3v4l.org

run code in 300+ PHP versions simultaneously
<?php $json = array( "Sample" => array( "context" => 'ěščřžýáí' ) ); $encoded = json_encode($json); var_dump($encoded); $unescaped = preg_replace_callback('/\\\u(\w{4})/', function ($matches) { return html_entity_decode('&#x' . $matches[1] . ';', ENT_COMPAT, 'UTF-8'); }, $encoded); var_dump($unescaped);

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)
8.3.60.0150.00618.55
8.3.50.0100.01021.19
8.3.40.0110.00418.95
8.3.30.0090.00619.27
8.3.20.0040.00420.38
8.3.10.0030.00623.61
8.3.00.0000.00819.38
8.2.180.0110.00416.74
8.2.170.0120.00322.96
8.2.160.0040.01120.40
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0040.00426.16
8.2.120.0040.00422.14
8.2.110.0000.01021.11
8.2.100.0000.01217.75
8.2.90.0040.00419.26
8.2.80.0000.00817.97
8.2.70.0090.00017.88
8.2.60.0090.00018.05
8.2.50.0060.00318.07
8.2.40.0040.00418.34
8.2.30.0000.00718.14
8.2.20.0000.00817.91
8.2.10.0000.00718.07
8.2.00.0080.00018.04
8.1.280.0110.01125.92
8.1.270.0000.00823.71
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0030.00623.97
8.1.230.0080.00419.14
8.1.220.0040.00417.74
8.1.210.0000.00918.77
8.1.200.0030.00617.47
8.1.190.0040.00417.47
8.1.180.0090.00018.10
8.1.170.0030.00620.36
8.1.160.0040.00421.95
8.1.150.0040.00418.93
8.1.140.0000.00817.61
8.1.130.0040.00417.79
8.1.120.0050.00217.70
8.1.110.0000.00817.60
8.1.100.0040.00317.58
8.1.90.0000.00817.66
8.1.80.0040.00417.57
8.1.70.0020.00517.51
8.1.60.0080.00317.63
8.1.50.0060.00317.72
8.1.40.0050.00317.72
8.1.30.0090.00017.80
8.1.20.0040.00417.78
8.1.10.0030.00617.76
8.1.00.0040.00417.64
8.0.300.0000.00718.77
8.0.290.0000.00716.88
8.0.280.0030.00318.39
8.0.270.0050.00317.26
8.0.260.0030.00317.21
8.0.250.0030.00317.13
8.0.240.0030.00317.08
8.0.230.0050.00217.05
8.0.220.0000.00717.10
8.0.210.0070.00017.12
8.0.200.0040.00417.13
8.0.190.0040.00417.04
8.0.180.0000.00717.14
8.0.170.0030.00517.02
8.0.160.0040.00416.97
8.0.150.0000.00716.86
8.0.140.0070.00017.04
8.0.130.0000.00513.53
8.0.120.0050.00316.95
8.0.110.0040.00416.98
8.0.100.0070.00016.89
8.0.90.0000.00717.05
8.0.80.0090.00616.99
8.0.70.0000.00716.94
8.0.60.0070.00017.12
8.0.50.0000.00817.05
8.0.30.0120.00617.16
8.0.20.0120.01017.46
8.0.10.0000.00717.05
8.0.00.0110.00616.81
7.4.330.0050.00315.02
7.4.320.0040.00416.85
7.4.300.0000.00716.64
7.4.290.0050.00216.88
7.4.280.0000.00816.67
7.4.270.0030.00316.59
7.4.260.0000.00716.79
7.4.250.0040.00416.68
7.4.240.0040.00416.79
7.4.230.0030.00316.64
7.4.220.0060.01216.74
7.4.210.0090.00616.78
7.4.200.0070.00016.83
7.4.160.0090.00916.77
7.4.150.0070.01017.40
7.4.140.0070.01117.86
7.4.130.0100.00916.70
7.4.120.0110.00916.75
7.4.110.0080.00916.84
7.4.100.0070.01016.66
7.4.90.0100.00716.86
7.4.80.0080.01219.39
7.4.70.0090.01316.65
7.4.60.0030.01316.63
7.4.50.0060.00016.54
7.4.40.0170.00016.73
7.4.30.0150.00916.73
7.4.00.0070.00715.36
7.3.330.0030.00413.27
7.3.320.0050.00013.28
7.3.310.0000.00716.36
7.3.300.0030.00316.34
7.3.290.0120.00616.35
7.3.280.0100.00916.41
7.3.270.0090.00917.40
7.3.260.0070.01116.40
7.3.250.0080.00816.52
7.3.240.0030.01316.56
7.3.230.0100.00716.39
7.3.210.0120.00916.43
7.3.200.0080.00819.39
7.3.190.0100.01316.80
7.3.180.0090.00616.52
7.3.170.0060.01016.47
7.3.160.0060.00916.83
7.3.10.0040.00716.49
7.3.00.0030.00916.52
7.2.330.0090.01016.94
7.2.320.0070.01016.75
7.2.310.0100.00716.96
7.2.300.0120.00416.63
7.2.290.0150.00916.63
7.2.130.0030.01016.76
7.2.120.0030.00916.91
7.2.110.0100.00316.93
7.2.100.0070.00716.79
7.2.90.0040.00717.04
7.2.80.0090.00316.79
7.2.70.0040.00817.00
7.2.60.0020.01216.97
7.2.50.0160.00016.96
7.2.40.0070.00716.96
7.2.30.0030.01317.14
7.2.20.0120.00017.09
7.2.10.0040.00817.18
7.2.00.0030.00918.26
7.1.250.0030.01015.89
7.1.200.0060.00315.75
7.1.100.0030.00718.49
7.1.70.0090.00017.33
7.1.60.0100.01419.32
7.1.50.0210.01435.03
7.1.00.0000.08022.37
7.0.200.0030.00616.96
7.0.140.0030.07322.15
7.0.90.0170.07719.96
7.0.80.0030.08020.00
7.0.70.0100.08719.81
7.0.60.0130.07019.84
7.0.50.0100.05020.39
7.0.40.0070.05720.07
7.0.30.0100.07320.05
7.0.20.0100.06720.18
7.0.10.0170.07020.16
7.0.00.0100.07719.98
5.6.280.0000.07721.18
5.6.240.0070.07320.64
5.6.230.0130.07320.61
5.6.220.0000.06720.44
5.6.210.0030.04320.59
5.6.200.0170.07320.97
5.6.190.0070.08321.04
5.6.180.0200.07721.04
5.6.170.0000.08321.13
5.6.160.0070.05321.11
5.6.150.0100.08320.95
5.6.140.0070.04321.02
5.6.130.0030.08720.95
5.6.120.0070.08721.00
5.6.110.0030.04721.04
5.6.100.0070.08320.92
5.6.90.0100.03721.00
5.6.80.0130.08020.42
5.6.70.0070.07720.52
5.6.60.0170.07320.33
5.6.50.0030.08020.43
5.6.40.0130.07020.29
5.6.30.0130.07020.46
5.6.20.0100.04020.43
5.6.10.0030.04720.38
5.6.00.0000.04320.45
5.5.380.0000.06020.30
5.5.370.0070.08020.31
5.5.360.0000.05020.44
5.5.350.0100.04020.38
5.5.340.0100.06020.87
5.5.330.0130.07320.84
5.5.320.0130.07720.86
5.5.310.0100.04720.83
5.5.300.0100.04320.91
5.5.290.0030.09020.93
5.5.280.0070.06020.77
5.5.270.0170.07720.88
5.5.260.0030.04320.85
5.5.250.0070.04020.62
5.5.240.0130.04320.18
5.5.230.0070.04720.26
5.5.220.0030.08320.20
5.5.210.0100.08020.25
5.5.200.0130.07020.28
5.5.190.0030.07320.22
5.5.180.0070.07720.13
5.5.160.0070.08020.23
5.5.150.0130.07020.17
5.5.140.0070.05020.23
5.5.130.0130.06720.27
5.5.120.0070.07720.19
5.5.110.0230.02020.26
5.5.100.0130.07720.06
5.5.90.0000.04320.07
5.5.80.0070.04320.09
5.5.70.0030.08320.09
5.5.60.0070.07720.05
5.5.50.0100.07020.09
5.5.40.0070.07319.90
5.5.30.0100.04020.14
5.5.20.0070.07720.03
5.5.10.0130.07720.07
5.5.00.0200.07020.02
5.4.450.0100.08019.36
5.4.440.0100.07719.45
5.4.430.0130.07319.50
5.4.420.0070.05019.35
5.4.410.0030.04719.32
5.4.400.0170.06019.13
5.4.390.0100.05319.18
5.4.380.0100.07319.00
5.4.370.0070.05719.14
5.4.360.0030.07318.89
5.4.350.0030.05719.12
5.4.340.0030.07719.04
5.4.320.0030.07019.21
5.4.310.0100.04319.05
5.4.300.0130.07018.91
5.4.290.0100.07319.09
5.4.280.0100.08019.15
5.4.270.0100.04019.07
5.4.260.0170.06719.09
5.4.250.0030.04318.87
5.4.240.0030.06019.15
5.4.230.0130.07019.04
5.4.220.0030.05019.02
5.4.210.0070.05019.02
5.4.200.0030.07319.04
5.4.190.0100.04718.95
5.4.180.0030.07718.87
5.4.170.0070.07719.15
5.4.160.0070.07319.10
5.4.150.0030.08018.92
5.4.140.0130.06716.38
5.4.130.0000.08016.28
5.4.120.0100.07016.43
5.4.110.0100.07316.46
5.4.100.0100.07316.43
5.4.90.0100.07316.51
5.4.80.0100.06716.38
5.4.70.0070.07016.38
5.4.60.0130.05316.46
5.4.50.0070.04716.24
5.4.40.0130.07016.46
5.4.30.0100.06316.44
5.4.20.0070.06716.29
5.4.10.0030.08016.39
5.4.00.0000.08015.86
5.3.290.0070.04314.80
5.3.280.0030.07714.74
5.3.270.0130.06314.64
5.3.260.0070.06014.54
5.3.250.0070.05714.61
5.3.240.0100.07014.57
5.3.230.0030.06714.71
5.3.220.0070.07314.65
5.3.210.0130.07014.61
5.3.200.0030.08014.50
5.3.190.0170.04714.62
5.3.180.0100.07714.50
5.3.170.0070.05014.54
5.3.160.0070.04314.70
5.3.150.0000.08014.67
5.3.140.0100.07314.61
5.3.130.0100.05014.69
5.3.120.0030.05714.65
5.3.110.0070.05314.69
5.3.100.0170.06713.98
5.3.90.0100.06714.13
5.3.80.0100.07014.11
5.3.70.0070.07314.13
5.3.60.0170.06014.00
5.3.50.0000.08013.96
5.3.40.0070.07314.01
5.3.30.0030.07713.89
5.3.20.0070.07013.72
5.3.10.0000.05013.64
5.3.00.0070.07013.66
5.2.170.0000.06711.16
5.2.160.0070.05011.10
5.2.150.0030.04011.06
5.2.140.0100.04011.15
5.2.130.0030.05310.95
5.2.120.0030.05711.13
5.2.110.0030.06711.15
5.2.100.0030.03311.10
5.2.90.0070.05710.89
5.2.80.0000.06711.14
5.2.70.0030.06311.04
5.2.60.0030.06311.11
5.2.50.0000.07011.09
5.2.40.0200.04710.83
5.2.30.0070.06010.96
5.2.20.0030.06310.81
5.2.10.0030.04710.91
5.2.00.0070.06010.64
5.1.60.0070.04010.05
5.1.50.0030.0539.95
5.1.40.0100.04710.01
5.1.30.0000.05010.21
5.1.20.0070.05010.35
5.1.10.0000.06010.11
5.1.00.0030.05710.10
5.0.50.0000.0438.56
5.0.40.0100.0308.44
5.0.30.0030.0678.27
5.0.20.0070.0338.04
5.0.10.0100.0378.25
5.0.00.0070.0538.27
4.4.90.0030.0336.73
4.4.80.0070.0276.73
4.4.70.0100.0276.73
4.4.60.0030.0336.73
4.4.50.0000.0376.73
4.4.40.0070.0476.73
4.4.30.0000.0276.73
4.4.20.0070.0276.73
4.4.10.0100.0276.73
4.4.00.0030.0436.73
4.3.110.0000.0236.73
4.3.100.0070.0236.73
4.3.90.0030.0336.73
4.3.80.0000.0536.73
4.3.70.0030.0336.73
4.3.60.0000.0276.73
4.3.50.0030.0336.73
4.3.40.0030.0376.73
4.3.30.0000.0236.73
4.3.20.0000.0376.73
4.3.10.0030.0336.73
4.3.00.0070.0336.73

preferences:
41.97 ms | 401 KiB | 5 Q