3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "Normal match:\n"; preg_match('/two/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); echo "Unmatched $1 is always reported as null:\n"; preg_match('/(one)?two/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); preg_match('/two(three)?/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); preg_match('/(one)?(two)/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); echo "Unmatched $2 is also reported as null:\n"; preg_match('/(two)(three)?/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match);

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)
8.4.120.0130.00724.03
8.4.110.0130.00822.30
8.4.100.0050.00318.73
8.4.90.0140.00718.80
8.4.80.0100.00418.89
8.4.70.0070.00918.20
8.4.60.0060.00518.65
8.4.50.0040.00418.84
8.4.40.0100.01017.59
8.4.30.0060.01020.30
8.4.20.0070.01320.03
8.4.10.0030.00617.85
8.3.250.0030.00618.66
8.3.240.0130.00717.25
8.3.230.0100.00916.66
8.3.220.0100.00818.90
8.3.210.0120.00816.54
8.3.200.0050.00416.63
8.3.190.0120.00816.89
8.3.180.0100.00917.19
8.3.170.0050.00518.73
8.3.160.0140.00417.29
8.3.150.0100.00716.97
8.3.140.0040.00416.61
8.3.130.0120.00418.43
8.3.120.0050.00318.84
8.3.110.0030.00620.94
8.3.100.0040.00424.06
8.3.90.0090.00026.77
8.3.80.0030.00616.63
8.3.70.0100.01316.88
8.3.60.0120.00316.63
8.3.50.0110.01118.41
8.3.40.0070.00720.46
8.3.30.0130.00318.84
8.3.20.0000.00924.18
8.3.10.0040.00424.66
8.3.00.0000.00826.16
8.2.290.0100.00920.43
8.2.280.0100.01118.29
8.2.270.0100.01016.95
8.2.260.0060.00316.58
8.2.250.0070.01316.63
8.2.240.0200.00018.73
8.2.230.0030.00622.58
8.2.220.0070.00337.54
8.2.210.0080.00026.77
8.2.200.0070.00316.88
8.2.190.0110.00416.58
8.2.180.0100.00625.92
8.2.170.0090.00619.04
8.2.160.0070.00722.96
8.2.150.0060.00325.66
8.2.140.0080.00024.66
8.2.130.0030.00526.16
8.2.120.0050.00326.16
8.2.110.0070.00320.52
8.2.100.0060.00619.76
8.2.90.0000.00817.88
8.2.80.0080.00018.78
8.2.70.0080.00017.75
8.2.60.0040.00417.63
8.2.50.0030.00617.98
8.2.40.0000.00917.88
8.2.30.0030.00617.77
8.2.20.0000.00718.20
8.2.10.0040.00418.76
8.2.00.0000.00719.20
8.1.330.0130.00521.67
8.1.320.0140.00515.95
8.1.310.0080.00016.73
8.1.300.0040.00419.78
8.1.290.0100.00018.88
8.1.280.0150.00325.92
8.1.270.0050.00323.99
8.1.260.0080.00026.35
8.1.250.0090.00028.09
8.1.240.0110.00019.23
8.1.230.0070.00420.92
8.1.220.0000.00818.52
8.1.210.0090.00018.77
8.1.200.0000.00817.22
8.1.190.0030.00917.11
8.1.180.0040.00418.10
8.1.170.0040.00417.62
8.1.160.0000.00718.85
8.1.150.0040.00418.73
8.1.140.0040.00417.48
8.1.130.0040.00420.57
8.1.120.0040.00417.40
8.1.110.0000.00817.36
8.1.100.0030.00517.38
8.1.90.0070.00017.37
8.1.80.0050.00517.48
8.1.70.0000.00717.52
8.1.60.0000.00717.56
8.1.50.0060.00317.54
8.1.40.0040.00417.56
8.1.30.0030.00617.72
8.1.20.0040.00417.68
8.1.10.0000.00817.65
8.1.00.0000.00817.43
8.0.300.0000.00818.77
8.0.290.0000.00816.75
8.0.280.0040.00418.51
8.0.270.0080.00016.84
8.0.260.0040.00418.45
8.0.250.0000.00716.97
8.0.240.0000.00617.00
8.0.230.0070.00017.00
8.0.220.0030.00316.93
8.0.210.0070.00016.95
8.0.200.0000.00816.98
8.0.190.0000.00917.03
8.0.180.0000.00716.95
8.0.170.0040.00416.81
8.0.160.0090.00316.80
8.0.150.0070.00016.78
8.0.140.0070.00416.95
8.0.130.0060.00013.32
8.0.120.0000.00816.89
8.0.110.0040.00416.82
8.0.100.0000.00716.82
8.0.90.0000.00716.75
8.0.80.0000.00716.86
8.0.70.0040.00416.77
8.0.60.0040.00416.80
8.0.50.0040.00416.96
8.0.30.0090.00016.80
8.0.20.0080.00016.93
8.0.10.0030.00517.04
8.0.00.0030.00516.93
7.4.330.0050.00015.55
7.4.320.0000.00616.73
7.4.300.0030.00316.51
7.4.290.0030.00616.66
7.4.280.0050.00316.69
7.4.270.0080.00016.58
7.4.260.0080.00013.34
7.4.250.0030.00516.66
7.4.240.0000.00716.71
7.4.230.0070.00016.66
7.4.220.0070.00016.57
7.4.210.0020.00516.76
7.4.200.0050.00316.64
7.4.190.0000.00716.68
7.4.180.0080.00016.72
7.4.160.0020.00616.79
7.4.150.0040.00416.78
7.4.140.0040.00416.41
7.4.130.0080.00016.51
7.4.120.0000.00816.72
7.4.110.0000.00816.45
7.4.100.0080.00016.77
7.4.90.0060.00216.36
7.4.80.0030.00516.60
7.4.70.0000.00916.58
7.4.60.0080.00016.68
7.4.50.0040.00416.52
7.4.40.0050.00316.63
7.4.30.0040.00416.43
7.4.20.0000.00816.53
7.4.10.0050.00216.58
7.4.00.0070.00016.62
7.3.330.0060.00316.26
7.3.320.0050.00313.14
7.3.310.0040.00416.31
7.3.300.0040.00416.27
7.3.290.0000.00816.28
7.3.280.0030.00616.30
7.3.270.0040.00416.30
7.3.260.0000.00916.25
7.3.250.0000.00716.31
7.3.240.0000.00716.31
7.3.230.0000.00716.32
7.3.220.0000.00716.18
7.3.210.0040.00416.17
7.3.200.0000.00716.21
7.3.190.0040.00416.23
7.3.180.0030.00316.05
7.3.170.0040.00416.14
7.3.160.0030.00316.09
7.3.150.0030.00316.24
7.3.140.0030.00316.16
7.3.130.0030.00316.24
7.3.120.0060.00016.25
7.3.110.0000.00716.15
7.3.100.0040.00416.21
7.3.90.0000.00716.61
7.3.80.0060.00016.30
7.3.70.0020.00516.40
7.3.60.0000.00716.50
7.3.50.0040.00416.44
7.3.40.0030.00316.46
7.3.30.0000.00716.46
7.3.20.0000.00718.24
7.3.10.0030.00618.18
7.3.00.0080.00018.11

preferences:
28.82 ms | 403 KiB | 5 Q