3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isJson2($string) { try { json_decode($string); } catch (ErrorException $e) { return FALSE; } return (json_last_error() == JSON_ERROR_NONE); } /** * Checks whether a string is valid JSON. * * @param string $string * @return boolean */ function isJson($string) { // Make sure the string is not empty and whether it is a string. if(!empty($string) && is_string($string)) { json_decode($string); return (json_last_error() == JSON_ERROR_NONE); } return false; } $a=['arraiii'=>['dentro'=>234]]; $b=json_encode($a); $c=''; var_dump(isJson($b));

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)
8.3.60.0120.00318.18
8.3.50.0120.01021.08
8.3.40.0140.00018.77
8.3.30.0070.00720.21
8.3.20.0050.00320.39
8.3.10.0040.00421.95
8.3.00.0040.00422.49
8.2.180.0040.01116.75
8.2.170.0030.01022.96
8.2.160.0100.00322.07
8.2.150.0080.00024.18
8.2.140.0030.00524.66
8.2.130.0000.00726.16
8.2.120.0040.00420.75
8.2.110.0060.00322.22
8.2.100.0050.00517.91
8.2.90.0040.00419.09
8.2.80.0000.00719.16
8.2.70.0060.00317.63
8.2.60.0050.00317.93
8.2.50.0040.00418.07
8.2.40.0040.00418.28
8.2.30.0000.00719.55
8.2.20.0040.00417.54
8.2.10.0000.00717.67
8.2.00.0020.00517.74
8.1.280.0070.01125.92
8.1.270.0070.00023.99
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.82
8.1.230.0040.00719.15
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0090.00317.35
8.1.190.0040.00417.53
8.1.180.0080.00018.10
8.1.170.0040.00418.48
8.1.160.0050.00218.94
8.1.150.0000.00818.59
8.1.140.0050.00217.46
8.1.130.0030.00317.93
8.1.120.0000.00717.47
8.1.110.0050.00217.42
8.1.100.0000.00717.40
8.1.90.0040.00417.45
8.1.80.0000.00817.45
8.1.70.0030.00317.43
8.1.60.0040.00417.58
8.1.50.0040.00417.58
8.1.40.0040.00417.53
8.1.30.0000.00717.59
8.1.20.0040.00417.49
8.1.10.0050.00217.41
8.1.00.0040.00717.45
8.0.300.0070.00018.77
8.0.290.0040.00417.05
8.0.280.0000.00718.32
8.0.270.0030.00317.19
8.0.260.0030.00316.72
8.0.250.0030.00316.95
8.0.240.0030.00516.96
8.0.230.0030.00316.98
8.0.220.0030.00316.80
8.0.210.0000.00816.87
8.0.200.0030.00316.94
8.0.190.0000.00716.97
8.0.180.0060.00316.95
8.0.170.0000.00816.80
8.0.160.0030.00316.77
8.0.150.0080.00316.77
8.0.140.0040.00416.88
8.0.130.0050.00013.20
8.0.120.0040.00416.88
8.0.110.0040.00416.75
8.0.100.0030.00316.68
8.0.90.0090.00016.72
8.0.80.0090.00616.84
8.0.70.0080.00016.88
8.0.60.0000.00716.95
8.0.50.0000.00716.92
8.0.30.0070.01217.17
8.0.20.0110.01517.40
8.0.10.0000.00816.91
8.0.00.0100.00916.75
7.4.330.0050.00015.00
7.4.320.0000.00916.58
7.4.300.0060.00016.59
7.4.290.0070.00016.48
7.4.280.0070.00016.40
7.4.270.0000.00616.63
7.4.260.0030.00313.29
7.4.250.0040.00416.45
7.4.240.0070.00016.54
7.4.230.0030.00316.70
7.4.220.0040.01516.70
7.4.210.0090.00616.51
7.4.200.0030.00316.43
7.4.190.0000.00716.73
7.4.160.0080.00816.45
7.4.150.0190.00517.40
7.4.140.0080.01017.86
7.4.130.0110.00816.50
7.4.120.0140.00716.61
7.4.110.0080.01516.43
7.4.100.0090.01216.52
7.4.90.0080.01216.52
7.4.80.0070.01119.39
7.4.70.0170.00016.63
7.4.60.0110.00516.38
7.4.50.0060.00316.44
7.4.40.0040.00822.77
7.4.30.0190.00416.62
7.4.00.0090.00614.68
7.3.330.0000.00513.19
7.3.320.0000.00513.17
7.3.310.0020.00516.23
7.3.300.0060.00016.24
7.3.290.0090.00616.22
7.3.280.0070.01116.20
7.3.270.0070.01317.40
7.3.260.0160.00316.45
7.3.250.0070.01116.40
7.3.240.0140.01116.41
7.3.230.0060.01116.59
7.3.210.0060.01016.34
7.3.200.0040.01319.39
7.3.190.0090.01216.45
7.3.180.0170.00016.27
7.3.170.0130.00316.48
7.3.160.0130.00416.46
7.3.120.0070.00714.83
7.2.330.0060.01316.56
7.2.320.0130.01016.59
7.2.310.0100.00616.72
7.2.300.0030.01316.32
7.2.290.0160.00316.54
7.2.60.0000.00916.93
7.2.00.0070.01019.44
7.1.200.0090.00415.50
7.1.100.0110.00718.11
7.1.70.0000.00717.09
7.1.60.0100.01419.32
7.1.50.0070.01416.64
7.1.00.0030.03322.51
7.0.200.0030.00716.82
7.0.140.0070.06721.96
7.0.90.0200.03319.91
7.0.80.0070.06019.93
7.0.70.0570.08719.84
7.0.60.0570.07019.82
7.0.50.0600.05720.31
7.0.40.0100.08020.07
7.0.30.0070.08020.08
7.0.20.0000.08020.10
7.0.10.0070.06020.18
7.0.00.0130.07320.05
5.6.280.0000.07720.98
5.6.240.0030.04720.62
5.6.230.0130.05720.58
5.6.220.0100.07320.60
5.6.210.0100.07320.53
5.6.200.0000.08320.95
5.6.190.0170.07321.01
5.6.180.0070.07721.08
5.6.170.0170.06321.05
5.6.160.0030.08720.94
5.6.150.0000.05720.96
5.6.140.0070.04321.11
5.6.130.0070.04721.11
5.6.120.0030.04321.08
5.6.110.0100.04721.02
5.6.100.0030.05021.07
5.6.90.0100.03720.96
5.6.80.0030.04020.41
5.6.70.0000.04320.40
5.6.60.0100.03320.45
5.6.50.0000.04320.38
5.6.40.0030.04020.36
5.6.30.0100.04720.32
5.6.20.0070.03320.40
5.6.10.0030.03720.37
5.6.00.0100.05320.42
5.5.380.0030.07720.29
5.5.370.0070.04720.41
5.5.360.0100.04720.34
5.5.350.0030.09020.34
5.5.340.0130.07720.85
5.5.330.0100.08320.88
5.5.320.0070.04020.84
5.5.310.0070.07020.78
5.5.300.0130.05020.80
5.5.290.0030.04320.73
5.5.280.0070.06720.76
5.5.270.0030.04320.88
5.5.260.0130.03320.73
5.5.250.0030.04320.62
5.5.240.0070.04020.12
5.5.230.0000.05020.28
5.5.220.0070.03720.26
5.5.210.0070.03720.25
5.5.200.0070.03720.11
5.5.190.0100.09020.28
5.5.180.0100.07020.28
5.5.160.0030.04020.09
5.5.150.0070.05320.27
5.5.140.0030.05320.27
5.5.130.0070.03720.21
5.5.120.0030.04020.24
5.5.110.0000.04320.15
5.5.100.0030.04020.07
5.5.90.0000.04319.95
5.5.80.0070.03720.10
5.5.70.0000.04319.91
5.5.60.0100.03020.07
5.5.50.0070.03720.00
5.5.40.0000.04020.05
5.5.30.0130.03320.05
5.5.20.0030.04319.96
5.5.10.0070.03320.08
5.5.00.0030.03720.09
5.4.450.0030.04719.45
5.4.440.0200.04319.37
5.4.430.0000.04319.46
5.4.420.0000.04319.27
5.4.410.0070.06719.23
5.4.400.0030.04019.04
5.4.390.0000.04019.09
5.4.380.0100.03019.09
5.4.370.0000.04319.25
5.4.360.0130.07019.16
5.4.350.0030.03318.85
5.4.340.0030.05019.10
5.4.320.0100.06018.88
5.4.310.0070.03319.21
5.4.300.0030.03719.03
5.4.290.0070.03718.90
5.4.280.0070.05719.20
5.4.270.0030.03718.90
5.4.260.0000.04019.23
5.4.250.0100.03719.16
5.4.240.0030.04019.04
5.4.230.0030.04018.91
5.4.220.0070.03719.24
5.4.210.0070.03319.24
5.4.200.0000.04019.02
5.4.190.0100.03319.22
5.4.180.0000.04019.02
5.4.170.0030.03719.20
5.4.160.0000.04018.93
5.4.150.0000.04719.02
5.4.140.0070.03316.35
5.4.130.0030.03716.50
5.4.120.0030.03016.44
5.4.110.0070.03316.42
5.4.100.0030.04716.56
5.4.90.0030.05316.42
5.4.80.0000.03716.51
5.4.70.0030.03716.51
5.4.60.0070.03316.36
5.4.50.0030.03716.48
5.4.40.0030.03716.55
5.4.30.0030.03716.46
5.4.20.0070.05316.40
5.4.10.0030.04316.44
5.4.00.0030.07715.89
5.3.290.0030.04014.68
5.3.280.0030.03714.52
5.3.270.0030.03714.64
5.3.260.0070.04014.53
5.3.250.0030.04014.61
5.3.240.0030.03714.62
5.3.230.0030.04014.69
5.3.220.0030.03714.52
5.3.210.0030.03714.71
5.3.200.0000.04014.63
5.3.190.0000.04014.69
5.3.180.0000.04014.58
5.3.170.0030.03714.69
5.3.160.0070.05714.63
5.3.150.0030.04714.71
5.3.140.0030.03714.58
5.3.130.0000.04014.66
5.3.120.0170.02714.61
5.3.110.0100.07014.52
5.3.100.0070.04714.03
5.3.90.0030.03714.16
5.3.80.0070.04313.95
5.3.70.0030.06014.07
5.3.60.0170.06014.03
5.3.50.0070.04714.04
5.3.40.0100.04314.04
5.3.30.0130.06714.00
5.3.20.0070.05713.63
5.3.10.0130.04313.69
5.3.00.0130.06713.57
5.2.170.0030.06311.05
5.2.160.0070.06011.16
5.2.150.0070.06011.06
5.2.140.0100.05711.07
5.2.130.0000.03311.15
5.2.120.0030.03011.11
5.2.110.0000.04010.99
5.2.100.0070.06311.00
5.2.90.0100.06011.16
5.2.80.0070.06311.13
5.2.70.0000.06311.21
5.2.60.0030.06310.94
5.2.50.0100.04711.07
5.2.40.0030.05711.13
5.2.30.0000.06311.07
5.2.20.0030.04710.97
5.2.10.0070.05310.89
5.2.00.0030.03310.75
5.1.60.0100.01710.58
5.1.50.0030.05310.58
5.1.40.0070.03310.58
5.1.30.0100.04710.58
5.1.20.0030.03310.58
5.1.10.0000.06010.58
5.1.00.0100.04010.58
5.0.50.0030.03310.58
5.0.40.0070.04310.58
5.0.30.0030.06310.58
5.0.20.0030.04310.58
5.0.10.0070.04010.58
5.0.00.0030.06310.58
4.4.90.0000.04010.58
4.4.80.0000.02710.58
4.4.70.0070.03310.58
4.4.60.0000.02010.58
4.4.50.0000.03710.58
4.4.40.0030.05310.58
4.4.30.0030.03310.58
4.4.20.0000.02310.58
4.4.10.0070.03310.58
4.4.00.0070.05010.58
4.3.110.0070.03010.58
4.3.100.0030.03710.58
4.3.90.0030.03010.58
4.3.80.0000.05710.58
4.3.70.0000.03710.58
4.3.60.0070.03010.58
4.3.50.0030.03310.58
4.3.40.0030.05010.58
4.3.30.0070.03010.58
4.3.20.0070.03010.58
4.3.10.0030.02710.58
4.3.00.0030.03010.58

preferences:
46.45 ms | 401 KiB | 5 Q