3v4l.org

run code in 300+ PHP versions simultaneously
<?php function is_str_lowercase($str1) { for ($sc = 0; $sc < strlen($str1); $sc++) { if (ord($str1[$sc]) >= ord('A') && ord($str1[$sc]) <= ord('Z')) { return false; } } return true; } var_dump(is_str_lowercase('abc def ghi')); var_dump(is_str_lowercase('abc dEf ghi')); ?>

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)
8.3.40.0140.00318.67
8.3.30.0040.01119.05
8.3.20.0040.00420.26
8.3.10.0000.00823.39
8.3.00.0040.00719.26
8.2.170.0110.00422.96
8.2.160.0070.01020.53
8.2.150.0030.00524.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0000.00722.18
8.2.110.0070.01322.25
8.2.100.0120.00017.82
8.2.90.0000.01018.03
8.2.80.0060.00317.97
8.2.70.0040.00417.63
8.2.60.0060.00318.04
8.2.50.0000.00818.07
8.2.40.0000.00819.88
8.2.30.0040.00418.20
8.2.20.0090.00017.80
8.2.10.0040.00418.14
8.2.00.0050.00317.60
8.1.270.0000.00823.96
8.1.260.0000.00826.35
8.1.250.0080.00028.09
8.1.240.0030.00722.60
8.1.230.0070.00321.03
8.1.220.0050.00317.74
8.1.210.0080.00018.85
8.1.200.0060.00317.36
8.1.190.0000.00817.39
8.1.180.0090.00019.01
8.1.170.0040.00418.59
8.1.160.0070.00022.02
8.1.150.0080.00018.63
8.1.140.0060.00317.33
8.1.130.0030.00317.92
8.1.120.0050.00317.37
8.1.110.0040.00417.34
8.1.100.0080.00017.37
8.1.90.0050.00217.41
8.1.80.0040.00417.55
8.1.70.0040.00417.37
8.1.60.0030.00617.64
8.1.50.0000.00717.54
8.1.40.0040.00417.54
8.1.30.0000.00917.65
8.1.20.0030.00517.65
8.1.10.0000.00717.57
8.1.00.0070.00017.52
8.0.300.0040.00419.90
8.0.290.0000.00717.04
8.0.280.0080.00018.41
8.0.270.0050.00317.31
8.0.260.0030.00317.32
8.0.250.0030.00316.98
8.0.240.0030.00316.92
8.0.230.0030.00316.96
8.0.220.0000.00716.83
8.0.210.0030.00316.94
8.0.200.0000.00716.94
8.0.190.0040.00316.97
8.0.180.0000.00916.92
8.0.170.0040.00416.93
8.0.160.0000.00716.90
8.0.150.0000.00716.93
8.0.140.0040.00416.82
8.0.130.0070.00013.29
8.0.120.0040.00416.89
8.0.110.0000.00816.93
8.0.100.0040.00416.96
8.0.90.0040.00416.77
8.0.80.0040.01116.96
8.0.70.0070.00016.95
8.0.60.0000.00816.76
8.0.50.0000.00716.68
8.0.30.0100.01217.00
8.0.20.0090.00917.40
8.0.10.0070.00017.11
8.0.00.0070.01016.80
7.4.330.0000.00515.02
7.4.320.0000.00616.51
7.4.300.0030.00316.66
7.4.290.0000.00716.56
7.4.280.0030.00616.61
7.4.270.0040.00316.54
7.4.260.0030.00316.63
7.4.250.0000.00816.50
7.4.240.0040.00416.53
7.4.230.0060.00016.41
7.4.220.0140.00316.65
7.4.210.0040.01016.58
7.4.200.0000.00716.35
7.4.190.0000.00716.76
7.4.160.0040.01116.47
7.4.150.0110.00617.40
7.4.140.0100.00917.86
7.4.130.0100.00716.58
7.4.120.0080.00916.61
7.4.110.0060.01216.65
7.4.100.0120.00616.37
7.4.90.0150.00416.30
7.4.80.0080.01619.39
7.4.70.0170.00416.52
7.4.60.0170.00016.47
7.4.50.0000.00816.36
7.4.40.0080.00822.77
7.4.30.0130.00316.57
7.4.00.0030.01415.11
7.3.330.0050.00013.30
7.3.320.0000.00513.22
7.3.310.0030.00616.27
7.3.300.0000.00616.32
7.3.290.0070.00716.30
7.3.280.0100.00816.35
7.3.270.0030.01617.40
7.3.260.0120.01116.48
7.3.250.0110.00916.45
7.3.240.0060.01216.39
7.3.230.0190.00016.42
7.3.210.0080.00916.52
7.3.200.0170.00619.39
7.3.190.0100.01016.49
7.3.180.0030.01216.52
7.3.170.0090.00616.44
7.3.160.0060.01016.56
7.3.120.0000.01514.87
7.3.10.0110.00416.74
7.3.00.0110.00016.71
7.2.330.0120.00616.88
7.2.320.0100.00716.92
7.2.310.0100.00716.50
7.2.300.0120.00416.66
7.2.290.0140.00616.46
7.2.130.0040.01116.54
7.2.120.0030.01216.71
7.2.110.0090.00616.97
7.2.100.0090.00317.06
7.2.90.0000.01116.94
7.2.80.0060.00716.51
7.2.70.0030.01016.75
7.2.60.0070.00416.97
7.2.50.0030.00716.91
7.2.40.0130.00316.74
7.2.30.0030.01016.96
7.2.20.0070.00317.06
7.2.10.0000.00916.91
7.2.00.0080.00517.97
7.1.250.0030.01015.82
7.1.200.0000.01115.64
7.1.100.0030.00717.87
7.1.70.0030.01416.97
7.1.60.0100.01419.46
7.1.50.0100.01316.86
7.1.00.0100.07022.30
7.0.200.0040.00416.68
7.0.140.0030.07322.00
7.0.110.0200.08019.88
7.0.100.0230.07320.03
7.0.90.0270.07319.94
7.0.80.0230.06719.98
7.0.70.0100.09019.86
7.0.60.0230.07320.02
7.0.50.0100.08720.27
7.0.40.0170.06720.22
7.0.30.0000.10320.16
7.0.20.0130.07320.27
7.0.10.0100.07720.11
7.0.00.0100.04320.08
5.6.280.0070.07021.10
5.6.250.0100.07720.72
5.6.240.0100.08720.70
5.6.230.0000.08720.47
5.6.220.0070.07320.65
5.6.210.0070.08020.81
5.6.200.0070.08321.06
5.6.190.0200.06721.05
5.6.180.0100.05021.05
5.6.170.0130.07321.13
5.6.160.0070.07321.19
5.6.150.0170.07321.14
5.6.140.0100.07020.99
5.6.130.0070.06720.99
5.6.120.0170.07321.08
5.6.110.0130.07721.14
5.6.100.0100.08321.26
5.6.90.0030.08021.11
5.6.80.0130.07720.68
5.6.70.0100.07720.65
5.6.60.0070.07020.32
5.6.50.0000.05320.65
5.6.40.0130.06720.58
5.6.30.0000.08320.63
5.6.20.0030.07720.44
5.6.10.0030.07720.45
5.6.00.0170.06020.61
5.5.380.0070.05720.29
5.5.370.0000.07320.33
5.5.360.0100.08020.46
5.5.350.0030.08720.47
5.5.340.0030.05320.93
5.5.330.0070.08321.02
5.5.320.0230.06720.91
5.5.310.0030.08720.90
5.5.300.0070.07020.97
5.5.290.0070.09020.75
5.5.280.0070.07720.70
5.5.270.0100.08320.73
5.5.260.0130.07320.74
5.5.250.0130.07320.59
5.5.240.0170.07020.13
5.5.230.0100.06020.23
5.5.220.0170.06320.28
5.5.210.0130.06720.08
5.5.200.0070.04320.16
5.5.190.0170.07320.19
5.5.180.0170.07020.22
5.5.160.0130.06720.04
5.5.150.0230.06320.16
5.5.140.0100.07720.30
5.5.130.0030.07720.05
5.5.120.0000.08720.36
5.5.110.0070.08020.23
5.5.100.0170.07020.25
5.5.90.0070.07020.03
5.5.80.0100.08020.27
5.5.70.0070.07320.01
5.5.60.0130.07720.21
5.5.50.0100.07320.14
5.5.40.0100.07019.97
5.5.30.0100.08020.21
5.5.20.0100.07320.00
5.5.10.0130.03320.23
5.5.00.0030.04020.11
5.4.450.0030.07719.32
5.4.440.0100.08019.33
5.4.430.0030.05019.57
5.4.420.0030.05319.33
5.4.410.0070.07019.20
5.4.400.0100.07718.99
5.4.390.0100.07319.04
5.4.380.0030.08019.14
5.4.370.0030.08019.33
5.4.360.0070.07319.31
5.4.350.0030.08319.22
5.4.340.0070.08319.02
5.4.320.0070.04319.09
5.4.310.0100.04319.11
5.4.300.0230.06019.20
5.4.290.0200.05718.94
5.4.280.0030.08319.34
5.4.270.0000.07019.16
5.4.260.0130.07018.99
5.4.250.0170.06019.02
5.4.240.0070.04719.16
5.4.230.0070.06019.32
5.4.220.0070.07319.18
5.4.210.0070.07319.02
5.4.200.0030.08019.09
5.4.190.0100.07318.93
5.4.180.0200.03719.00
5.4.170.0070.03719.17
5.4.160.0070.08019.29
5.4.150.0130.07318.96
5.4.140.0130.05716.34
5.4.130.0070.07316.46
5.4.120.0070.06316.52
5.4.110.0030.07716.54
5.4.100.0130.06316.50
5.4.90.0130.06316.66
5.4.80.0030.07016.53
5.4.70.0000.07316.63
5.4.60.0170.05016.52
5.4.50.0030.05316.54
5.4.40.0030.07716.64
5.4.30.0030.07316.18
5.4.20.0130.07016.52
5.4.10.0100.03716.43
5.4.00.0100.07015.88
5.3.290.0030.07314.67
5.3.280.0130.07314.68
5.3.270.0030.04014.62
5.3.260.0030.04714.62
5.3.250.0030.07014.62
5.3.240.0100.07314.62
5.3.230.0130.05014.68
5.3.220.0100.06714.57
5.3.210.0130.07314.52
5.3.200.0070.07314.69
5.3.190.0000.08014.57
5.3.180.0000.06314.59
5.3.170.0100.06714.57
5.3.160.0170.06014.42
5.3.150.0070.07314.59
5.3.140.0100.07714.64
5.3.130.0070.07314.55
5.3.120.0100.07014.54
5.3.110.0100.07714.69
5.3.100.0000.05714.07
5.3.90.0070.04713.98
5.3.80.0000.04314.07
5.3.70.0100.04714.08
5.3.60.0070.03313.86
5.3.50.0000.04013.95
5.3.40.0130.04714.02
5.3.30.0030.03714.13
5.3.20.0100.03013.70
5.3.10.0070.03313.88
5.3.00.0000.03713.67
5.2.170.0100.02711.14
5.2.160.0030.03310.99
5.2.150.0070.03011.28
5.2.140.0070.02711.15
5.2.130.0000.03011.09
5.2.120.0070.03011.07
5.2.110.0000.03011.10
5.2.100.0070.02311.06
5.2.90.0000.04011.11
5.2.80.0030.03311.12
5.2.70.0000.03011.23
5.2.60.0030.03011.04
5.2.50.0070.04711.02
5.2.40.0000.05310.98
5.2.30.0000.06711.19
5.2.20.0030.03011.09
5.2.10.0000.06010.72
5.2.00.0030.05710.72
5.1.60.0070.0409.98
5.1.50.0070.02010.25
5.1.40.0030.02310.15
5.1.30.0000.03010.20
5.1.20.0130.03710.33
5.1.10.0030.05710.07
5.1.00.0000.03010.04
5.0.50.0030.0408.51
5.0.40.0100.0378.23
5.0.30.0000.0678.28
5.0.20.0000.0238.21
5.0.10.0000.0478.16
5.0.00.0070.0278.13
4.4.90.0030.0307.72
4.4.80.0000.0237.72
4.4.70.0070.0337.72
4.4.60.0000.0237.72
4.4.50.0030.0237.72
4.4.40.0000.0477.72
4.4.30.0070.0207.72
4.4.20.0000.0337.72
4.4.10.0000.0277.72
4.4.00.0000.0477.72
4.3.110.0030.0207.72
4.3.100.0070.0307.72
4.3.90.0000.0377.72
4.3.80.0030.0537.72
4.3.70.0030.0307.72
4.3.60.0000.0177.72
4.3.50.0000.0337.72
4.3.40.0030.0507.72
4.3.30.0000.0377.72
4.3.20.0030.0177.72
4.3.10.0000.0207.72
4.3.00.0000.0207.72

preferences:
42.39 ms | 400 KiB | 5 Q