3v4l.org

run code in 300+ PHP versions simultaneously
<?php $json = '[{"_id":"123","books":[{"author":"John","title":"The Book"},{"author":"Smith","title":"Something!"}]},{"_id":"321","books":[{"author":"John","title":"The Book"}]}]'; $array = json_decode($json, 1); $ids = []; foreach($array as $v) { foreach($v['books'] as $book){ $books[] = $book; } } print_r($books); echo json_encode($books); ?>

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)
8.3.60.0180.00318.52
8.3.50.0100.00316.39
8.3.40.0000.01518.85
8.3.30.0110.00418.69
8.3.20.0040.00421.72
8.3.10.0040.00420.43
8.3.00.0030.00619.51
8.2.180.0070.00725.92
8.2.170.0110.00319.09
8.2.160.0130.00322.96
8.2.150.0060.00325.66
8.2.140.0080.00024.66
8.2.130.0040.00419.76
8.2.120.0070.00726.35
8.2.110.0060.00320.79
8.2.100.0060.00617.72
8.2.90.0040.00420.50
8.2.80.0000.00818.04
8.2.70.0040.00418.04
8.2.60.0040.00418.34
8.2.50.0080.00018.10
8.2.40.0070.00019.27
8.2.30.0000.00719.30
8.2.20.0040.00418.00
8.2.10.0070.00319.50
8.2.00.0040.00418.11
8.1.280.0140.00025.92
8.1.270.0050.00320.20
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0060.00323.84
8.1.230.0070.00420.95
8.1.220.0000.00917.79
8.1.210.0040.00418.85
8.1.200.0000.00817.35
8.1.190.0030.00517.35
8.1.180.0000.00818.10
8.1.170.0040.00418.66
8.1.160.0040.00418.90
8.1.150.0040.00418.89
8.1.140.0040.00418.80
8.1.130.0000.00720.25
8.1.120.0050.00217.50
8.1.110.0080.00017.49
8.1.100.0040.00417.49
8.1.90.0040.00417.49
8.1.80.0000.00717.47
8.1.70.0030.00717.37
8.1.60.0060.00317.61
8.1.50.0100.00017.54
8.1.40.0000.00817.43
8.1.30.0000.00817.48
8.1.20.0040.00417.61
8.1.10.0000.01217.56
8.1.00.0080.00017.51
8.0.300.0070.00019.84
8.0.290.0040.00416.88
8.0.280.0000.00818.48
8.0.270.0040.00417.17
8.0.260.0030.00318.36
8.0.250.0030.00516.91
8.0.240.0040.00416.87
8.0.230.0040.00416.95
8.0.220.0030.00316.81
8.0.210.0030.00316.90
8.0.200.0070.00016.84
8.0.190.0040.00416.94
8.0.180.0090.00016.89
8.0.170.0040.00416.93
8.0.160.0000.00716.98
8.0.150.0000.00816.86
8.0.140.0000.00716.75
8.0.130.0050.00013.21
8.0.120.0070.00016.69
8.0.110.0060.00316.84
8.0.100.0040.00416.91
8.0.90.0070.00016.93
8.0.80.0050.01616.91
8.0.70.0030.00516.93
8.0.60.0040.00417.02
8.0.50.0050.00316.95
8.0.30.0130.00517.20
8.0.20.0100.01017.36
8.0.10.0000.00716.96
8.0.00.0090.00916.67
7.4.330.0040.00015.55
7.4.320.0000.00816.59
7.4.300.0030.00316.63
7.4.290.0070.00016.55
7.4.280.0000.00816.58
7.4.270.0000.00816.52
7.4.260.0050.00316.61
7.4.250.0040.00416.39
7.4.240.0000.00816.61
7.4.230.0070.00016.59
7.4.220.0060.00016.50
7.4.210.0090.00916.56
7.4.200.0040.00416.66
7.4.160.0100.00616.48
7.4.140.0130.00317.86
7.4.130.0080.00816.48
7.4.120.0080.00816.55
7.4.110.0160.00716.68
7.4.100.0100.01016.47
7.4.90.0130.00316.47
7.4.80.0170.00019.39
7.4.70.0070.01016.50
7.4.60.0160.00316.40
7.4.50.0100.00716.46
7.4.40.0140.00316.64
7.4.00.0070.00714.89
7.3.330.0000.00513.21
7.3.320.0030.00313.04
7.3.310.0030.00516.18
7.3.300.0000.00716.35
7.3.290.0030.00316.31
7.3.280.0050.00916.22
7.3.260.0090.00916.53
7.3.240.0080.01416.38
7.3.230.0090.00916.48
7.3.210.0000.01716.66
7.3.200.0110.00516.48
7.3.190.0070.01016.45
7.3.180.0060.00916.53
7.3.170.0070.01316.45
7.3.160.0040.01316.29
7.3.120.0090.00314.80
7.3.110.0090.00914.88
7.3.100.0120.00314.61
7.3.90.0070.01014.88
7.3.80.0040.01114.71
7.3.70.0120.00314.55
7.3.60.0060.00914.68
7.3.50.0000.01214.78
7.3.40.0030.01014.55
7.3.30.0000.01614.91
7.3.20.0030.00716.65
7.3.10.0050.01316.65
7.3.00.0100.00716.58
7.2.330.0070.01416.53
7.2.320.0120.01216.90
7.2.310.0150.00816.91
7.2.300.0110.00716.69
7.2.290.0180.00316.61
7.2.240.0070.01114.91
7.2.230.0040.01115.21
7.2.220.0030.01314.89
7.2.210.0070.00714.81
7.2.200.0070.01114.89
7.2.190.0080.00814.89
7.2.180.0000.01114.98
7.2.170.0070.00715.23
7.2.160.0030.00614.67
7.2.150.0030.00816.85
7.2.140.0110.00516.94
7.2.130.0070.00416.68
7.2.120.0050.00716.86
7.2.110.0030.01017.01
7.2.100.0050.00716.91
7.2.90.0080.00617.04
7.2.80.0090.01016.72
7.2.70.0130.00716.80
7.2.60.0120.00516.89
7.2.50.0050.01017.02
7.2.40.0030.01316.85
7.2.30.0030.01317.09
7.2.20.0060.01116.91
7.2.10.0080.00616.94
7.2.00.0100.00416.89
7.1.330.0070.01015.66
7.1.320.0000.01815.70
7.1.310.0030.00915.54
7.1.300.0030.01015.71
7.1.290.0070.00315.45
7.1.280.0000.01415.93
7.1.270.0030.00615.77
7.1.260.0030.00615.91
7.1.250.0070.00715.90

preferences:
31.82 ms | 400 KiB | 5 Q