3v4l.org

run code in 300+ PHP versions simultaneously
<?php $rose = "black"; ${"rose"} = "white"; $rose = "red"; print_r(${"rose"}); echo "\n\n"; /** Parse error: syntax error, unexpected '123' (T_LNUMBER), expecting variable (T_VARIABLE) or '{' or '$' $123 = 456; var_dump($123); **/ ${"123"} = "white"; var_dump(${"123"}); echo '<PRE>';var_dump(get_defined_vars()); if( array_key_exists( '"123"',get_defined_vars() ) ){ echo "'123' in array"; } else { echo "'123' NOT in array"; } echo "\n\n"; $arr{"246a"} = 99; var_dump($arr); $o = (object) $arr; var_dump($o); echo $o->{"246a"},"\n\n"; class x extends stdClass { public $val; function Show($n){ $this->val = $n; return $this->val; } } $s = new x(); echo $s->Show(100),"\n"; var_dump($s); var_dump($s instanceof stdClass);

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)
8.3.70.0100.00718.43
8.3.60.0040.01218.40
8.3.50.0130.00621.09
8.3.40.0150.00018.59
8.3.30.0100.00319.01
8.3.20.0040.00420.34
8.3.10.0030.00623.69
8.3.00.0000.00819.13
8.2.180.0140.00716.50
8.2.170.0140.00422.96
8.2.160.0140.00319.04
8.2.150.0050.00224.18
8.2.140.0080.00024.66
8.2.130.0060.00326.16
8.2.120.0040.00422.05
8.2.110.0050.00320.54
8.2.100.0120.00017.91
8.2.90.0080.00019.09
8.2.80.0040.00417.97
8.2.70.0040.00417.38
8.2.60.0100.00017.91
8.2.50.0050.00318.07
8.2.40.0050.00519.95
8.2.30.0040.00417.81
8.2.20.0040.00417.55
8.2.10.0070.00018.00
8.2.00.0040.00417.44
8.1.280.0070.00725.92
8.1.270.0050.00322.14
8.1.260.0050.00326.35
8.1.250.0050.00228.09
8.1.240.0030.00623.70
8.1.230.0070.00418.98
8.1.220.0080.00017.74
8.1.210.0030.00618.77
8.1.200.0040.00416.88
8.1.190.0000.00917.10
8.1.180.0050.00318.10
8.1.170.0040.00418.52
8.1.160.0070.00021.95
8.1.150.0030.00618.75
8.1.140.0000.00717.28
8.1.130.0030.00317.68
8.1.120.0070.00017.40
8.1.110.0000.00717.35
8.1.100.0040.00417.32
8.1.90.0000.00717.30
8.1.80.0050.00217.22
8.1.70.0000.00717.20
8.1.60.0080.00017.49
8.1.50.0040.00417.30
8.1.40.0050.00317.27
8.1.30.0030.00617.47
8.1.20.0040.00417.47
8.1.10.0000.00917.28
8.1.00.0060.00317.32
8.0.300.0050.00218.77
8.0.290.0040.00416.75
8.0.280.0000.00718.33
8.0.270.0040.00417.13
8.0.260.0000.00717.05
8.0.250.0000.00716.87
8.0.240.0000.00816.82
8.0.230.0050.00216.82
8.0.220.0040.00416.89
8.0.210.0070.00016.75
8.0.200.0030.00316.95
8.0.190.0040.00416.88
8.0.180.0000.00716.89
8.0.170.0000.00716.72
8.0.160.0040.00416.88
8.0.150.0040.00416.79
8.0.140.0000.00716.67
8.0.130.0000.00513.30
8.0.120.0040.00416.80
8.0.110.0040.00416.88
8.0.100.0040.00316.71
8.0.90.0000.00816.68
8.0.80.0070.01016.76
8.0.70.0000.00716.85
8.0.60.0050.00316.80
8.0.50.0090.00016.63
8.0.30.0140.00516.99
8.0.20.0130.00817.40
8.0.10.0070.00016.83
8.0.00.0050.01416.56
7.4.330.0000.00515.00
7.4.320.0000.00616.48
7.4.300.0030.00316.48
7.4.290.0030.00316.49
7.4.280.0070.00016.63
7.4.270.0030.00316.60
7.4.260.0030.00316.54
7.4.250.0000.00816.45
7.4.240.0020.00616.52
7.4.230.0040.00416.60
7.4.220.0130.00616.63
7.4.210.0000.01616.46
7.4.200.0040.00316.71
7.4.160.0180.00016.57
7.4.150.0120.01217.40
7.4.140.0100.00917.86
7.4.130.0120.01016.62
7.4.120.0100.00816.61
7.4.110.0100.00716.50
7.4.100.0100.01016.50
7.4.90.0130.00716.57
7.4.80.0110.01219.39
7.4.70.0000.01716.50
7.4.60.0090.00816.46
7.4.50.0020.01116.39
7.4.40.0090.00616.20
7.4.30.0110.00816.41
7.4.20.0050.01316.51
7.4.10.0070.01016.54
7.4.00.0070.01015.38
7.3.330.0000.00613.31
7.3.320.0060.00013.39
7.3.310.0070.00016.18
7.3.300.0000.00616.28
7.3.290.0110.00416.33
7.3.280.0120.00816.30
7.3.270.0170.01017.40
7.3.260.0130.01016.39
7.3.250.0110.01116.31
7.3.240.0070.01716.67
7.3.230.0100.01016.50
7.3.210.0110.00716.45
7.3.200.0030.01719.39
7.3.190.0130.01016.60
7.3.180.0100.01016.50
7.3.170.0070.01016.55
7.3.160.0100.00716.54
7.3.150.0030.01616.18
7.3.140.0170.00016.26
7.3.130.0100.00716.48
7.3.120.0060.01215.23
7.3.110.0050.01215.13
7.3.100.0090.00815.32
7.3.90.0080.00715.30
7.3.80.0060.01015.27
7.3.70.0050.01115.44
7.3.60.0090.00515.44
7.3.50.0060.00915.18
7.3.40.0060.00915.33
7.3.30.0080.00915.27
7.3.20.0060.01016.55
7.3.10.0070.00916.67
7.3.00.0070.00716.57
7.2.330.0080.01116.77
7.2.320.0110.00816.59
7.2.310.0130.00716.88
7.2.300.0060.01216.67
7.2.290.0030.01616.75
7.2.280.0070.01116.70
7.2.270.0060.01216.66
7.2.260.0000.01716.77
7.2.250.0090.01015.59
7.2.240.0080.01115.73
7.2.230.0090.00815.42
7.2.220.0070.00915.70
7.2.210.0060.01215.44
7.2.200.0080.00715.51
7.2.190.0130.00215.58
7.2.180.0040.01215.45
7.2.170.0070.00715.56
7.2.160.0070.01216.56
7.2.150.0070.01116.74
7.2.140.0120.00616.63
7.2.130.0080.01016.70
7.2.120.0220.00016.68
7.2.110.0090.01016.59
7.2.100.0060.01216.60
7.2.90.0040.01516.73
7.2.80.0030.01516.63
7.2.70.0040.01416.60
7.2.60.0100.00716.65
7.2.50.0090.00916.46
7.2.40.0070.01116.68
7.2.30.0070.01116.71
7.2.20.0040.01516.58
7.2.10.0130.01016.61
7.2.00.0110.00318.04
7.1.330.0050.01115.84
7.1.320.0040.01015.61
7.1.310.0160.00515.78
7.1.300.0070.00815.66
7.1.290.0090.01215.57
7.1.280.0030.01115.72
7.1.270.0070.01015.65
7.1.260.0060.00715.79
7.1.250.0080.01015.48
7.1.240.0030.01615.32
7.1.230.0140.00715.66
7.1.220.0090.01215.47
7.1.210.0070.01015.52
7.1.200.0050.01015.71
7.1.190.0120.00615.39
7.1.180.0110.00815.28
7.1.170.0090.00915.51
7.1.160.0090.00615.50
7.1.150.0080.00815.48
7.1.140.0040.01215.61
7.1.130.0110.00515.26
7.1.120.0120.00415.58
7.1.110.0040.01215.55
7.1.100.0090.00616.93
7.1.90.0110.01115.70
7.1.80.0080.00815.45
7.1.70.0090.00716.42
7.1.60.0070.01117.29
7.1.50.0050.01416.22
7.1.40.0040.01115.52
7.1.30.0090.00615.60
7.1.20.0060.00915.57
7.1.10.0090.00615.72
7.1.00.0090.04118.96
7.0.330.0080.00815.25
7.0.320.0260.00315.06
7.0.310.0090.00615.29
7.0.300.0200.00015.17
7.0.290.0090.00615.29
7.0.280.0080.00715.30
7.0.270.0100.00515.23
7.0.260.0080.00815.29
7.0.250.0060.00915.24
7.0.240.0090.00615.23
7.0.230.0060.00915.41
7.0.220.0080.00815.25
7.0.210.0120.00915.41
7.0.200.0070.00816.01
7.0.190.0030.01015.24
7.0.180.0070.00715.25
7.0.170.0090.00915.22
7.0.160.0070.01015.25
7.0.150.0100.00715.20
7.0.140.0050.04318.66
7.0.130.0050.01115.37
7.0.120.0090.00615.26
7.0.110.0130.00315.10
7.0.100.0090.00615.19
7.0.90.0120.00615.23
7.0.80.0140.00615.23
7.0.70.0120.00315.17
7.0.60.0100.04717.62
7.0.50.0070.04716.58
7.0.40.0130.03017.63
7.0.30.0230.04517.68
7.0.20.0220.04217.64
7.0.10.0030.03017.60
7.0.00.0100.04517.70
5.6.400.0040.01415.95
5.6.390.0090.01416.08
5.6.380.0070.01415.84
5.6.370.0060.01216.15
5.6.360.0040.01515.99
5.6.350.0140.00516.17
5.6.340.0060.01316.13
5.6.330.0110.00816.15
5.6.320.0070.01416.12
5.6.310.0120.00616.34
5.6.300.0140.00516.02
5.6.290.0080.01216.11
5.6.280.0100.03718.49
5.6.270.0060.01216.34
5.6.260.0030.01716.04
5.6.250.0120.00916.01
5.6.240.0120.00816.00
5.6.230.0110.01115.91
5.6.220.0110.00816.18
5.6.210.0050.04618.38
5.6.200.0090.04117.02
5.6.190.0070.04618.18
5.6.180.0230.03918.23
5.6.170.0190.02918.15
5.6.160.0050.03118.11
5.6.150.0090.04617.11
5.6.140.0050.04717.07
5.6.130.0040.03117.18
5.6.120.0110.04318.49
5.6.110.0090.04118.52
5.6.100.0020.02918.57
5.6.90.0050.04218.41
5.6.80.0090.04418.27
5.6.70.0090.00915.79
5.6.60.0090.00916.02
5.6.50.0040.01415.85
5.6.40.0110.00715.88
5.6.30.0120.00615.92
5.6.20.0160.00315.94
5.6.10.0090.01215.93
5.6.00.0040.01515.78
5.5.380.0140.00915.88
5.5.370.0060.01615.77
5.5.360.0030.01516.04
5.5.350.0110.04318.13
5.5.340.0070.03317.03
5.5.330.0080.04818.03
5.5.320.0250.03918.03
5.5.310.0140.02818.28
5.5.300.0030.03916.88
5.5.290.0110.04116.97
5.5.280.0110.04318.39
5.5.270.0090.03018.44
5.5.260.0040.02918.25
5.5.250.0170.03718.27
5.5.240.0150.04017.97
5.5.230.0100.01015.89
5.5.220.0130.00915.86
5.5.210.0120.00616.07
5.5.200.0060.01315.95
5.5.190.0120.00615.65
5.5.180.0120.00615.96
5.5.170.0110.01315.87
5.5.160.0100.00715.79
5.5.150.0060.01515.89
5.5.140.0110.01816.13
5.5.130.0040.01515.96
5.5.120.0140.00715.97
5.5.110.0090.01215.88
5.5.100.0120.00915.84
5.5.90.0090.01315.95
5.5.80.0130.00715.91
5.5.70.0040.01715.94
5.5.60.0050.01715.92
5.5.50.0180.00615.63
5.5.40.0140.00915.89
5.5.30.0140.00715.85
5.5.20.0120.00915.82
5.5.10.0100.01015.84
5.5.00.0130.01015.77
5.4.450.0190.03615.95
5.4.440.0410.03816.06
5.4.430.0500.03416.16
5.4.420.0350.00716.18
5.4.410.0350.00515.96
5.4.400.0490.00216.02
5.4.390.0350.00315.90
5.4.380.0370.00315.94
5.4.370.0350.00315.96
5.4.360.0470.00415.85
5.4.350.0380.00315.94
5.4.340.0060.02212.35
5.4.330.0090.00812.74
5.4.320.0080.02412.66
5.4.310.0100.02612.65
5.4.300.0080.02612.59
5.4.290.0040.03712.60
5.4.280.0110.02712.53
5.4.270.0080.02912.46
5.4.260.0120.03212.57
5.4.250.0110.02912.61
5.4.240.0090.02212.61
5.4.230.0120.02212.54
5.4.220.0080.02812.56
5.4.210.0100.03112.62
5.4.200.0080.03212.57
5.4.190.0100.02812.58
5.4.180.0060.03212.57
5.4.170.0060.03012.48
5.4.160.0080.02312.47
5.4.150.0070.02212.53
5.4.140.0070.02512.42
5.4.130.0040.02412.37
5.4.120.0070.02612.40
5.4.110.0090.01912.41
5.4.100.0050.02312.48
5.4.90.0040.02512.37
5.4.80.0070.02212.49
5.4.70.0060.02412.45
5.4.60.0060.02312.35
5.4.50.0090.01912.44
5.4.40.0060.02812.37
5.4.30.0040.02612.46
5.4.20.0050.02512.40
5.4.10.0040.02512.39
5.4.00.0080.02012.17
5.3.290.0100.02413.07
5.3.280.0080.02312.88
5.3.270.0090.02313.05
5.3.260.0070.02612.90
5.3.250.0070.02512.98
5.3.240.0100.02312.84
5.3.230.0120.02012.85
5.3.220.0080.02412.82
5.3.210.0040.02712.81
5.3.200.0100.02412.82
5.3.190.0080.02312.93
5.3.180.0110.02112.91
5.3.170.0060.03212.92
5.3.160.0080.02313.01
5.3.150.0080.02912.95
5.3.140.0080.02412.87
5.3.130.0100.03012.95
5.3.120.0090.03112.90
5.3.110.0090.02612.95
5.3.100.0080.02712.61
5.3.90.0090.02312.59
5.3.80.0070.02312.59
5.3.70.0050.02612.56
5.3.60.0080.02312.57
5.3.50.0070.02412.56
5.3.40.0070.02412.49
5.3.30.0050.02512.55
5.3.20.0060.02512.44
5.3.10.0050.02512.34
5.3.00.0060.02612.32
5.2.170.0080.01810.72
5.2.160.0060.01910.63
5.2.150.0060.02110.62
5.2.140.0040.02210.67
5.2.130.0090.01810.70
5.2.120.0090.01810.65
5.2.110.0080.01810.58
5.2.100.0110.01510.66
5.2.90.0070.02010.55
5.2.80.0070.01910.51
5.2.70.0110.01610.59
5.2.60.0060.02210.52
5.2.50.0080.02010.53
5.2.40.0080.01810.48
5.2.30.0090.01810.52
5.2.20.0090.01810.42
5.2.10.0080.01710.32
5.2.00.0090.01710.24
5.1.60.0070.0159.52
5.1.50.0060.0179.56
5.1.40.0070.0189.62
5.1.30.0090.0159.88
5.1.20.0100.0149.90
5.1.10.0020.0219.67
5.1.00.0050.0189.55
5.0.50.0040.0158.43
5.0.40.0070.0168.36
5.0.30.0050.0238.27
5.0.20.0040.0148.25
5.0.10.0070.0138.24
5.0.00.0070.0188.23
4.4.90.0020.0107.49
4.4.80.0020.0107.48
4.4.70.0040.0077.48
4.4.60.0030.0087.48
4.4.50.0040.0087.49
4.4.40.0070.0107.46
4.4.30.0010.0127.48
4.4.20.0030.0097.52
4.4.10.0020.0107.53
4.4.00.0040.0127.48
4.3.110.0020.0107.44
4.3.100.0020.0117.43
4.3.90.0030.0107.42
4.3.80.0050.0127.39
4.3.70.0010.0127.42
4.3.60.0020.0097.41
4.3.50.0040.0097.41
4.3.40.0010.0157.37
4.3.30.0030.0086.75
4.3.20.0020.0096.75
4.3.10.0010.0106.72
4.3.00.0010.0148.82

preferences:
36.75 ms | 401 KiB | 5 Q