.2.10.0020.00518.06
8.2.00.0040.00417.68
8.1.280.0060.00825.92
8.1.270.0030.00621.86
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0060.00323.86
8.1.230.0080.00419.10
8.1.220.0030.00517.74
8.1.210.0000.00818.77
8.1.200.0060.00317.23
8.1.190.0030.00917.22
8.1.180.0030.00618.10
8.1.170.0040.00418.59
8.1.160.0050.00322.05
8.1.150.0000.00818.68
8.1.140.0030.00517.53
8.1.130.0030.00317.68
8.1.120.0080.00017.36
8.1.110.0000.00717.39
8.1.100.0000.00717.34
8.1.90.0000.00817.50
8.1.80.0080.00017.38
8.1.70.0100.00017.50
8.1.60.0090.00317.48
8.1.50.0040.00417.45
8.1.40.0060.00317.59
8.1.30.0070.00317.72
8.1.20.0080.00017.54
8.1.10.0040.00417.48
8.1.00.0040.00417.51
8.0.300.0030.00318.77
8.0.290.0040.00417.18
8.0.280.0040.00418.45
8.0.270.0040.00417.30
8.0.260.0000.00617.25
8.0.250.0070.00017.07
8.0.240.0000.00717.01
8.0.230.0100.00016.90
8.0.220.0000.00716.87
8.0.210.0030.00316.90
8.0.200.0040.00417.10
8.0.190.0040.00416.95
8.0.180.0000.00716.87
8.0.170.0080.00016.98
8.0.160.0000.00716.94
8.0.150.0030.00316.94
8.0.140.0040.00416.84
8.0.130.0050.00013.39
8.0.120.0000.00816.90
8.0.110.0060.00316.84
8.0.100.0040.00417.01
8.0.90.0040.00316.74
8.0.80.0210.00416.99
8.0.70.0000.00716.86
8.0.60.0090.00017.00
8.0.50.0000.00716.76
8.0.30.0110.01317.19
8.0.20.0130.00617.40
8.0.10.0040.00417.08
8.0.00.0080.01016.81
7.4.330.0020.00215.00
7.4.320.0060.00016.44
7.4.300.0000.00816.39
7.4.290.0030.00316.59
7.4.280.0050.00316.51
7.4.270.0030.00316.55
7.4.260.0040.00416.59
7.4.250.0080.00016.42
7.4.240.0040.00416.63
7.4.230.0030.00316.25
7.4.220.0090.00916.56
7.4.210.0060.01016.53
7.4.200.0070.00016.51
7.4.190.0030.00316.46
7.4.160.0100.01016.49
7.4.150.0100.00717.40
7.4.140.0080.00917.86
7.4.130.0100.00716.51
7.4.120.0100.00716.56
7.4.110.0100.00716.70
7.4.100.0100.01016.61
7.4.90.0120.00616.54
7.4.80.0000.01819.39
7.4.70.0030.01316.48
7.4.60.0130.00716.24
7.4.50.0030.00316.37
7.4.40.0180.00016.57
7.4.30.0090.00616.50
7.4.00.0070.00714.86
7.3.330.0030.00313.27
7.3.320.0050.00013.17
7.3.310.0080.00016.17
7.3.300.0060.00016.27
7.3.290.0060.01516.23
7.3.280.0090.00716.26
7.3.270.0040.01217.40
7.3.260.0160.00716.59
7.3.250.0150.00616.40
7.3.240.0150.00616.61
7.3.230.0120.00316.39
7.3.210.0100.00716.28
7.3.200.0060.01619.39
7.3.190.0070.01116.59
7.3.180.0120.00316.41
7.3.170.0090.00616.49
7.3.160.0130.00316.31
7.3.120.0110.00314.52
7.3.10.0030.01216.57
7.3.00.0100.00316.46
7.2.330.0100.01116.57
7.2.320.0140.00716.73
7.2.310.0160.00016.38
7.2.300.0090.00816.80
7.2.290.0150.00316.81
7.2.130.0040.00816.88
7.2.120.0000.01516.80
7.2.110.0070.00716.89
7.2.100.0070.00716.96
7.2.90.0090.00616.95
7.2.80.0070.00317.14
7.2.70.0060.00916.86
7.2.60.0040.01117.08
7.2.50.0030.01016.90
7.2.40.0070.01016.81
7.2.30.0030.01116.93
7.2.20.0070.00317.14
7.2.10.0100.00616.78
7.2.00.0030.01118.23
7.1.250.0070.00715.84
7.1.100.0040.00818.09
7.1.70.0030.01016.93
7.1.60.0070.01819.46
7.1.50.0080.01517.11
7.1.00.0030.07722.36
7.0.200.0030.00316.88
7.0.140.0030.07322.04
7.0.70.0070.04021.73
7.0.60.0000.08721.73
7.0.50.0130.07722.20
7.0.40.0000.08020.05
7.0.30.0130.07720.18
7.0.20.0030.06320.11
7.0.10.0070.07720.09
7.0.00.0000.04319.98
5.6.280.0070.07021.08
5.6.220.0000.04720.65
5.6.210.0100.04320.75
5.6.200.0030.09021.04
5.6.190.0030.07321.04
5.6.180.0070.08321.07
5.6.170.0030.08721.04
5.6.160.0000.06021.11
5.6.150.0070.08021.06
5.6.140.0030.07321.05
5.6.130.0030.09021.08
5.6.120.0100.07721.01
5.6.110.0030.08721.07
5.6.100.0030.08321.17
5.6.90.0030.07721.00
5.6.80.0100.07720.40
5.6.70.0070.07720.43
5.6.60.0100.07720.46
5.6.50.0030.08020.56
5.6.40.0070.05320.45
5.6.30.0070.07720.46
5.6.20.0130.06320.44
5.6.10.0000.08020.41
5.6.00.0000.07020.51
5.5.360.0000.04320.37
5.5.350.0070.07020.48
5.5.340.0070.07320.83
5.5.330.0000.09020.80
5.5.320.0030.08020.84
5.5.310.0070.08020.86
5.5.300.0030.04720.89
5.5.290.0100.04320.91
5.5.280.0130.06320.77
5.5.270.0030.08720.73
5.5.260.0130.07320.72
5.5.250.0070.08020.70
5.5.240.0030.08020.22
5.5.230.0070.06720.21
5.5.220.0130.05320.11
5.5.210.0030.05720.21
5.5.200.0000.08020.24
5.5.190.0130.05720.26
5.5.180.0030.08320.18
5.5.160.0000.05320.13
5.5.150.0000.06020.21
5.5.140.0030.06020.17
5.5.130.0000.08720.27
5.5.120.0000.08320.20
5.5.110.0070.06320.11
5.5.100.0000.07720.10
5.5.90.0070.04720.07
5.5.80.0000.04019.96
5.5.70.0000.08320.06
5.5.60.0000.08320.09
5.5.50.0030.05320.05
5.5.40.0070.04320.09
5.5.30.0100.07020.08
5.5.20.0000.08720.15
5.5.10.0070.07319.97
5.5.00.0070.07720.04
5.4.450.0100.06719.20
5.4.440.0030.08719.47
5.4.430.0000.08019.22
5.4.420.0070.07019.47
5.4.410.0030.07319.36
5.4.400.0000.07719.21
5.4.390.0070.06019.05
5.4.380.0070.05318.91
5.4.370.0030.06719.09
5.4.360.0070.05319.05
5.4.350.0070.07318.90
5.4.340.0100.07019.13
5.4.320.0000.07319.05
5.4.310.0000.08319.23
5.4.300.0030.03719.05
5.4.290.0070.07719.05
5.4.280.0030.07719.18
5.4.270.0030.07719.03
5.4.260.0070.07319.16
5.4.250.0030.07719.25
5.4.240.0000.08019.12
5.4.230.0100.05718.87
5.4.220.0070.06319.11
5.4.210.0000.08019.02
5.4.200.0170.06718.89
5.4.190.0100.06319.17
5.4.180.0070.06719.15
5.4.170.0070.07719.15
5.4.160.0070.05019.07
5.4.150.0030.05019.11
5.4.140.0070.07016.25
5.4.130.0000.07716.49
5.4.120.0070.06316.40
5.4.110.0030.07716.46
5.4.100.0030.04016.47
5.4.90.0030.07716.38
5.4.80.0000.07316.37
5.4.70.0000.05716.32
5.4.60.0000.04716.46
5.4.50.0000.05716.31
5.4.40.0030.05016.50
5.4.30.0100.03716.40
5.4.20.0000.08016.32
5.4.10.0070.05716.29
5.4.00.0030.06015.86
5.3.290.0000.07714.66
5.3.280.0070.06014.71
5.3.270.0000.07714.65
5.3.260.0000.08314.57
5.3.250.0030.06714.55
5.3.240.0030.07014.66
5.3.230.0100.07014.54
5.3.220.0000.06714.57
5.3.210.0070.07314.70
5.3.200.0070.07014.52
5.3.190.0070.07714.50
5.3.180.0030.07314.48
5.3.170.0070.04014.53
5.3.160.0030.04014.68
5.3.150.0030.06014.63
5.3.140.0000.05014.57
5.3.130.0030.07314.58
5.3.120.0070.07714.61
5.3.110.0000.07314.63
5.3.100.0030.04314.09
5.3.90.0070.04714.02
5.3.80.0030.07714.05
5.3.70.0000.07014.03
5.3.60.0070.06714.10
5.3.50.0000.04313.85
5.3.40.0000.08014.09
5.3.30.0000.07313.96
5.3.20.0100.07013.63
5.3.10.0100.07013.63
5.3.00.0070.03313.72
5.2.170.0030.06312.36
5.2.160.0070.05712.36
5.2.150.0030.06312.36
5.2.140.0070.06012.36
5.2.130.0070.05312.36
5.2.120.0030.06312.36
5.2.110.0000.04312.36
5.2.100.0030.06012.36
5.2.90.0070.06012.36
5.2.80.0000.05712.36
5.2.70.0030.05712.36
5.2.60.0030.06312.36
5.2.50.0100.05312.36
5.2.40.0070.05312.36
5.2.30.0000.05712.36
5.2.20.0000.06312.36
5.2.10.0030.05012.36
5.2.00.0030.06012.36
5.1.60.0070.05012.36
5.1.50.0070.03712.36
5.1.40.0030.05012.36
5.1.30.0000.05312.36
5.1.20.0030.04012.36
5.1.10.0030.05712.36
5.1.00.0000.06012.36
5.0.50.0000.05012.36
5.0.40.0030.03012.36
5.0.30.0030.06712.36
5.0.20.0030.04312.36
5.0.10.0000.04712.36
5.0.00.0030.06712.36
4.4.90.0070.03012.36
4.4.80.0000.02312.36
4.4.70.0000.03712.36
4.4.60.0000.03712.36
4.4.50.0000.03012.36
4.4.40.0000.05712.36
4.4.30.0000.03712.36
4.4.20.0000.03712.36
4.4.10.0030.03012.36
4.4.00.0000.05012.36
4.3.110.0030.02012.36
4.3.100.0000.03312.36
4.3.90.0000.03712.36
4.3.80.0030.05312.36
4.3.70.0030.03312.36
4.3.60.0070.03012.36
4.3.50.0030.03012.36
4.3.40.0070.04712.36
4.3.30.0000.04012.36
4.3.20.0030.03012.36
4.3.10.0000.03312.36
4.3.00.0000.03012.36

preferences:
48.95 ms | 401 KiB | 5 Q