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()); echo "\n\n"; $arr{"246a"} = 99; var_dump($arr); $o = (object) $arr; var_dump($o); echo $o->{"246s"},"\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)
8.3.60.0100.00718.43
8.3.50.0130.01021.13
8.3.40.0140.00418.85
8.3.30.0140.00019.00
8.3.20.0040.00420.25
8.3.10.0000.00823.66
8.3.00.0060.00319.25
8.2.180.0140.00316.32
8.2.170.0110.00322.96
8.2.160.0030.01020.39
8.2.150.0080.00024.18
8.2.140.0000.00824.66
8.2.130.0000.00826.16
8.2.120.0040.00422.27
8.2.110.0000.01021.11
8.2.100.0040.00817.50
8.2.90.0020.00519.09
8.2.80.0040.00417.97
8.2.70.0090.00017.38
8.2.60.0080.00017.55
8.2.50.0000.00818.07
8.2.40.0030.00619.76
8.2.30.0000.00717.86
8.2.20.0070.00017.63
8.2.10.0070.00017.80
8.2.00.0070.00017.55
8.1.280.0070.00725.92
8.1.270.0030.00622.03
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0030.00623.92
8.1.230.0090.00317.42
8.1.220.0030.00617.74
8.1.210.0000.00918.77
8.1.200.0000.01017.00
8.1.190.0000.00917.22
8.1.180.0000.00718.10
8.1.170.0050.00318.59
8.1.160.0040.00421.84
8.1.150.0000.00718.64
8.1.140.0050.00217.23
8.1.130.0030.00317.71
8.1.120.0040.00417.23
8.1.110.0030.00617.22
8.1.100.0000.00717.21
8.1.90.0000.00717.30
8.1.80.0040.00417.38
8.1.70.0030.00317.27
8.1.60.0090.00017.44
8.1.50.0050.00317.39
8.1.40.0000.00817.44
8.1.30.0040.00417.36
8.1.20.0040.00417.51
8.1.10.0000.00817.39
8.1.00.0080.00017.32
8.0.300.0080.00018.77
8.0.290.0060.00316.62
8.0.280.0040.00418.36
8.0.270.0070.00016.77
8.0.260.0030.00317.13
8.0.250.0000.00716.91
8.0.240.0070.00016.86
8.0.230.0030.00316.75
8.0.220.0070.00316.72
8.0.210.0070.00016.82
8.0.200.0030.00316.74
8.0.190.0040.00416.82
8.0.180.0070.00016.88
8.0.170.0040.00416.73
8.0.160.0040.00416.93
8.0.150.0000.00716.73
8.0.140.0000.00816.82
8.0.130.0030.00313.19
8.0.120.0030.00616.64
8.0.110.0040.00416.86
8.0.100.0070.00016.82
8.0.90.0030.00516.70
8.0.80.0000.01616.84
8.0.70.0040.00416.73
8.0.60.0000.00716.73
8.0.50.0000.00716.71
8.0.30.0160.00316.98
8.0.20.0080.01417.40
8.0.10.0040.00417.07
8.0.00.0100.01016.83
7.4.330.0030.00315.00
7.4.320.0040.00416.53
7.4.300.0030.00316.46
7.4.290.0000.00716.59
7.4.280.0000.00816.35
7.4.270.0000.00716.55
7.4.260.0000.00816.63
7.4.250.0070.00016.48
7.4.240.0050.00316.51
7.4.230.0000.00816.60
7.4.220.0140.00716.61
7.4.210.0030.01016.43
7.4.200.0000.00716.40
7.4.160.0110.00716.39
7.4.150.0140.00417.40
7.4.140.0110.01017.86
7.4.130.0140.00516.52
7.4.120.0120.00616.60
7.4.110.0190.00416.41
7.4.100.0210.00016.40
7.4.90.0160.00716.52
7.4.80.0120.01219.39
7.4.70.0120.00616.53
7.4.60.0090.01216.45
7.4.50.0060.00716.48
7.4.40.0050.01816.30
7.4.30.0140.01116.26
7.4.20.0110.01016.38
7.4.10.0060.01515.66
7.4.00.0090.01115.53
7.3.330.0050.00013.32
7.3.320.0000.00513.43
7.3.310.0040.00416.25
7.3.300.0040.00416.43
7.3.290.0000.01316.37
7.3.280.0060.01116.39
7.3.270.0070.01017.40
7.3.260.0060.01316.48
7.3.250.0120.01016.52
7.3.240.0050.01416.38
7.3.230.0090.00916.46
7.3.210.0110.00716.45
7.3.200.0070.01119.39
7.3.190.0090.01216.72
7.3.180.0120.00816.35
7.3.170.0180.00416.39
7.3.160.0130.01016.46
7.3.150.0170.00316.30
7.3.140.0190.00616.59
7.3.130.0080.01115.61
7.3.120.0100.00715.55
7.3.110.0070.00915.40
7.3.100.0050.01415.50
7.3.90.0110.00815.72
7.3.80.0090.00915.55
7.3.70.0110.00615.62
7.3.60.0090.01315.51
7.3.50.0100.00815.60
7.3.40.0050.01415.63
7.3.30.0140.00515.56
7.3.20.0110.00916.50
7.3.10.0090.00716.58
7.3.00.0060.01216.31
7.2.330.0280.01416.49
7.2.320.0200.00616.70
7.2.310.0110.01116.48
7.2.300.0120.01216.62
7.2.290.0110.01116.54
7.2.280.0110.00816.77
7.2.270.0100.01316.77
7.2.260.0100.00815.83
7.2.250.0120.00715.96
7.2.240.0080.01015.93
7.2.230.0130.00815.88
7.2.220.0100.00915.95
7.2.210.0080.01015.94
7.2.200.0080.01015.85
7.2.190.0130.00815.97
7.2.180.0090.01015.91
7.2.170.0120.00515.66
7.2.160.0070.01115.81
7.2.150.0060.01216.70
7.2.140.0060.01116.78
7.2.130.0050.01316.70
7.2.120.0090.00716.68
7.2.110.0130.00616.78
7.2.100.0080.01216.85
7.2.90.0120.00816.94
7.2.80.0220.00316.74
7.2.70.0070.01216.86
7.2.60.0060.01116.82
7.2.50.0030.01216.89
7.2.40.0100.01016.86
7.2.30.0090.00716.62
7.2.20.0120.00916.92
7.2.10.0100.01016.80
7.2.00.0090.00917.76
7.1.330.0050.01415.79
7.1.320.0090.00615.58
7.1.310.0100.00815.79
7.1.300.0080.01215.72
7.1.290.0140.00815.75
7.1.280.0050.01515.56
7.1.270.0090.00815.70
7.1.260.0110.00815.52
7.1.250.0020.01315.73
7.1.240.0050.01315.63
7.1.230.0100.00715.63
7.1.220.0060.01515.58
7.1.210.0130.00715.67
7.1.200.0080.00915.60
7.1.190.0120.00715.65
7.1.180.0090.00915.61
7.1.170.0100.00615.72
7.1.160.0070.00915.71
7.1.150.0100.00515.71
7.1.140.0110.00615.59
7.1.130.0130.00815.73
7.1.120.0040.01515.57
7.1.110.0050.01315.73
7.1.100.0070.00916.44
7.1.90.0080.00915.73
7.1.80.0110.00315.52
7.1.70.0050.00516.12
7.1.60.0080.01116.78
7.1.50.0100.00816.13
7.1.40.0120.00715.64
7.1.30.0110.00515.73
7.1.20.0100.00715.54
7.1.10.0070.01015.66
7.1.00.0080.03017.97
7.0.330.0080.00815.32
7.0.320.0140.00415.32
7.0.310.0060.01115.28
7.0.300.0090.00615.22
7.0.290.0090.00515.50
7.0.280.0080.00715.26
7.0.270.0050.01215.32
7.0.260.0100.00815.39
7.0.250.0090.00915.40
7.0.240.0090.01015.49
7.0.230.0020.01715.16
7.0.220.0110.00515.43
7.0.210.0060.00815.45
7.0.200.0050.00915.85
7.0.190.0030.01115.33
7.0.180.0060.01115.38
7.0.170.0140.00615.20
7.0.160.0080.00815.23
7.0.150.0090.00815.29
7.0.140.0040.03017.61
7.0.130.0050.01415.34
7.0.120.0080.00815.25
7.0.110.0080.01015.35
7.0.100.0060.01115.20
7.0.90.0110.00415.33
7.0.80.0130.00415.35
7.0.70.0100.00715.33
7.0.60.0100.01716.86
7.0.50.0070.03116.20
7.0.40.0090.02316.28
7.0.30.0190.03216.36
7.0.20.0160.03216.21
7.0.10.0080.03616.30
7.0.00.0120.03516.31
5.6.400.0040.01515.30
5.6.390.0110.00615.04
5.6.380.0070.01215.31
5.6.370.0080.01315.40
5.6.360.0060.01115.29
5.6.350.0100.00715.21
5.6.340.0110.00515.21
5.6.330.0110.00615.47
5.6.320.0120.00615.10
5.6.310.0040.01115.29
5.6.300.0090.01015.31
5.6.290.0150.00715.32
5.6.280.0090.03017.13
5.6.270.0050.01015.20
5.6.260.0050.01415.26
5.6.250.0100.00815.28
5.6.240.0090.01015.21
5.6.230.0130.00615.19
5.6.220.0090.00815.18
5.6.210.0040.02417.00
5.6.200.0100.03216.21
5.6.190.0110.03416.89
5.6.180.0180.03217.08
5.6.170.0140.01917.12
5.6.160.0070.02117.01
5.6.150.0080.02816.17
5.6.140.0090.03516.22
5.6.130.0120.02916.19
5.6.120.0070.03117.14
5.6.110.0060.03717.18
5.6.100.0070.02117.22
5.6.90.0100.03417.15
5.6.80.0150.02316.94
5.6.70.0060.01214.97
5.6.60.0090.01115.12
5.6.50.0070.01115.11
5.6.40.0090.00915.15
5.6.30.0100.00715.25
5.6.20.0100.00515.38
5.6.10.0070.00815.30
5.6.00.0060.01015.14
5.5.380.0130.00715.32
5.5.370.0080.01015.20
5.5.360.0040.01315.04
5.5.350.0130.02716.99
5.5.340.0060.02616.18
5.5.330.0090.01616.91
5.5.320.0100.02716.89
5.5.310.0110.03017.04
5.5.300.0090.03316.02
5.5.290.0040.03316.26
5.5.280.0080.01917.13
5.5.270.0110.01717.04
5.5.260.0120.03217.16
5.5.250.0070.03217.05
5.5.240.0100.03316.81
5.5.230.0110.00515.14
5.5.220.0080.00915.15
5.5.210.0090.00815.10
5.5.200.0050.01115.16
5.5.190.0110.00615.18
5.5.180.0070.01015.22
5.5.170.0070.01215.09
5.5.160.0100.01015.26
5.5.150.0110.01115.27
5.5.140.0080.00915.13
5.5.130.0100.00715.09
5.5.120.0000.02215.22
5.5.110.0080.01315.35
5.5.100.0070.00715.16
5.5.90.0110.01015.16
5.5.80.0060.01115.05
5.5.70.0060.01115.18
5.5.60.0060.01115.18
5.5.50.0090.01015.12
5.5.40.0090.00915.10
5.5.30.0120.00515.23
5.5.20.0030.01515.21
5.5.10.0060.01515.03
5.5.00.0090.01115.12
5.4.450.0220.02214.41
5.4.440.0180.02214.36
5.4.430.0120.02214.46
5.4.420.0260.00714.61
5.4.410.0260.00514.51
5.4.400.0290.00314.38
5.4.390.0280.01014.46
5.4.380.0270.00514.34
5.4.370.0270.00314.44
5.4.360.0250.00514.31
5.4.350.0280.00214.39
5.4.340.0040.02511.89
5.4.330.0080.00611.98
5.4.320.0030.02312.25
5.4.310.0070.01712.07
5.4.300.0080.01812.13
5.4.290.0040.01912.20
5.4.280.0050.01812.05
5.4.270.0040.01912.13
5.4.260.0080.01912.13
5.4.250.0070.01812.06
5.4.240.0080.01411.99
5.4.230.0080.01712.04
5.4.220.0090.01512.06
5.4.210.0080.01312.18
5.4.200.0070.01812.19
5.4.190.0050.01712.11
5.4.180.0070.01812.10
5.4.170.0020.02511.97
5.4.160.0030.02312.05
5.4.150.0070.01712.07
5.4.140.0090.02011.96
5.4.130.0080.01812.00
5.4.120.0070.01812.05
5.4.110.0070.01912.04
5.4.100.0070.01712.07
5.4.90.0040.01812.00
5.4.80.0070.01611.96
5.4.70.0060.01512.05
5.4.60.0050.01612.01
5.4.50.0070.01712.10
5.4.40.0050.01812.04
5.4.30.0050.01712.00
5.4.20.0050.01812.05
5.4.10.0070.01712.04
5.4.00.0060.01911.80
5.3.290.0100.03212.98
5.3.280.0070.02712.87
5.3.270.0070.02512.98
5.3.260.0090.02612.89
5.3.250.0080.02812.93
5.3.240.0100.02112.85
5.3.230.0100.02312.86
5.3.220.0100.02312.91
5.3.210.0060.02612.92
5.3.200.0090.02412.87
5.3.190.0090.02412.89
5.3.180.0080.02212.97
5.3.170.0100.02312.93
5.3.160.0090.02412.97
5.3.150.0080.02613.02
5.3.140.0110.02512.97
5.3.130.0090.02313.05
5.3.120.0100.02412.97
5.3.110.0080.02313.05
5.3.100.0080.02612.70
5.3.90.0100.02012.69
5.3.80.0110.01912.56
5.3.70.0080.02212.54
5.3.60.0070.03012.58
5.3.50.0100.02212.58
5.3.40.0100.02712.60
5.3.30.0100.02012.49
5.3.20.0040.02912.37
5.3.10.0110.02012.29
5.3.00.0120.02012.27
5.2.170.0050.02110.59
5.2.160.0080.01710.67
5.2.150.0070.02810.61
5.2.140.0090.02410.67
5.2.130.0120.02410.59
5.2.120.0080.01910.58
5.2.110.0100.02110.61
5.2.100.0050.02210.64
5.2.90.0070.02310.65
5.2.80.0150.01310.62
5.2.70.0110.02410.57
5.2.60.0090.02310.49
5.2.50.0090.01910.49
5.2.40.0080.02210.63
5.2.30.0070.02510.56
5.2.20.0090.01910.41
5.2.10.0090.01810.31
5.2.00.0090.02110.29
5.1.60.0050.0179.57
5.1.50.0060.0189.50
5.1.40.0100.0139.57
5.1.30.0060.0279.82
5.1.20.0080.0189.84
5.1.10.0080.0189.65
5.1.00.0080.0149.56
5.0.50.0040.0188.42
5.0.40.0080.0128.35
5.0.30.0040.0218.26
5.0.20.0070.0128.24
5.0.10.0020.0198.23
5.0.00.0050.0208.23
4.4.90.0030.0097.49
4.4.80.0020.0097.48
4.4.70.0070.0077.48
4.4.60.0040.0117.48
4.4.50.0030.0147.49
4.4.40.0050.0167.46
4.4.30.0040.0157.48
4.4.20.0050.0077.52
4.4.10.0030.0147.53
4.4.00.0040.0147.48
4.3.110.0050.0097.44
4.3.100.0040.0087.44
4.3.90.0050.0077.42
4.3.80.0040.0147.39
4.3.70.0030.0097.42
4.3.60.0040.0087.41
4.3.50.0040.0077.42
4.3.40.0030.0147.37
4.3.30.0030.0116.75
4.3.20.0020.0156.74
4.3.10.0010.0126.72
4.3.00.0000.0198.82

preferences:
59.47 ms | 401 KiB | 5 Q