3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isJson($string) { $decoded = json_decode($string); return (json_last_error() == JSON_ERROR_NONE); } if ( isJson('"hello"') ) { echo "valid JSON"; } else { echo "not valid JSON"; }

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)
8.3.60.0000.01516.35
8.3.50.0100.01018.33
8.3.40.0110.00418.68
8.3.30.0110.00418.75
8.3.20.0080.00022.23
8.3.10.0040.00421.94
8.3.00.0080.00022.57
8.2.180.0110.00716.38
8.2.170.0030.01718.94
8.2.160.0030.01020.53
8.2.150.0040.00424.18
8.2.140.0000.00724.66
8.2.130.0040.00426.16
8.2.120.0060.00317.92
8.2.110.0100.00019.34
8.2.100.0150.00817.69
8.2.90.0120.00817.64
8.2.80.0150.00518.63
8.2.70.0140.00617.31
8.2.60.0180.00117.50
8.2.50.0090.00617.87
8.2.40.0110.00617.84
8.2.30.0140.00317.77
8.2.20.0140.00417.76
8.2.10.0140.00418.18
8.2.00.0110.00618.18
8.1.280.0170.00325.92
8.1.270.0040.00422.14
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0030.00621.15
8.1.230.0150.00519.02
8.1.220.0150.00417.31
8.1.210.0120.00617.98
8.1.200.0130.00517.24
8.1.190.0120.00617.11
8.1.180.0160.00817.37
8.1.170.0140.00417.89
8.1.160.0130.00417.97
8.1.150.0130.00518.04
8.1.140.0090.00918.62
8.1.130.0070.00917.55
8.1.120.0120.00617.52
8.1.110.0120.00417.46
8.1.100.0130.00517.53
8.1.90.0140.00417.50
8.1.80.0140.00317.49
8.1.70.0090.00817.44
8.1.60.0110.00517.61
8.1.50.0130.00417.52
8.1.40.0110.00617.50
8.1.30.0110.00617.62
8.1.20.0110.00417.54
8.1.10.0090.00517.46
8.1.00.0070.00917.50
8.0.300.0060.00618.26
8.0.290.0090.00516.50
8.0.280.0070.00617.63
8.0.270.0100.00417.25
8.0.260.0120.00117.07
8.0.250.0070.00717.11
8.0.240.0080.00617.10
8.0.230.0090.00517.07
8.0.220.0100.00416.96
8.0.210.0090.00617.03
8.0.200.0090.00617.07
8.0.190.0110.00317.00
8.0.180.0090.00417.05
8.0.170.0050.00817.11
8.0.160.0070.00517.04
8.0.150.0060.00617.01
8.0.140.0060.00717.01
8.0.130.0080.00516.10
8.0.120.0070.00617.09
8.0.110.0090.00417.06
8.0.100.0110.00217.08
8.0.90.0100.00317.09
8.0.80.0090.00617.11
8.0.70.0100.00517.11
8.0.60.0090.00517.11
8.0.50.0080.00516.92
8.0.30.0070.00817.08
8.0.20.0090.00717.16
8.0.10.0090.00417.21
8.0.00.0140.00417.15
7.4.330.0080.00516.25
7.4.320.0120.00216.80
7.4.300.0090.00716.83
7.4.290.0120.00416.72
7.4.280.0120.00416.84
7.4.270.0090.00816.79
7.4.260.0110.00515.95
7.4.250.0150.00316.81
7.4.240.0080.00716.71
7.4.230.0130.00416.85
7.4.220.0090.00516.70
7.4.210.0100.00716.71
7.4.200.0110.00516.81
7.4.190.0150.00416.95
7.4.180.0150.00417.00
7.4.160.0170.00316.84
7.4.150.0150.00316.82
7.4.140.0160.00217.09
7.4.130.0130.00816.76
7.4.120.0120.00716.76
7.4.110.0130.00616.68
7.4.100.0110.00816.72
7.4.90.0130.00516.66
7.4.80.0120.00617.10
7.4.70.0100.00716.61
7.4.60.0130.00516.68
7.4.50.0150.00416.48
7.4.40.0110.00716.66
7.4.30.0120.00916.70
7.4.20.0110.00616.65
7.4.10.0120.00616.63
7.4.00.0120.00616.42
7.3.330.0080.00716.53
7.3.320.0110.00415.79
7.3.310.0120.00416.54
7.3.300.0140.00216.59
7.3.290.0090.00716.57
7.3.280.0130.00516.59
7.3.270.0140.00416.65
7.3.260.0130.00716.54
7.3.250.0180.00116.64
7.3.240.0100.00816.48
7.3.230.0110.00716.61
7.3.220.0140.00516.68
7.3.210.0130.00616.53
7.3.200.0120.00616.51
7.3.190.0090.00916.49
7.3.180.0120.00716.53
7.3.170.0120.00716.41
7.3.160.0150.00416.57
7.3.150.0150.00416.57
7.3.140.0120.00616.51
7.3.130.0100.00816.49
7.3.120.0110.00716.38
7.3.110.0110.00816.06
7.3.100.0080.00815.99
7.3.90.0090.00715.79
7.3.80.0090.00815.75
7.3.70.0090.00815.66
7.3.60.0090.00715.67
7.3.50.0080.00915.73
7.3.40.0100.00615.70
7.3.30.0090.00715.68
7.3.20.0130.00615.88
7.3.10.0120.00915.88
7.3.00.0110.00716.07
7.2.340.0140.00416.71
7.2.330.0100.00816.71
7.2.320.0120.00716.66
7.2.310.0130.00516.58
7.2.300.0090.00916.63
7.2.290.0120.00716.73
7.2.280.0110.00716.66
7.2.270.0110.00816.68
7.2.260.0120.00816.67
7.2.250.0110.00916.63
7.2.240.0080.00916.27
7.2.230.0090.00816.21
7.2.220.0080.01015.79
7.2.210.0100.00715.87
7.2.200.0100.00715.85
7.2.190.0110.00615.84
7.2.180.0090.00815.84
7.2.170.0100.00715.86
7.2.160.0100.00715.90
7.2.150.0120.00616.23
7.2.140.0090.00916.24
7.2.130.0090.00916.28
7.2.120.0130.00716.31
7.2.110.0120.00816.24
7.2.100.0130.00616.21
7.2.90.0090.00916.26
7.2.80.0110.00716.30
7.2.70.0100.00816.24
7.2.60.0110.00716.21
7.2.50.0130.00716.24
7.2.40.0110.00716.32
7.2.30.0120.00616.19
7.2.20.0110.00916.27
7.2.10.0090.00916.25
7.2.00.0100.00816.19
7.1.330.0130.00615.53
7.1.320.0120.00615.19
7.1.310.0140.00715.23
7.1.300.0110.00815.17
7.1.290.0140.00815.21
7.1.280.0110.00815.27
7.1.270.0110.00715.16
7.1.260.0110.00815.19
7.1.250.0110.00815.21
7.1.240.0130.00716.07
7.1.230.0150.00615.96
7.1.220.0190.00716.05
7.1.210.0150.00516.04
7.1.200.0140.00615.99
7.1.190.0170.00516.05
7.1.180.0160.00515.95
7.1.170.0180.00816.06
7.1.160.0150.00615.96
7.1.150.0160.00716.04
7.1.140.0150.00716.03
7.1.130.0150.00615.76
7.1.120.0170.00615.76
7.1.110.0160.00715.73
7.1.100.0170.00815.79
7.1.90.0180.00715.65
7.1.80.0160.00815.81
7.1.70.0180.00615.68
7.1.60.0140.00815.73
7.1.50.0170.00615.76
7.1.40.0140.00815.76
7.1.30.0130.00815.77
7.1.20.0140.01015.84
7.1.10.0140.00915.68
7.1.00.0150.00815.64

preferences:
53.62 ms | 400 KiB | 5 Q