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)
8.3.40.0070.00718.67
8.3.30.0080.00619.14
8.3.20.0040.00420.33
8.3.10.0040.00423.48
8.3.00.0040.00419.13
8.2.170.0120.00322.96
8.2.160.0100.01019.09
8.2.150.0030.00524.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00722.19
8.2.110.0030.00620.23
8.2.100.0040.00718.09
8.2.90.0080.00019.09
8.2.80.0030.00517.97
8.2.70.0080.00017.50
8.2.60.0030.00717.78
8.2.50.0050.00318.07
8.2.40.0000.00819.71
8.2.30.0040.00418.04
8.2.20.0000.00717.56
8.2.10.0000.00717.93
8.2.00.0000.00717.43
8.1.270.0040.00422.23
8.1.260.0050.00226.35
8.1.250.0070.00028.09
8.1.240.0030.00723.96
8.1.230.0040.00819.04
8.1.220.0040.00417.74
8.1.210.0050.00318.77
8.1.200.0030.00617.11
8.1.190.0080.00016.88
8.1.180.0040.00418.10
8.1.170.0060.00318.50
8.1.160.0000.00821.91
8.1.150.0040.00418.63
8.1.140.0070.00017.24
8.1.130.0040.00419.21
8.1.120.0070.00017.30
8.1.110.0040.00417.36
8.1.100.0000.00717.23
8.1.90.0030.00317.29
8.1.80.0000.00817.25
8.1.70.0040.00417.26
8.1.60.0030.00617.42
8.1.50.0000.00917.22
8.1.40.0000.00817.38
8.1.30.0030.00617.44
8.1.20.0080.00017.45
8.1.10.0040.00417.31
8.1.00.0050.00217.29
8.0.300.0000.00718.77
8.0.290.0080.00016.58
8.0.280.0030.00318.36
8.0.270.0040.00417.12
8.0.260.0030.00316.82
8.0.250.0000.00716.78
8.0.240.0040.00416.79
8.0.230.0030.00516.78
8.0.220.0030.00716.77
8.0.210.0000.00716.80
8.0.200.0060.00016.75
8.0.190.0000.00716.77
8.0.180.0050.00216.86
8.0.170.0040.00416.87
8.0.160.0070.00016.70
8.0.150.0070.00016.81
8.0.140.0080.00016.70
8.0.130.0000.00513.27
8.0.120.0000.00716.69
8.0.110.0040.00416.74
8.0.100.0050.00316.70
8.0.90.0040.00416.73
8.0.80.0070.00716.89
8.0.70.0050.00316.69
8.0.60.0060.00316.66
8.0.50.0050.00316.77
8.0.30.0140.00517.01
8.0.20.0110.00817.40
8.0.10.0050.00217.07
8.0.00.0070.01116.71
7.4.330.0020.00215.00
7.4.320.0030.00316.65
7.4.300.0030.00316.59
7.4.290.0040.00416.46
7.4.280.0000.00816.50
7.4.270.0030.00316.53
7.4.260.0030.00316.52
7.4.250.0060.00316.59
7.4.240.0030.00416.53
7.4.230.0040.00416.48
7.4.220.0090.00916.40
7.4.210.0070.00716.52
7.4.200.0040.00316.41
7.4.160.0130.01316.47
7.4.150.0140.00617.40
7.4.140.0160.00817.86
7.4.130.0110.00916.63
7.4.120.0080.01016.67
7.4.110.0150.00316.39
7.4.100.0040.01516.54
7.4.90.0030.01616.45
7.4.80.0160.00719.39
7.4.70.0140.00416.76
7.4.60.0100.01116.43
7.4.50.0060.00916.51
7.4.40.0190.00316.22
7.4.30.0060.01416.14
7.4.20.0080.01016.32
7.4.10.0110.00616.36
7.4.00.0070.01215.82
7.3.330.0030.00313.17
7.3.320.0050.00013.18
7.3.310.0070.00016.36
7.3.300.0030.00316.18
7.3.290.0040.01116.36
7.3.280.0070.01316.28
7.3.270.0060.01217.40
7.3.260.0160.00316.29
7.3.250.0110.00816.52
7.3.240.0130.00616.50
7.3.230.0110.00916.45
7.3.210.0200.00316.18
7.3.200.0170.00719.39
7.3.190.0140.00416.49
7.3.180.0120.00516.62
7.3.170.0030.02016.36
7.3.160.0130.00916.48
7.3.150.0130.01116.16
7.3.140.0140.00616.34
7.3.130.0100.01216.38
7.3.120.0090.01316.15
7.3.110.0120.01016.03
7.3.100.0080.01216.34
7.3.90.0150.00616.39
7.3.80.0130.01016.68
7.3.70.0160.00316.31
7.3.60.0070.01516.22
7.3.50.0190.00016.33
7.3.40.0130.00616.32
7.3.30.0190.00016.25
7.3.20.0140.00516.42
7.3.10.0120.00616.37
7.3.00.0090.00916.46
7.2.330.0080.01116.69
7.2.320.0100.01616.68
7.2.310.0140.00616.42
7.2.300.0070.01716.54
7.2.290.0150.00916.63
7.2.280.0100.01516.75
7.2.270.0050.01716.53
7.2.260.0100.01316.82
7.2.250.0100.01416.47
7.2.240.0180.00616.58
7.2.230.0090.00916.59
7.2.220.0070.01116.72
7.2.210.0130.00816.43
7.2.200.0110.00816.64
7.2.190.0140.01116.61
7.2.180.0060.01616.72
7.2.170.0100.01016.56
7.2.160.0180.00316.65
7.2.150.0000.02016.73
7.2.140.0120.00916.60
7.2.130.0160.00916.66
7.2.120.0140.01016.68
7.2.110.0150.00916.69
7.2.100.0160.00316.52
7.2.90.0080.01316.66
7.2.80.0100.01616.51
7.2.70.0100.01316.44
7.2.60.0110.00416.82
7.2.50.0130.00716.43
7.2.40.0100.01016.45
7.2.30.0120.01216.54
7.2.20.0140.01116.55
7.2.10.0150.00616.50
7.2.00.0080.01017.93
7.1.330.0030.01415.47
7.1.320.0190.00015.55
7.1.310.0130.00615.52
7.1.300.0160.00515.64
7.1.290.0040.01715.55
7.1.280.0130.01015.66
7.1.270.0110.00715.60
7.1.260.0090.00915.41
7.1.250.0120.00515.44
7.1.240.0090.01515.44
7.1.230.0040.01315.50
7.1.220.0000.01815.47
7.1.210.0070.01115.52
7.1.200.0050.01015.58
7.1.190.0150.00315.34
7.1.180.0140.00615.49
7.1.170.0220.01015.37
7.1.160.0070.01415.46
7.1.150.0110.00815.48
7.1.140.0130.01015.53
7.1.130.0090.01315.50
7.1.120.0140.00815.56
7.1.110.0110.01115.62
7.1.100.0070.01016.85
7.1.90.0060.01315.63
7.1.80.0070.01115.45
7.1.70.0080.00816.46
7.1.60.0060.01217.42
7.1.50.0120.01016.31
7.1.40.0090.00615.27
7.1.30.0030.01315.56
7.1.20.0040.01315.50
7.1.10.0060.01115.68
7.1.00.0060.04418.98
7.0.330.0070.01415.21
7.0.320.0000.01815.28
7.0.310.0100.01115.25
7.0.300.0070.01415.13
7.0.290.0110.01115.38
7.0.280.0140.00715.13
7.0.270.0090.00915.21
7.0.260.0110.00915.46
7.0.250.0180.00315.29
7.0.240.0060.01015.28
7.0.230.0130.01015.48
7.0.220.0100.00615.30
7.0.210.0120.00315.25
7.0.200.0090.00315.91
7.0.190.0000.01715.29
7.0.180.0030.01315.33
7.0.170.0140.00315.25
7.0.160.0030.01415.24
7.0.150.0080.00815.11
7.0.140.0050.04318.64
7.0.130.0160.00415.27
7.0.120.0070.01015.11
7.0.110.0100.00915.38
7.0.100.0180.00615.20
7.0.90.0130.00415.30
7.0.80.0150.00415.22
7.0.70.0160.00015.11
7.0.60.0140.03517.59
7.0.50.0060.04516.54
7.0.40.0090.02417.62
7.0.30.0240.03617.66
7.0.20.0210.04217.76
7.0.10.0110.03917.67
7.0.00.0110.02417.74
5.6.400.0100.01016.01
5.6.390.0030.02116.02
5.6.380.0060.01516.09
5.6.370.0070.01716.21
5.6.360.0120.01016.00
5.6.350.0110.01216.24
5.6.340.0150.00815.94
5.6.330.0100.01016.04
5.6.320.0060.01516.30
5.6.310.0070.01315.88
5.6.300.0120.00616.16
5.6.290.0080.01115.98
5.6.280.0080.04218.48
5.6.270.0120.00716.09
5.6.260.0120.00616.10
5.6.250.0070.01116.16
5.6.240.0150.00415.95
5.6.230.0130.01016.11
5.6.220.0100.01016.18
5.6.210.0030.05418.32
5.6.200.0070.02716.98
5.6.190.0060.03118.18
5.6.180.0190.03918.21
5.6.170.0130.02918.39
5.6.160.0090.02518.26
5.6.150.0030.03917.20
5.6.140.0110.03817.17
5.6.130.0090.03217.24
5.6.120.0140.04818.34
5.6.110.0120.04818.40
5.6.100.0050.02618.58
5.6.90.0060.02918.62
5.6.80.0120.03918.16
5.6.70.0100.01315.94
5.6.60.0120.00615.98
5.6.50.0030.01515.94
5.6.40.0070.01015.80
5.6.30.0070.01115.89
5.6.20.0110.00815.94
5.6.10.0130.00616.00
5.6.00.0080.01115.96
5.5.380.0070.01415.90
5.5.370.0120.00815.92
5.5.360.0100.01016.04
5.5.350.0080.04718.08
5.5.340.0080.04516.97
5.5.330.0100.03818.17
5.5.320.0080.03518.11
5.5.310.0110.02818.30
5.5.300.0100.04516.88
5.5.290.0110.04216.90
5.5.280.0080.02418.34
5.5.270.0100.04718.35
5.5.260.0150.02718.41
5.5.250.0160.03818.27
5.5.240.0210.03718.08
5.5.230.0080.01316.03
5.5.220.0060.01216.04
5.5.210.0120.00615.91
5.5.200.0100.01015.75
5.5.190.0110.00715.69
5.5.180.0030.01516.00
5.5.170.0040.01515.88
5.5.160.0120.00916.05
5.5.150.0040.01415.89
5.5.140.0070.01015.92
5.5.130.0090.01216.00
5.5.120.0100.00715.98
5.5.110.0090.00916.04
5.5.100.0070.01115.79
5.5.90.0120.00615.82
5.5.80.0090.01315.89
5.5.70.0030.01416.05
5.5.60.0080.01215.91
5.5.50.0090.00915.84
5.5.40.0110.00715.85
5.5.30.0030.01515.87
5.5.20.0070.01015.78
5.5.10.0120.00615.86
5.5.00.0070.01015.94
5.4.450.0270.03216.27
5.4.440.0060.03716.20
5.4.430.0350.03416.12
5.4.420.0450.00516.02
5.4.410.0370.00316.11
5.4.400.0390.00215.98
5.4.390.0330.00515.90
5.4.380.0390.00315.87
5.4.370.0380.00215.96
5.4.360.0360.00415.82
5.4.350.0380.00315.89
5.4.340.0050.02412.36
5.4.330.0000.01512.74
5.4.320.0080.02312.61
5.4.310.0090.02112.61
5.4.300.0080.02112.63
5.4.290.0050.02612.64
5.4.280.0050.02212.57
5.4.270.0050.02312.57
5.4.260.0060.02312.62
5.4.250.0060.02312.56
5.4.240.0040.02412.60
5.4.230.0080.02112.51
5.4.220.0080.02112.53
5.4.210.0090.02012.54
5.4.200.0090.02512.59
5.4.190.0080.02012.62
5.4.180.0080.02412.57
5.4.170.0060.02612.50
5.4.160.0050.02312.59
5.4.150.0060.02612.58
5.4.140.0080.02212.37
5.4.130.0030.02712.41
5.4.120.0070.02312.38
5.4.110.0080.02212.35
5.4.100.0080.02212.43
5.4.90.0050.02512.43
5.4.80.0040.02712.36
5.4.70.0060.02112.38
5.4.60.0050.02412.37
5.4.50.0020.02512.49
5.4.40.0080.02212.38
5.4.30.0110.01912.46
5.4.20.0090.01912.45
5.4.10.0070.02212.43
5.4.00.0050.02312.16
5.3.290.0100.02612.98
5.3.280.0110.02112.94
5.3.270.0070.02512.97
5.3.260.0070.02412.89
5.3.250.0100.02112.92
5.3.240.0120.02312.92
5.3.230.0070.02912.86
5.3.220.0120.02512.80
5.3.210.0110.02112.82
5.3.200.0080.02612.83
5.3.190.0040.02812.85
5.3.180.0070.02312.97
5.3.170.0070.02512.99
5.3.160.0100.02412.99
5.3.150.0080.02312.92
5.3.140.0100.02012.88
5.3.130.0110.02512.89
5.3.120.0050.02613.02
5.3.110.0070.02812.90
5.3.100.0100.02212.61
5.3.90.0090.02212.67
5.3.80.0120.02012.52
5.3.70.0090.02412.59
5.3.60.0060.02812.62
5.3.50.0030.02612.51
5.3.40.0050.02512.52
5.3.30.0110.02112.60
5.3.20.0070.02812.52
5.3.10.0070.02312.26
5.3.00.0090.02412.25
5.2.170.0070.01810.64
5.2.160.0100.01610.71
5.2.150.0050.02310.66
5.2.140.0080.01810.60
5.2.130.0080.02310.56
5.2.120.0110.02010.59
5.2.110.0090.01910.73
5.2.100.0070.01910.58
5.2.90.0060.02110.59
5.2.80.0080.01910.59
5.2.70.0080.01910.59
5.2.60.0100.02210.54
5.2.50.0070.02110.47
5.2.40.0090.02110.52
5.2.30.0030.02410.52
5.2.20.0070.02110.43
5.2.10.0080.02110.38
5.2.00.0050.02210.36
5.1.60.0030.0229.57
5.1.50.0110.0179.65
5.1.40.0090.0179.56
5.1.30.0080.0209.80
5.1.20.0060.0219.78
5.1.10.0050.0209.62
5.1.00.0040.0209.70
5.0.50.0080.0138.47
5.0.40.0030.0168.36
5.0.30.0070.0208.27
5.0.20.0090.0128.25
5.0.10.0080.0128.24
5.0.00.0090.0218.23
4.4.90.0030.0097.49
4.4.80.0020.0097.48
4.4.70.0030.0097.48
4.4.60.0020.0107.48
4.4.50.0020.0117.49
4.4.40.0020.0157.46
4.4.30.0010.0117.48
4.4.20.0050.0097.52
4.4.10.0020.0117.53
4.4.00.0050.0127.48
4.3.110.0020.0137.43
4.3.100.0030.0107.43
4.3.90.0030.0107.42
4.3.80.0030.0147.39
4.3.70.0040.0087.42
4.3.60.0030.0097.41
4.3.50.0050.0077.41
4.3.40.0030.0137.37
4.3.30.0010.0116.76
4.3.20.0010.0106.75
4.3.10.0010.0116.72
4.3.00.0060.0138.82

preferences:
82.18 ms | 400 KiB | 5 Q