3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isJson($string) { json_decode($string); return (json_last_error() == JSON_ERROR_NONE); // return json_last_error(); // == JSON_ERROR_NONE); } $str1 = '{ "firstName": "Bidhan", "lastName": "Chatterjee", "age": 40, "email":"bidhan@example.com" }'; //echo json_decode($str1); $x=isJson($str1); echo $x; ?>

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)
8.3.60.0100.01016.25
8.3.50.0130.00822.05
8.3.40.0070.01018.44
8.3.30.0030.01019.09
8.3.20.0070.00020.34
8.3.10.0040.00423.66
8.3.00.0060.00319.38
8.2.180.0060.00918.17
8.2.170.0110.00422.96
8.2.160.0040.01120.55
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0000.00826.16
8.2.120.0070.00022.12
8.2.110.0070.00322.09
8.2.100.0080.00317.91
8.2.90.0000.00819.23
8.2.80.0050.00317.97
8.2.70.0060.00317.50
8.2.60.0040.00418.05
8.2.50.0030.00518.07
8.2.40.0000.00918.22
8.2.30.0050.00218.07
8.2.20.0040.00417.67
8.2.10.0030.00618.13
8.2.00.0030.00617.61
8.1.280.0100.00325.92
8.1.270.0030.00523.71
8.1.260.0050.00326.35
8.1.250.0000.00728.09
8.1.240.0000.00823.91
8.1.230.0040.00819.10
8.1.220.0030.00517.78
8.1.210.0000.00818.77
8.1.200.0080.00317.36
8.1.190.0000.00817.64
8.1.180.0040.00418.10
8.1.170.0090.00018.61
8.1.160.0030.00621.95
8.1.150.0040.00418.49
8.1.140.0080.00017.51
8.1.130.0030.00517.74
8.1.120.0040.00417.48
8.1.110.0070.00317.45
8.1.100.0080.00017.34
8.1.90.0060.00317.46
8.1.80.0000.00717.51
8.1.70.0030.00517.32
8.1.60.0020.00517.46
8.1.50.0030.00517.54
8.1.40.0040.00417.43
8.1.30.0040.00417.54
8.1.20.0040.00417.59
8.1.10.0000.00717.41
8.1.00.0040.00417.44
8.0.300.0040.00418.77
8.0.290.0070.00017.18
8.0.280.0070.00018.44
8.0.270.0070.00017.23
8.0.260.0030.00317.24
8.0.250.0040.00416.88
8.0.240.0040.00416.91
8.0.230.0030.00316.90
8.0.220.0070.00016.88
8.0.210.0030.00316.79
8.0.200.0060.00016.95
8.0.190.0030.00516.91
8.0.180.0070.00016.80
8.0.170.0000.00716.94
8.0.160.0040.00416.89
8.0.150.0000.00716.80
8.0.140.0050.00316.74
8.0.130.0000.00613.21
8.0.120.0050.00216.85
8.0.110.0000.00716.87
8.0.100.0040.00416.92
8.0.90.0050.00316.84
8.0.80.0030.01216.84
8.0.70.0000.00716.95
8.0.60.0040.00416.71
8.0.50.0050.00316.92
8.0.30.0150.01016.98
8.0.20.0110.00917.40
8.0.10.0000.00716.82
8.0.00.0140.00716.70
7.4.330.0050.00015.08
7.4.320.0000.00616.61
7.4.300.0000.00616.59
7.4.290.0050.00316.55
7.4.280.0040.00416.49
7.4.270.0040.00416.42
7.4.260.0040.00416.48
7.4.250.0000.00816.61
7.4.240.0060.00116.53
7.4.230.0000.00716.59
7.4.220.0060.00916.54
7.4.210.0080.00716.55
7.4.200.0040.00416.51
7.4.190.0000.00716.63
7.4.160.0060.01016.62
7.4.150.0100.00617.40
7.4.140.0110.01117.86
7.4.130.0050.01116.58
7.4.120.0100.00716.54
7.4.110.0070.01016.39
7.4.100.0090.00916.52
7.4.90.0120.01216.67
7.4.80.0000.01819.39
7.4.70.0060.01016.44
7.4.60.0060.01116.45
7.4.50.0000.00716.38
7.4.40.0120.00322.77
7.4.30.0070.01016.41
7.4.00.0070.00714.95
7.3.330.0000.00513.30
7.3.320.0060.00013.23
7.3.310.0030.00516.33
7.3.300.0000.00716.28
7.3.290.0090.00616.31
7.3.280.0120.00716.35
7.3.270.0160.00017.40
7.3.260.0150.00816.23
7.3.250.0090.01316.41
7.3.240.0120.00916.62
7.3.230.0130.00316.68
7.3.210.0170.00016.46
7.3.200.0160.00319.39
7.3.190.0060.01216.50
7.3.180.0140.00316.36
7.3.170.0110.00716.52
7.3.160.0100.00716.66
7.3.120.0000.01214.94
7.3.10.0030.00716.48
7.3.00.0090.00616.63
7.2.330.0030.01816.56
7.2.320.0070.01116.64
7.2.310.0060.01516.54
7.2.300.0090.00916.63
7.2.290.0090.01216.67
7.2.130.0080.00416.83
7.2.120.0040.00716.77
7.2.110.0060.00616.78
7.2.100.0030.01116.79
7.2.90.0090.00716.76
7.2.80.0090.00416.93
7.2.70.0110.00316.93
7.2.60.0050.00816.95
7.2.50.0050.01016.66
7.2.40.0050.01016.63
7.2.30.0060.00916.91
7.2.20.0060.00816.89
7.2.10.0030.00916.82
7.2.00.0070.00717.80
7.1.250.0060.00415.71
7.1.100.0110.00018.18
7.1.70.0040.00417.33
7.1.60.0100.01319.46
7.1.50.0110.01116.80
7.1.00.0000.08022.54
7.0.200.0110.00014.92
7.0.140.0100.06721.92
7.0.60.0170.07720.05
7.0.50.0100.03717.95
7.0.40.0000.05320.23
7.0.30.0370.04720.30
7.0.20.0500.04020.22
7.0.10.0030.07020.33
7.0.00.0070.05020.15
5.6.280.0000.07721.08
5.6.210.0100.07720.45
5.6.200.0070.06018.27
5.6.190.0070.08720.50
5.6.180.0370.06320.57
5.6.170.0100.04720.58
5.6.160.0070.05020.39
5.6.150.0130.05318.16
5.6.140.0100.04718.27
5.6.130.0030.05718.21
5.6.120.0170.07721.12
5.6.110.0100.07320.96
5.6.100.0070.09021.13
5.6.90.0130.08020.99
5.6.80.0130.07720.38
5.5.350.0070.07320.47
5.5.340.0030.08017.99
5.5.330.0070.05320.42
5.5.320.0400.07720.51
5.5.310.0230.04720.38
5.5.300.0070.05018.01
5.5.290.0100.07717.95
5.5.280.0170.05020.96
5.5.270.0100.04720.96
5.5.260.0230.07020.86
5.5.250.0100.05720.68
5.5.240.3870.03720.26
5.4.450.0600.05319.56
5.4.440.0800.07719.39
5.4.430.0030.06719.63
5.4.420.0170.05019.39
5.4.410.0070.05719.29
5.4.400.0030.06719.23
5.4.390.0070.05319.05
5.4.380.0200.06018.53
5.4.370.0200.06318.52
5.4.360.0400.04718.65
5.4.350.0230.06318.84
5.4.340.0270.06318.63
5.4.320.0060.03612.50
5.4.310.0080.03612.50
5.4.300.0070.03512.50
5.4.290.0080.05012.48
5.4.280.0130.03212.39
5.4.270.0060.04112.38
5.4.260.0040.04312.39
5.4.250.0040.05512.39
5.4.240.0080.03712.38
5.4.230.0090.03712.38
5.4.220.0110.05412.38
5.4.210.0080.04512.38
5.4.200.0120.03912.38
5.4.190.0060.03812.37
5.4.180.0230.06712.38
5.4.170.0090.05612.38
5.4.160.0130.05312.38
5.4.150.0070.05312.37
5.4.140.0120.05912.06
5.4.130.0080.03712.04
5.4.120.0110.06112.00
5.4.110.0090.04912.00
5.4.100.0200.11912.00
5.4.90.0100.03612.00
5.4.80.0080.04212.00
5.4.70.0070.03912.00
5.4.60.0100.03411.99
5.4.50.0150.03312.00
5.4.40.0150.04211.98
5.4.30.0080.04111.97
5.4.20.0110.03511.98
5.4.10.0070.04011.98
5.4.00.0060.03911.46
5.3.290.0080.04012.80
5.3.280.0090.03812.71
5.3.270.0060.04412.73
5.3.260.0090.04212.72
5.3.250.0120.05112.72
5.3.240.0090.04312.72
5.3.230.0080.04212.70
5.3.220.0060.04012.68
5.3.210.0090.05312.68
5.3.200.0090.04512.68
5.3.190.0080.04312.68
5.3.180.0060.06212.68
5.3.170.0080.04912.66
5.3.160.0090.04512.68
5.3.150.0070.04612.67
5.3.140.0120.04512.66
5.3.130.0080.03812.66
5.3.120.0070.04812.65
5.3.110.0070.04112.66
5.3.100.0070.03712.12
5.3.90.0110.03412.10
5.3.80.0080.04212.09
5.3.70.0100.05012.09
5.3.60.0140.04512.08
5.3.50.0090.04412.02
5.3.40.0070.04112.02
5.3.30.0110.06011.98
5.3.20.0140.04511.76
5.3.10.0080.05511.73
5.3.00.0100.04011.71
5.2.170.0120.0299.22
5.2.160.0070.0329.22
5.2.150.0050.0409.22
5.2.140.0060.0339.21
5.2.130.0040.0319.18
5.2.120.0070.0279.18
5.2.110.0080.0299.18
5.2.100.0060.0309.18
5.2.90.0140.0619.18
5.2.80.0130.0389.17
5.2.70.0070.0569.17
5.2.60.0060.0359.13
5.2.50.0080.0339.10
5.2.40.0140.0319.07
5.2.30.0090.0289.05
5.2.20.0060.0309.04
5.2.10.0080.0308.95
5.2.00.0080.0318.81
5.1.60.0090.0248.09
5.1.50.0070.0258.08
5.1.40.0050.0268.07
5.1.30.0070.0278.41
5.1.20.0070.0328.44
5.1.10.0060.0438.16
5.1.00.0080.0378.16
5.0.50.0040.0236.63
5.0.40.0040.0216.50
5.0.30.0030.0336.31
5.0.20.0050.0196.28
5.0.10.0050.0216.26
5.0.00.0050.0296.25
4.4.90.0020.0224.78
4.4.80.0030.0174.75
4.4.70.0020.0194.76
4.4.60.0050.0174.75
4.4.50.0050.0234.77
4.4.40.0020.0304.71
4.4.30.0030.0214.76
4.4.20.0070.0194.85
4.4.10.0040.0204.85
4.4.00.0040.0264.76
4.3.110.0060.0144.67
4.3.100.0040.0294.66
4.3.90.0030.0164.63
4.3.80.0070.0244.58
4.3.70.0040.0224.63
4.3.60.0050.0234.63
4.3.50.0050.0214.63
4.3.40.0080.0654.54
4.3.30.0050.0233.29
4.3.20.0060.0213.27
4.3.10.0020.0253.24
4.3.00.0100.0208.65

preferences:
34.87 ms | 401 KiB | 5 Q