3v4l.org

run code in 300+ PHP versions simultaneously
<?php $my_array = ['a','b','c']; $array_main[] = &$my_array; $array_main[] = [1, 2]; $array_main[] = [4, 5]; $array_main[] = ['etc', 'bla']; $iterations = count($array_main); for ($i = 1; $i < $iterations; $i++) { $array_main[0] = array_merge( $array_main[0], $array_main[$i] ); } echo '<pre>'; print_r($my_array);

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)
8.4.120.0100.01024.14
8.4.110.0100.00918.62
8.4.100.0130.00717.52
8.4.90.0120.00820.28
8.4.80.0140.00719.07
8.4.70.0120.00518.86
8.4.60.0140.00820.62
8.4.50.0060.00318.96
8.4.40.0110.00617.56
8.4.30.0130.00719.42
8.4.20.0160.00520.67
8.4.10.0030.00719.36
8.3.250.0110.00718.97
8.3.240.0100.00817.28
8.3.230.0100.01016.68
8.3.220.0080.01019.20
8.3.210.0130.00716.66
8.3.200.0050.00416.81
8.3.190.0030.00417.21
8.3.180.0090.00518.85
8.3.170.0110.00417.29
8.3.160.0070.01117.10
8.3.150.0090.00917.16
8.3.140.0090.00916.51
8.3.130.0040.00418.43
8.3.120.0110.00820.64
8.3.110.0070.00320.94
8.3.100.0080.00016.62
8.3.90.0080.00026.77
8.3.80.0040.00416.63
8.3.70.0140.00316.63
8.3.60.0110.00718.55
8.3.50.0130.00317.13
8.3.40.0120.00319.04
8.3.30.0090.00618.84
8.3.20.0030.00618.86
8.3.10.0050.00323.60
8.3.00.0000.00821.82
8.2.290.0140.00520.55
8.2.280.0070.00318.62
8.2.270.0100.01017.16
8.2.260.0110.00718.66
8.2.250.0140.00718.48
8.2.240.0070.00318.97
8.2.230.0040.00722.58
8.2.220.0080.00024.06
8.2.210.0140.00026.77
8.2.200.0070.00418.16
8.2.190.0110.00416.88
8.2.180.0150.00016.50
8.2.170.0000.01422.96
8.2.160.0080.00619.51
8.2.150.0030.00524.18
8.2.140.0050.00524.66
8.2.130.0050.00326.16
8.2.120.0070.00021.11
8.2.110.0060.00322.10
8.2.100.0120.00018.03
8.2.90.0050.00317.84
8.2.80.0080.00319.19
8.2.70.0000.00918.04
8.2.60.0040.00418.34
8.2.50.0000.00818.10
8.2.40.0000.00719.47
8.2.30.0000.00720.63
8.2.20.0050.00518.18
8.2.10.0000.00718.31
8.2.00.0000.00721.18
8.1.330.0130.00521.86
8.1.320.0140.00916.26
8.1.310.0030.00716.34
8.1.300.0060.00317.91
8.1.290.0070.00330.84
8.1.280.0070.01425.92
8.1.270.0000.00820.88
8.1.260.0030.00526.35
8.1.250.0070.00028.09
8.1.240.0090.00023.96
8.1.230.0080.00322.68
8.1.220.0090.00017.78
8.1.210.0090.00018.77
8.1.200.0060.00617.23
8.1.190.0030.00617.22
8.1.180.0060.00318.10
8.1.170.0060.00318.48
8.1.160.0000.00818.81
8.1.150.0000.00818.88
8.1.140.0000.00818.90
8.1.130.0000.00717.39
8.1.120.0040.00417.43
8.1.110.0080.00017.36
8.1.100.0030.00317.46
8.1.90.0040.00417.44
8.1.80.0070.00017.36
8.1.70.0070.00017.50
8.1.60.0030.00617.59
8.1.50.0000.00817.57
8.1.40.0040.00417.41
8.1.30.0080.00017.63
8.1.20.0000.00717.67
8.1.10.0040.00417.47
8.1.00.0060.00317.55
8.0.300.0000.00821.82
8.0.290.0000.00916.75
8.0.280.0000.00818.43
8.0.270.0040.00417.17
8.0.260.0070.00016.84
8.0.250.0030.00316.79
8.0.240.0000.00616.88
8.0.230.0000.00716.93
8.0.220.0050.00316.87
8.0.210.0000.00616.84
8.0.200.0030.00316.75
8.0.190.0040.00416.89
8.0.180.0090.00016.89
8.0.170.0080.00016.85
8.0.160.0030.00516.87
8.0.150.0020.00516.86
8.0.140.0000.00816.84
8.0.130.0000.00813.25
8.0.120.0030.00616.93
8.0.110.0000.00816.80
8.0.100.0040.00416.95
8.0.90.0040.00416.70
8.0.80.0050.01116.90
8.0.70.0070.00016.74
8.0.60.0000.00816.84
8.0.50.0030.00416.72
8.0.30.0120.00716.86
8.0.20.0090.01017.40
8.0.10.0000.00816.87
8.0.00.0060.01116.85
7.4.330.0050.00015.55
7.4.320.0000.00716.59
7.4.300.0050.00216.64
7.4.290.0000.00716.51
7.4.280.0060.00316.53
7.4.270.0000.00616.45
7.4.260.0000.00716.64
7.4.250.0070.00016.49
7.4.240.0000.00716.52
7.4.230.0040.00416.40
7.4.220.0040.00416.39
7.4.210.0060.01016.64
7.4.200.0030.00316.50
7.4.160.0060.01316.48
7.4.140.0100.01117.86
7.4.130.0110.00716.76
7.4.120.0080.01116.55
7.4.110.0070.01016.47
7.4.100.0100.00716.55
7.4.90.0030.01516.44
7.4.80.0110.01119.39
7.4.70.0140.01116.55
7.4.60.0120.00316.51
7.4.50.0060.00616.53
7.4.40.0080.00916.68
7.4.00.0030.01315.07
7.3.330.0050.00013.13
7.3.320.0030.00313.25
7.3.310.0040.00416.38
7.3.300.0040.00416.28
7.3.290.0040.00416.30
7.3.280.0070.00716.37
7.3.260.0100.00716.44
7.3.240.0110.00916.47
7.3.230.0030.01516.33
7.3.210.0100.00716.54
7.3.200.0060.00916.52
7.3.190.0080.00816.39
7.3.180.0150.00916.52
7.3.170.0110.00416.35
7.3.160.0040.01816.35
7.3.120.0000.01414.97
7.3.110.0140.00014.93
7.3.100.0060.00914.81
7.3.90.0030.00614.63
7.3.80.0080.00814.97
7.3.70.0030.00614.65
7.3.60.0070.00314.89
7.3.50.0030.00614.67
7.3.40.0070.00714.88
7.3.30.0000.01314.85
7.3.20.0000.01416.45
7.3.10.0060.00916.87
7.3.00.0030.01216.55
7.2.330.0210.00316.73
7.2.320.0090.00916.64
7.2.310.0080.00816.75
7.2.300.0040.01416.56
7.2.290.0080.00816.81
7.2.250.0030.01314.96
7.2.240.0100.01015.23
7.2.230.0090.00614.84
7.2.220.0000.01615.32
7.2.210.0100.00715.18
7.2.200.0070.00415.05
7.2.190.0100.00714.89
7.2.180.0100.00714.93
7.2.170.0040.01415.06
7.2.90.4160.01014.82
7.2.80.4720.00014.82
7.2.70.3940.00315.01
7.2.60.0450.01415.37
7.2.50.3130.00714.76
7.2.40.3650.01014.80
7.2.30.2960.00714.95
7.2.20.3190.01414.78
7.2.10.3840.00314.93
7.2.00.3190.00614.77
7.1.330.0100.00715.97
7.1.320.0040.01215.70
7.1.310.0060.00915.76
7.1.300.0090.00615.70
7.1.290.0090.00615.84
7.1.280.0100.00715.91
7.1.270.0030.00615.60
7.1.260.0000.00815.58
7.1.210.6080.00313.91
7.1.200.3830.00714.04
7.1.190.3990.01314.08
7.1.180.2330.01014.11
7.1.170.3800.00713.95
7.1.160.3500.00313.95
7.1.150.3100.00313.75
7.1.140.3070.00713.63
7.1.130.3180.00613.79
7.1.120.3050.01313.80
7.1.110.3270.01313.62
7.1.100.3340.00313.56
7.1.90.3740.00313.77
7.1.80.3640.00313.91
7.1.70.3620.00713.89
7.1.60.4850.01031.96
7.1.50.5500.00331.80
7.1.40.5420.01031.78
7.1.30.0620.01732.00
7.1.20.0880.01032.05
7.1.10.2950.00313.72
7.1.00.2460.00913.96

preferences:
34.83 ms | 403 KiB | 5 Q