3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classes = get_declared_classes(); $implementsIface = array(); foreach($classes as $klass) { $reflect = new ReflectionClass($klass); if($reflect->implementsInterface('JsonSerializable')) $implementsIface [] = $klass; } print_r($implementsIface)

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)
5.4.340.0060.03411.98
5.4.320.0070.03812.47
5.4.310.0040.04512.46
5.4.300.0080.04012.47
5.4.290.0070.04112.46
5.4.280.0130.02912.36
5.4.270.0070.03612.36
5.4.260.0020.04112.36
5.4.250.0060.03812.36
5.4.240.0070.04012.36
5.4.230.0080.03712.35
5.4.220.0060.03812.35
5.4.210.0040.03812.35
5.4.200.0050.04512.36
5.4.190.0070.03912.35
5.4.180.0040.05312.35
5.4.170.0030.04412.36
5.4.160.0060.04112.36
5.4.150.0060.03612.36
5.4.140.0060.04112.04
5.4.130.0090.03712.03
5.4.120.0050.03811.99
5.4.110.0070.03911.98
5.4.100.0080.04011.98
5.4.90.0030.04011.99
5.4.80.0080.03611.98
5.4.70.0040.03811.98
5.4.60.0060.03511.98
5.4.50.0080.03911.98
5.4.40.0070.03511.96
5.4.30.0100.03111.96
5.4.20.0070.03811.96
5.4.10.0050.03711.96
5.4.00.0080.04011.45
5.3.290.0050.04312.80
5.3.280.0090.04012.71
5.3.270.0050.04012.72
5.3.260.0070.03812.72
5.3.250.0060.03612.72
5.3.240.0050.03812.71
5.3.230.0050.03912.71
5.3.220.0060.03812.68
5.3.210.0090.03812.68
5.3.200.0080.03612.68
5.3.190.0050.04012.67
5.3.180.0050.04812.67
5.3.170.0040.04612.67
5.3.160.0030.03912.68
5.3.150.0070.03712.67
5.3.140.0060.03712.66
5.3.130.0040.04612.66
5.3.120.0070.05112.66
5.3.110.0080.05112.66
5.3.100.0090.04612.12
5.3.90.0040.03812.08
5.3.80.0090.03712.07
5.3.70.0050.03812.07
5.3.60.0060.03612.06
5.3.50.0060.03612.00
5.3.40.0050.03712.00
5.3.30.0060.05111.95
5.3.20.0110.05011.73
5.3.10.0040.04311.70
5.3.00.0050.03611.68
5.2.170.0060.0309.18
5.2.160.0070.0299.19
5.2.150.0080.0299.19
5.2.140.0060.0309.18
5.2.130.0080.0379.14
5.2.120.0060.0369.14
5.2.110.0010.0329.15
5.2.100.0030.0299.14
5.2.90.0040.0369.14
5.2.80.0050.0299.14
5.2.70.0030.0309.14
5.2.60.0060.0319.09
5.2.50.0030.0339.06
5.2.40.0060.0369.04
5.2.30.0020.0339.02
5.2.20.0030.0329.01
5.2.10.0020.0318.93
5.2.00.0070.0328.78
5.1.60.0050.0238.07
5.1.50.0100.0328.07
5.1.40.0050.0268.05
5.1.30.0040.0268.40
5.1.20.0080.0248.42
5.1.10.0060.0268.14
5.1.00.0060.0248.14
5.0.50.0030.0226.63
5.0.40.0040.0196.48
5.0.30.0040.0306.30
5.0.20.0060.0166.27
5.0.10.0030.0236.25
5.0.00.0040.0296.24
4.4.90.0020.0164.77
4.4.80.0040.0154.75
4.4.70.0040.0174.75
4.4.60.0050.0174.76
4.4.50.0040.0164.77
4.4.40.0030.0264.71
4.4.30.0030.0154.76
4.4.20.0020.0174.84
4.4.10.0040.0154.85
4.4.00.0030.0254.76
4.3.110.0020.0164.66
4.3.100.0010.0174.67
4.3.90.0030.0164.63
4.3.80.0040.0234.59
4.3.70.0020.0154.63
4.3.60.0040.0134.63
4.3.50.0060.0144.63
4.3.40.0020.0264.54
4.3.30.0010.0233.28
4.3.20.0030.0203.27
4.3.10.0030.0193.22
4.3.00.0030.0237.00

preferences:
141.66 ms | 1394 KiB | 7 Q