3v4l.org

run code in 300+ PHP versions simultaneously
<?php function starts_with_upper($str) { $chr = mb_substr ($str, 0, 1, "UTF-8"); return mb_strtolower($chr, "UTF-8") != $chr; } print("STARTS WITH 'a': Hello " . starts_with_upper('Hello') . "\n\n"); print("STARTS WITH 'a': hello " . starts_with_upper('hello') . "\n\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)
8.4.120.0040.00424.03
8.4.110.0140.00618.76
8.4.100.0060.00518.80
8.4.90.0130.00718.46
8.4.80.0140.00518.72
8.4.70.0110.01017.52
8.4.60.0070.01223.86
8.4.50.0080.00318.68
8.4.40.0180.00317.42
8.4.30.0130.00620.49
8.4.20.0130.00317.74
8.4.10.0040.00717.71
8.3.250.0120.00719.05
8.3.240.0100.00517.11
8.3.230.0090.00916.72
8.3.220.0140.00318.87
8.3.210.0100.00916.61
8.3.200.0060.00316.56
8.3.190.0090.01016.57
8.3.180.0040.00518.22
8.3.170.0120.00619.01
8.3.160.0150.00318.36
8.3.150.0190.00016.73
8.3.140.0030.00518.80
8.3.130.0060.00918.24
8.3.120.0110.00719.05
8.3.110.0060.00320.94
8.3.100.0040.00424.06
8.3.90.0040.00426.77
8.3.80.0060.00318.30
8.3.70.0100.01318.21
8.3.60.0090.00616.48
8.3.50.0070.00719.86
8.3.40.0040.01120.04
8.3.30.0090.00618.37
8.3.20.0040.00424.18
8.3.10.0040.00424.66
8.3.00.0040.00426.16
8.2.290.0030.00420.52
8.2.280.0080.00318.28
8.2.270.0100.01016.37
8.2.260.0120.00616.36
8.2.250.0120.00616.73
8.2.240.0060.00317.31
8.2.230.0050.00322.58
8.2.220.0180.00437.54
8.2.210.0040.00426.77
8.2.200.0060.00316.50
8.2.190.0030.01418.41
8.2.180.0130.00725.92
8.2.170.0120.00318.96
8.2.160.0040.01122.96
8.2.150.0050.00325.66
8.2.140.0000.00724.66
8.2.130.0040.00426.16
8.2.120.0080.00026.16
8.2.110.0030.00720.38
8.2.100.0070.00317.72
8.2.90.0000.00817.63
8.2.80.0050.00317.97
8.2.70.0090.00017.63
8.2.60.0040.00417.63
8.2.50.0070.00618.56
8.2.40.0070.00519.48
8.2.30.0060.00718.78
8.2.20.0070.00418.21
8.2.10.0110.00118.61
8.2.00.0060.00619.30
8.1.330.0090.00821.95
8.1.320.0110.00816.07
8.1.310.0100.00715.79
8.1.300.0080.00019.94
8.1.290.0040.00418.88
8.1.280.0070.00725.92
8.1.270.0080.00023.99
8.1.260.0060.00326.35
8.1.250.0070.00028.09
8.1.240.0130.01023.72
8.1.230.0040.00820.93
8.1.220.0050.00517.74
8.1.210.0060.00318.77
8.1.200.0040.00417.35
8.1.190.0040.00417.23
8.1.180.0090.00318.79
8.1.170.0100.00219.22
8.1.160.0080.00419.25
8.1.150.0060.00619.04
8.1.140.0070.00618.43
8.1.130.0040.00819.22
8.1.120.0090.00218.57
8.1.110.0080.00418.49
8.1.100.0040.00818.49
8.1.90.0050.00718.48
8.1.80.0070.00618.52
8.1.70.0060.00618.48
8.1.60.0070.00518.00
8.1.50.0060.00818.48
8.1.40.0090.00418.55
8.1.30.0060.00718.63
8.1.20.0080.00618.58
8.1.10.0110.00318.47
8.1.00.0120.00218.46
8.0.300.0060.00619.60
8.0.290.0040.00416.75
8.0.280.0040.00417.07
8.0.270.0040.00818.73
8.0.260.0080.00419.00
8.0.250.0040.00818.21
8.0.240.0070.00518.27
8.0.230.0050.00618.22
8.0.220.0080.00418.15
8.0.210.0090.00418.17
8.0.200.0090.00218.25
8.0.190.0070.00518.22
8.0.180.0040.00818.18
8.0.170.0110.00218.23
8.0.160.0070.00518.24
8.0.150.0100.00218.17
8.0.140.0040.00818.12
8.0.130.0090.00318.20
8.0.120.0100.00218.17
8.0.110.0050.00718.20
8.0.100.0070.00418.19
8.0.90.0100.00218.09
8.0.80.0090.00418.20
8.0.70.0120.00118.16
8.0.60.0080.00518.12
8.0.50.0070.00518.11
8.0.30.0060.00618.12
8.0.20.0090.00418.12
8.0.10.0100.00318.21
7.4.330.0070.00416.21
7.4.320.0090.00318.04
7.4.300.0090.00318.03
7.4.290.0070.00518.05
7.4.280.0080.00418.06
7.4.270.0090.00317.97
7.4.260.0060.00617.96
7.4.250.0050.00718.00
7.4.240.0050.00618.04
7.4.230.0070.00517.94
7.4.220.0090.00217.94
7.4.210.0050.00618.04
7.4.200.0030.00517.02
7.4.190.0060.00518.06
7.4.180.0060.00518.04
7.4.160.0070.00418.04
7.4.150.0060.00517.99
7.4.140.0090.00318.02
7.4.130.0110.00017.96
7.4.120.0080.00417.96
7.4.110.0060.00618.00
7.4.100.0080.00417.94
7.4.90.0050.00617.99
7.4.80.0070.00417.98
7.4.70.0070.00517.94
7.4.60.0080.00517.98
7.4.50.0060.00617.96
7.4.40.0050.00717.87
7.4.30.0060.00517.96
7.4.20.0090.00217.90
7.4.10.0040.00718.00
7.4.00.0080.00317.95
7.3.330.0150.00316.52

preferences:
30.92 ms | 403 KiB | 5 Q