3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(-1); mb_internal_encoding('utf-8'); $text = "1А роза упала на лапу Азора"; /* $text = "Я иду с мечем судия";*/ $text = "abcdefg"; $text = str_replace(" ", "", $text); $text = mb_strtolower($text); for ($i = 0; $i < mb_strlen($text); $i++) { $symbol1 = mb_substr($text, $i, 1); echo "Symbol1: ".$symbol1."\n"; $symbol2 = mb_substr($text, -$i, 1, 'utf-8'); echo "Symbol2: ".$symbol2."\n"; if ($symbol1 <> $symbol2) { echo "Это не палиндром\n"; $fake = true; break; } } if ($fake <> true) { echo "Это палиндром\n"; }

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)
8.4.140.0130.00717.45
8.4.130.0110.00817.65
8.4.120.0130.00720.34
8.4.110.0130.00918.64
8.4.100.0110.00617.66
8.4.90.0140.00617.78
8.4.80.0090.01217.71
8.4.70.0100.01017.76
8.4.60.0080.00220.20
8.4.50.0100.01019.45
8.4.40.0170.00319.17
8.4.30.0130.00719.57
8.4.20.0170.00317.48
8.4.10.0030.00619.21
8.3.270.0110.00816.61
8.3.260.0140.00916.41
8.3.250.0080.01116.99
8.3.240.0100.00916.51
8.3.230.0150.00416.32
8.3.220.0120.00416.99
8.3.210.0020.00516.45
8.3.200.0050.00416.49
8.3.190.0030.00519.02
8.3.180.0130.00616.50
8.3.170.0060.01217.20
8.3.160.0120.00620.39
8.3.150.0130.00616.56
8.3.140.0070.00317.09
8.3.130.0000.00818.22
8.3.120.0100.00018.66
8.3.110.0130.00620.94
8.3.100.0090.00024.06
8.3.90.0110.00416.62
8.3.80.0030.00619.36
8.3.70.0090.01216.58
8.3.60.0110.00416.50
8.3.50.0150.00322.03
8.3.40.0110.00418.75
8.3.30.0150.00018.67
8.3.20.0000.00720.34
8.3.10.0000.00820.06
8.3.00.0030.00523.45
8.2.290.0120.00618.88
8.2.280.0100.00822.00
8.2.270.0040.01117.18
8.2.260.0100.00016.57
8.2.250.0150.00616.46
8.2.240.0000.00818.66
8.2.230.0090.00622.58
8.2.220.0120.00437.54
8.2.210.0000.00826.77
8.2.200.0040.00418.88
8.2.190.0140.00716.63
8.2.180.0110.00718.42
8.2.170.0030.01018.91
8.2.160.0030.01020.39
8.2.150.0040.00424.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0000.00719.66
8.2.110.0090.00020.38
8.2.100.0090.00317.88
8.2.90.0110.00418.55
8.2.80.0030.00517.97
8.2.70.0000.00817.50
8.2.60.0030.00617.93
8.2.50.0040.00418.10
8.2.40.0080.00020.42
8.2.30.0050.00220.36
8.2.20.0070.00018.00
8.2.10.0040.00418.06
8.2.00.0040.00418.32
8.1.330.0100.00816.10
8.1.320.0070.01216.18
8.1.310.0060.01218.11
8.1.300.0060.00917.81
8.1.290.0060.00330.84
8.1.280.0120.00925.92
8.1.270.0060.00323.88
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0060.00321.02
8.1.230.0040.00817.70
8.1.220.0060.00317.74
8.1.210.0000.00818.77
8.1.200.0060.00317.35
8.1.190.0080.00017.35
8.1.180.0080.00018.10
8.1.170.0030.00618.63
8.1.160.0040.00418.86
8.1.150.0000.00720.18
8.1.140.0050.00219.55
8.1.130.0000.00719.01
8.1.120.0050.00217.53
8.1.110.0000.00717.50
8.1.100.0000.00717.54
8.1.90.0080.00017.55
8.1.80.0070.00017.55
8.1.70.0030.00317.48
8.1.60.0050.00317.53
8.1.50.0000.01117.61
8.1.40.0000.00817.64
8.1.30.0060.00317.75
8.1.20.0040.00417.61
8.1.10.0040.00417.47
8.1.00.0000.00717.42
8.0.300.0040.00418.77
8.0.290.0000.00716.75
8.0.280.0000.00718.41
8.0.270.0080.00017.27
8.0.260.0000.00618.59
8.0.250.0030.00317.03
8.0.240.0000.00817.00
8.0.230.0000.00716.93
8.0.220.0070.00016.98
8.0.210.0070.00017.00
8.0.200.0000.00817.01
8.0.190.0070.00017.03
8.0.180.0050.00216.84
8.0.170.0070.00017.00
8.0.160.0040.00416.96
8.0.150.0000.00716.78
8.0.140.0030.00616.87
8.0.130.0090.00013.39
8.0.120.0040.00416.85
8.0.110.0050.00316.97
8.0.100.0030.00616.73
8.0.90.0040.00416.84
8.0.80.0070.01016.90
8.0.70.0040.00416.82
8.0.60.0000.00716.81
8.0.50.0000.00816.99
8.0.30.0130.00517.08
8.0.20.0090.01117.40
8.0.10.0080.00016.87
8.0.00.0030.01816.96
7.4.330.0000.00515.55
7.4.320.0040.00416.57
7.4.300.0000.00616.47
7.4.290.0070.00016.55
7.4.280.0080.00016.46
7.4.270.0070.00016.65
7.4.260.0070.00316.61
7.4.250.0000.00716.63
7.4.240.0030.00316.73
7.4.230.0080.00016.76
7.4.220.0150.01016.66
7.4.210.0060.00816.54
7.4.200.0030.00316.45
7.4.160.0100.00816.47
7.4.150.0110.00717.40
7.4.140.0130.00717.86
7.4.130.0070.01316.51
7.4.120.0150.01016.50
7.4.110.0110.00716.53
7.4.100.0120.00616.67
7.4.90.0070.01016.46
7.4.80.0170.00019.39
7.4.70.0110.00716.59
7.4.60.0100.00616.45
7.4.50.0040.01116.36
7.4.40.0100.00716.59
7.4.30.0100.01316.50
7.4.00.0030.01314.68
7.3.330.0030.00313.29
7.3.320.0000.00513.32
7.3.310.0040.00416.45
7.3.300.0030.00316.23
7.3.290.0060.00016.43
7.3.280.0110.00716.36
7.3.270.0060.01317.40
7.3.260.0150.00316.55
7.3.250.0080.00816.47
7.3.240.0080.00916.38
7.3.230.0100.01016.58
7.3.210.0090.00616.35
7.3.200.0070.01016.64
7.3.190.0030.01616.42
7.3.180.0080.01316.36
7.3.170.0060.01216.64
7.3.160.0100.00716.46
7.2.330.0090.00916.83
7.2.320.0070.01316.81
7.2.310.0070.01016.78
7.2.300.0150.00916.72
7.2.290.0130.00316.65
7.2.60.0040.01117.00
7.2.50.0070.00316.89
7.1.200.0050.00515.68
7.1.70.0060.00617.31
7.1.60.0040.00717.41
7.1.30.0270.07338.27
7.1.20.0170.06038.24
7.1.10.0000.08022.21
7.1.00.0070.07022.33
7.0.200.0000.01316.53
7.0.170.0100.05721.95
7.0.160.0100.05721.79
7.0.150.0030.08321.89
7.0.140.0100.06021.89
7.0.130.0070.08021.77
7.0.120.0130.07021.96
7.0.110.0100.05721.75
7.0.100.0100.05021.89
7.0.90.0100.05721.82
7.0.80.0070.08021.77
7.0.70.0100.06021.80
7.0.60.0070.05321.80
7.0.50.0030.07321.95
7.0.40.0100.06321.80
7.0.30.0200.05721.84
7.0.20.0130.06321.70
7.0.10.0130.06721.87
7.0.00.0030.06021.78

preferences:
33.95 ms | 403 KiB | 5 Q