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"; } 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)
8.3.60.0140.00018.31
8.3.50.0090.00921.14
8.3.40.0110.00418.60
8.3.30.0080.00518.95
8.3.20.0040.00420.34
8.3.10.0000.00723.57
8.3.00.0000.00819.10
8.2.180.0120.00918.04
8.2.170.0060.00922.96
8.2.160.0040.01120.45
8.2.150.0000.00824.18
8.2.140.0030.00524.66
8.2.130.0030.00326.16
8.2.120.0100.00022.25
8.2.110.0030.00620.54
8.2.100.0070.00417.91
8.2.90.0030.00519.04
8.2.80.0000.00817.97
8.2.70.0060.00317.38
8.2.60.0030.00917.80
8.2.50.0040.00418.07
8.2.40.0000.00817.95
8.2.30.0070.00017.94
8.2.20.0000.00717.46
8.2.10.0040.00417.86
8.2.00.0000.00817.55
8.1.280.0070.01125.92
8.1.270.0030.00521.85
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0030.00623.97
8.1.230.0070.00319.16
8.1.220.0000.00917.74
8.1.210.0000.00818.77
8.1.200.0030.00617.10
8.1.190.0050.00317.13
8.1.180.0000.00818.10
8.1.170.0030.00518.51
8.1.160.0000.00721.94
8.1.150.0070.00018.87
8.1.140.0000.00719.37
8.1.130.0000.00717.83
8.1.120.0000.00717.32
8.1.110.0070.00017.34
8.1.100.0070.00017.20
8.1.90.0040.00417.38
8.1.80.0000.00717.19
8.1.70.0000.00617.21
8.1.60.0030.00517.46
8.1.50.0050.00317.40
8.1.40.0030.00617.41
8.1.30.0040.00417.57
8.1.20.0030.00617.51
8.1.10.0000.00717.36
8.1.00.0040.00417.28
8.0.300.0070.00018.77
8.0.290.0000.00816.63
8.0.280.0000.00818.19
8.0.270.0000.00717.04
8.0.260.0030.00317.24
8.0.250.0030.00316.79
8.0.240.0000.00716.97
8.0.230.0070.00016.85
8.0.220.0050.00516.84
8.0.210.0000.00816.70
8.0.200.0000.00616.93
8.0.190.0000.00716.77
8.0.180.0040.00416.86
8.0.170.0040.00416.80
8.0.160.0040.00416.86
8.0.150.0070.00016.64
8.0.140.0070.00016.83
8.0.130.0030.00313.21
8.0.120.0040.00416.79
8.0.110.0000.00816.70
8.0.100.0000.00816.87
8.0.90.0070.00016.70
8.0.80.0090.00616.88
8.0.70.0040.00416.77
8.0.60.0050.00216.80
8.0.50.0030.00616.87
8.0.30.0100.01016.85
8.0.20.0060.01217.40
8.0.10.0070.00016.75
8.0.00.0080.00816.56
7.4.330.0000.00515.00
7.4.320.0060.00016.58
7.4.300.0000.00616.59
7.4.290.0000.00716.60
7.4.280.0040.00416.57
7.4.270.0070.00016.59
7.4.260.0000.00816.39
7.4.250.0040.00416.46
7.4.240.0050.00216.55
7.4.230.0080.00016.58
7.4.220.0190.00616.56
7.4.210.0000.01416.45
7.4.200.0030.00316.70
7.4.160.0110.00716.66
7.4.150.0150.00417.40
7.4.140.0070.01517.86
7.4.130.0120.00816.72
7.4.120.0120.00916.54
7.4.110.0130.00616.45
7.4.100.0100.01016.78
7.4.90.0150.00416.53
7.4.80.0080.01219.39
7.4.70.0120.00616.63
7.4.60.0090.01016.50
7.4.50.0050.00816.48
7.4.40.0030.01416.01
7.4.30.0180.00616.30
7.4.20.0180.00016.55
7.4.10.0000.01816.46
7.4.00.0090.00815.84
7.3.330.0000.00513.26
7.3.320.0050.00013.18
7.3.310.0080.00016.20
7.3.300.0000.00716.20
7.3.290.0070.00716.28
7.3.280.0060.01116.29
7.3.270.0070.01117.40
7.3.260.0030.01416.29
7.3.250.0130.00916.46
7.3.240.0070.01416.26
7.3.230.0180.00916.47
7.3.210.0150.00916.56
7.3.200.0060.01319.39
7.3.190.0090.01016.49
7.3.180.0070.01116.62
7.3.170.0040.01616.31
7.3.160.0090.01216.47
7.3.150.0150.00916.54
7.3.140.0190.01016.33
7.3.130.0110.01016.63
7.3.120.0220.00016.43
7.3.110.0080.01216.57
7.3.100.0120.00816.59
7.3.90.0130.01016.32
7.3.80.0100.01316.52
7.3.70.0070.01016.42
7.3.60.0080.00816.27
7.3.50.0150.00916.38
7.3.40.0160.00716.35
7.3.30.0060.01116.25
7.3.20.0130.00516.19
7.3.10.0100.01016.30
7.3.00.0070.01116.29
7.2.330.0110.00716.65
7.2.320.0130.00316.82
7.2.310.0030.02116.73
7.2.300.0170.00516.63
7.2.290.0030.02116.52
7.2.280.0070.01016.73
7.2.270.0100.01016.73
7.2.260.0110.01916.67
7.2.250.0140.01016.57
7.2.240.0130.00916.30
7.2.230.0060.01216.44
7.2.220.0120.00816.55
7.2.210.0120.00616.56
7.2.200.0080.00816.69
7.2.190.0120.00316.64
7.2.180.0120.01216.63
7.2.170.0130.00316.50
7.2.160.0110.00816.59
7.2.150.0140.00516.63
7.2.140.0060.01316.55
7.2.130.0070.01016.67
7.2.120.0090.00916.60
7.2.110.0040.01416.64
7.2.100.0120.00616.57
7.2.90.0160.00316.54
7.2.80.0070.01016.56
7.2.70.0090.00916.54
7.2.60.0120.00816.55
7.2.50.0120.00616.64
7.2.40.0060.01316.71
7.2.30.0070.01316.71
7.2.20.0240.00316.55
7.2.10.0120.00616.75
7.2.00.0070.01018.07
7.1.330.0110.00815.61
7.1.320.0090.00915.61
7.1.310.0170.00915.48
7.1.300.0300.00815.57
7.1.290.0190.00415.53
7.1.280.0220.00215.49
7.1.270.0060.01215.67
7.1.260.0150.00315.45
7.1.250.0060.01115.55
7.1.240.0150.00315.59
7.1.230.0110.00715.52
7.1.220.0090.00915.44
7.1.210.0040.01315.41
7.1.200.0050.01115.75
7.1.190.0000.01615.51
7.1.180.0070.01115.49
7.1.170.0080.01215.59
7.1.160.0130.01015.48
7.1.150.0070.01515.57
7.1.140.0030.01515.64
7.1.130.0070.01115.58
7.1.120.0110.00715.48
7.1.110.0160.01915.53
7.1.100.0090.00516.81
7.1.90.0080.00815.60
7.1.80.0180.00015.62
7.1.70.0060.00616.31
7.1.60.0070.01417.40
7.1.50.0060.01516.24
7.1.40.0160.00015.47
7.1.30.0060.00915.52
7.1.20.0030.01315.50
7.1.10.0060.00915.64
7.1.00.0050.04319.06
7.0.330.0030.01515.36
7.0.320.0200.00715.38
7.0.310.0110.00515.32
7.0.300.0090.00915.12
7.0.290.0140.00715.24
7.0.280.0140.00915.33
7.0.270.0040.01315.18
7.0.260.0170.00715.27
7.0.250.0040.01215.25
7.0.240.0080.00915.24
7.0.230.0110.00615.19
7.0.220.0070.01015.27
7.0.210.0120.00315.24
7.0.200.0090.00516.05
7.0.190.0140.00715.22
7.0.180.0120.00315.15
7.0.170.0150.00015.35
7.0.160.0120.00315.35
7.0.150.0100.00715.29
7.0.140.0080.04318.69
7.0.130.0090.00615.29
7.0.120.0130.00415.15
7.0.110.0040.04718.37
7.0.100.0060.02918.42
7.0.90.0070.02718.52
7.0.80.0080.03318.43
7.0.70.0070.04718.48
7.0.60.0090.03618.56
7.0.50.0040.05018.44
7.0.40.0060.04117.50
7.0.30.0050.04817.42
7.0.20.0060.03017.42
7.0.10.0070.02717.42
7.0.00.0110.03717.49
5.6.400.0130.00715.77
5.6.390.0120.00615.77
5.6.380.0100.01016.14
5.6.370.0070.01116.02
5.6.360.0070.01716.12
5.6.350.0030.01716.23
5.6.340.0090.01515.84
5.6.330.0120.00915.87
5.6.320.0150.00415.82
5.6.310.0030.01715.98
5.6.300.0100.00915.81
5.6.290.0120.00916.01
5.6.280.0050.04318.42
5.6.270.0090.00915.95
5.6.260.0030.04718.28
5.6.250.0060.04418.35
5.6.240.0070.04718.21
5.6.230.0100.02918.30
5.6.220.0120.04318.43
5.6.210.0050.04318.33
5.6.200.0050.03918.31
5.6.190.0090.04118.29
5.6.180.0050.03918.23
5.6.170.0030.05118.28
5.6.160.0100.02518.28
5.6.150.0130.03618.22
5.6.140.0100.04618.18
5.6.130.0070.02918.29
5.6.120.0100.03718.38
5.6.110.0130.03118.35
5.6.100.0050.04318.21
5.6.90.0080.04718.24
5.6.80.0120.02318.00
5.6.70.0050.03818.06
5.6.60.0050.04817.99
5.6.50.0080.04217.90
5.6.40.0080.02118.04
5.6.30.0050.02417.90
5.6.20.0080.02217.95
5.6.10.0050.04717.86
5.6.00.0110.04217.88
5.5.380.0080.04516.83
5.5.370.0060.03416.66
5.5.360.0050.04116.73
5.5.350.0070.04316.74
5.5.340.0110.04016.93
5.5.330.0110.02517.02
5.5.320.0050.04717.03
5.5.310.0070.04516.92
5.5.300.0100.02716.89
5.5.290.0080.02716.91
5.5.280.0110.04516.98
5.5.270.0060.04917.04
5.5.260.0050.04917.06
5.5.250.0050.04916.91
5.5.240.0090.03916.60
5.5.230.0060.03916.71
5.5.220.0050.03316.63
5.5.210.0050.04316.59
5.5.200.0070.04216.64
5.5.190.0100.03116.81
5.5.180.0120.03816.46
5.5.170.0130.01015.77
5.5.160.0090.03616.62
5.5.150.0070.02516.55
5.5.140.0100.03816.74
5.5.130.0050.03716.72
5.5.120.0130.03516.56
5.5.110.0110.03316.56
5.5.100.0070.03016.66
5.5.90.0060.03916.66
5.5.80.0090.04416.61
5.5.70.0050.04116.52
5.5.60.0050.04516.67
5.5.50.0140.04016.69
5.5.40.0080.03216.67
5.5.30.0130.03916.60
5.5.20.0050.04216.64
5.5.10.0060.04316.49
5.5.00.0070.02916.62
5.4.450.0080.03216.18
5.4.440.0080.04816.13
5.4.430.0070.04416.11
5.4.420.0030.04616.22
5.4.410.0090.03716.03
5.4.400.0120.02815.89
5.4.390.0140.03715.87
5.4.380.0060.04115.95
5.4.370.0030.02315.94
5.4.360.0030.03415.86
5.4.350.0050.01815.89
5.4.340.0050.02115.96
5.4.330.0090.00912.83
5.4.320.0060.03415.94
5.4.310.0050.03315.99
5.4.300.0100.03515.96
5.4.290.0060.03315.84
5.4.280.0030.04415.96
5.4.270.0090.02916.02
5.4.260.0080.03815.82
5.4.250.0030.02815.90
5.4.240.0030.04515.90
5.4.230.0050.04216.04
5.4.220.0110.02515.84
5.4.210.0050.04115.91
5.4.200.0100.03715.86
5.4.190.0090.04116.03
5.4.180.0120.03915.89
5.4.170.0100.04115.98
5.4.160.0120.03615.93
5.4.150.0080.03715.93
5.4.140.0050.02514.53
5.4.130.0080.04114.67
5.4.120.0120.03414.71
5.4.110.0070.03514.65
5.4.100.0080.02614.69
5.4.90.0130.03614.65
5.4.80.0120.04114.62
5.4.70.0090.02514.70
5.4.60.0120.03814.65
5.4.50.0090.03714.54
5.4.40.0100.03214.61
5.4.30.0080.03514.63
5.4.20.0090.03914.71
5.4.10.0100.03714.54
5.4.00.0070.03914.36
5.3.290.0100.04013.96
5.3.280.0120.03913.87
5.3.270.0120.02213.93
5.3.260.0070.04313.84
5.3.250.0050.04213.85
5.3.240.0100.02713.92
5.3.230.0130.03713.91
5.3.220.0070.03813.88
5.3.210.0060.04413.89
5.3.200.0070.04213.83
5.3.190.0160.03713.79
5.3.180.0050.04613.89
5.3.170.0080.04213.94
5.3.160.0080.04313.92
5.3.150.0070.04313.90
5.3.140.0060.04413.84
5.3.130.0090.02413.90
5.3.120.0060.04613.83
5.3.110.0110.04013.96
5.3.100.0130.03713.65
5.3.90.0050.04313.68
5.3.80.0100.04013.57
5.3.70.0080.03813.49
5.3.60.0120.03113.66
5.3.50.0090.01813.54
5.3.40.0040.02413.51
5.3.30.0080.02013.51
5.3.20.0060.03413.43
5.3.10.0040.02313.23
5.3.00.0090.03013.30
5.2.170.0070.01511.67
5.2.160.0110.02311.72
5.2.150.0070.02611.67
5.2.140.0030.02211.74
5.2.130.0060.01611.56
5.2.120.0070.03211.67
5.2.110.0050.02211.56
5.2.100.0080.02711.57
5.2.90.0050.03311.51
5.2.80.0060.03811.47
5.2.70.0110.03411.46
5.2.60.0080.03411.47
5.2.50.0020.03411.49
5.2.40.0110.03311.52
5.2.30.0130.02711.51
5.2.20.0030.02711.45
5.2.10.0060.03511.26
5.2.00.0080.02311.28
5.1.60.0110.01310.48
5.1.50.0070.03010.44
5.1.40.0090.02510.78
5.1.30.0090.02910.87
5.1.20.0050.02010.71
5.1.10.0070.03010.58
5.1.00.0040.03110.47
5.0.50.0090.02210.09
5.0.40.0020.02010.09
5.0.30.0060.02910.09
5.0.20.0060.02110.09
5.0.10.0050.02610.09
5.0.00.0050.03310.09
4.4.90.0030.01710.02
4.4.80.0020.01810.02
4.4.70.0030.01510.02
4.4.60.0030.02010.02
4.4.50.0000.02210.02
4.4.40.0030.02110.02
4.4.30.0010.02010.09
4.4.20.0050.01610.09
4.4.10.0030.01810.09
4.4.00.0030.01510.09
4.3.110.0020.01910.09
4.3.100.0020.01910.09
4.3.90.0030.01010.09
4.3.80.0030.02010.09
4.3.70.0000.02010.09
4.3.60.0010.02010.09
4.3.50.0030.02010.09
4.3.40.0030.02710.09
4.3.30.0020.02010.09
4.3.20.0000.01910.09
4.3.10.0030.01810.09
4.3.00.0010.02010.09

preferences:
52.59 ms | 401 KiB | 5 Q