3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = 'promiƈ'; $s = mb_strtolower($s, 'utf8'); $ln = mb_strlen($s, 'utf8'); $i = 0; do { $b = decbin($i); $p = strrev(str_pad((string) $b, $ln, '0', STR_PAD_LEFT)); $r = ''; for ($j = 0; $j < strlen($p); $j++) { $ch = mb_substr($s, $j, 1, 'utf8'); $r .= $p[$j] ? mb_strtoupper($ch, 'utf8') : $ch; } echo $r . "\n"; if ($p === str_repeat('1', $ln)) { break; } $i++; } while (true);

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)
8.3.60.0070.01118.43
8.3.50.0120.00722.06
8.3.40.0090.00618.94
8.3.30.0040.01119.28
8.3.20.0060.00320.04
8.3.10.0130.00621.73
8.3.00.0000.02020.96
8.2.180.0160.00016.63
8.2.170.0140.00022.96
8.2.160.0060.00922.38
8.2.150.0030.00624.18
8.2.140.0070.01324.66
8.2.130.0040.00426.16
8.2.120.0070.00320.10
8.2.110.0030.00722.50
8.2.100.0000.01218.00
8.2.90.0030.00519.53
8.2.80.0040.00417.97
8.2.70.0040.00417.50
8.2.60.0080.00018.17
8.2.50.0030.00618.07
8.2.40.0040.00418.34
8.2.30.0000.00918.18
8.2.20.0000.00817.83
8.2.10.0040.00418.11
8.2.00.0030.00617.93
8.1.280.0090.01225.92
8.1.270.0070.00320.91
8.1.260.0030.00526.35
8.1.250.0050.00328.09
8.1.240.0090.00024.05
8.1.230.0110.00019.22
8.1.220.0080.00017.91
8.1.210.0040.00418.77
8.1.200.0030.00617.47
8.1.190.0000.00817.48
8.1.180.0040.00418.10
8.1.170.0050.00318.69
8.1.160.0040.00422.13
8.1.150.0030.00519.05
8.1.140.0040.00419.27
8.1.130.0000.00718.07
8.1.120.0050.00217.56
8.1.110.0040.00417.50
8.1.100.0000.00717.50
8.1.90.0030.00617.59
8.1.80.0040.00417.52
8.1.70.0040.00417.54
8.1.60.0040.00417.82
8.1.50.0050.00317.70
8.1.40.0050.00317.74
8.1.30.0000.01017.86
8.1.20.0040.00417.78
8.1.10.0040.00417.70
8.1.00.0070.00317.64
8.0.300.0000.00818.77
8.0.290.0070.00016.88
8.0.280.0000.00718.63
8.0.270.0000.00717.44
8.0.260.0000.00917.37
8.0.250.0040.00417.17
8.0.240.0000.00817.10
8.0.230.0040.00417.15
8.0.220.0040.00417.02
8.0.210.0030.00317.17
8.0.200.0030.00317.11
8.0.190.0000.00717.13
8.0.180.0040.00417.11
8.0.170.0060.00317.13
8.0.160.0040.00417.11
8.0.150.0070.00017.08
8.0.140.0000.00717.03
8.0.130.0000.00613.45
8.0.120.0050.00316.93
8.0.110.0050.00217.06
8.0.100.0080.00017.11
8.0.90.0000.00716.91
8.0.80.0090.00617.00
8.0.70.0000.00816.94
8.0.60.0000.00716.96
8.0.50.0040.00417.01
8.0.30.0120.01017.15
8.0.20.0140.00917.41
8.0.10.0040.00416.93
8.0.00.0160.02016.84
7.4.330.0000.00515.09
7.4.320.0030.00316.72
7.4.300.0000.00716.54
7.4.290.0000.00816.51
7.4.280.0030.00316.71
7.4.270.0000.00816.73
7.4.260.0070.00016.71
7.4.250.0050.00316.67
7.4.240.0000.00716.70
7.4.230.0040.00416.71
7.4.220.0120.00816.64
7.4.210.0150.00316.83
7.4.200.0040.00416.52
7.4.160.0070.01016.71
7.4.150.0220.00917.40
7.4.140.0130.00817.86
7.4.130.0080.01116.54
7.4.120.0090.00916.59
7.4.110.0080.01216.51
7.4.100.0120.00616.77
7.4.90.0090.00916.64
7.4.80.0090.01116.79
7.4.70.0000.01716.53
7.4.60.0060.01016.49
7.4.50.0060.00316.59
7.4.40.0030.01516.37
7.4.30.0070.01016.75
7.4.00.0060.01015.09
7.3.330.0030.00313.45
7.3.320.0070.00713.34
7.3.310.0080.00016.64
7.3.300.0030.00316.41
7.3.290.0110.00516.58
7.3.280.0090.00616.55
7.3.270.0100.01617.40
7.3.260.0170.00316.83
7.3.250.0100.01116.56
7.3.240.0080.01116.48
7.3.230.0060.01216.55
7.3.210.0120.00616.84
7.3.200.0090.00919.39
7.3.190.0160.00416.54
7.3.180.0140.00916.36
7.3.170.0100.01016.72
7.3.160.0100.01316.32
7.2.330.0140.00916.59
7.2.320.0060.01416.86
7.2.310.0190.01616.75
7.2.300.0150.00716.90
7.2.290.0110.01216.49
7.2.60.0090.00617.34
7.2.00.0130.00819.31
7.1.200.0070.01016.00
7.1.100.0040.00818.48
7.1.70.0050.00817.31
7.1.60.0100.01719.46
7.1.50.0070.00716.94
7.1.00.0030.08022.37
7.0.200.0100.00315.09
7.0.140.0030.05021.95
7.0.60.0100.08321.71
7.0.50.0130.08017.82
7.0.40.0100.08720.03
7.0.30.0200.06720.33
7.0.20.0300.07320.30
7.0.10.0030.08020.18
7.0.00.0100.04320.31
5.6.280.0030.07720.89
5.6.210.0030.09320.63
5.6.200.0100.05718.19
5.6.190.0030.06020.48
5.6.180.0300.04320.63
5.6.170.0270.04020.66
5.6.160.0030.06320.33
5.6.150.0200.03318.18
5.6.140.0030.07318.14
5.6.130.0130.04718.11
5.6.120.0170.08021.00
5.6.110.0070.06021.11
5.6.100.0100.08320.98
5.6.90.0200.08020.96
5.6.80.0230.06320.36
5.5.350.0200.04020.30
5.5.340.0030.04017.98
5.5.330.0170.08020.15
5.5.320.0070.03720.24
5.5.310.0330.07320.51
5.5.300.0030.04318.04
5.5.290.0030.08717.95
5.5.280.0070.08020.84
5.5.270.0030.04720.95
5.5.260.0170.06720.72
5.5.250.0030.04020.49
5.5.240.0000.04320.24
5.4.450.0470.07319.54
5.4.440.0830.06719.61
5.4.430.1270.06719.48
5.4.420.1100.05719.57
5.4.410.1100.05719.41
5.4.400.0600.05718.96
5.4.390.0170.05718.69
5.4.380.0200.06318.69
5.4.370.0130.06318.45
5.4.360.0300.04318.61
5.4.350.0130.06718.69
5.4.340.0200.05318.74
5.4.320.0230.05318.52
5.4.310.0170.05718.63
5.4.300.0270.08018.45
5.4.290.0330.07018.49
5.4.280.0370.06718.71
5.4.270.0170.05718.60
5.4.260.0230.05018.55
5.4.250.0170.06018.54
5.4.240.0170.06318.47
5.4.230.0200.05318.61
5.4.220.0300.05018.62
5.4.210.0330.07018.44
5.4.200.0270.07316.53
5.4.190.0230.08018.49
5.4.180.0230.04718.61
5.4.170.0270.04718.49
5.4.160.0270.06718.75
5.4.150.0370.06018.54
5.4.140.0230.07016.17
5.4.130.0130.05716.13
5.4.120.0130.06016.22
5.4.110.0300.06716.19
5.4.100.0330.06716.08
5.4.90.0200.05316.24
5.4.80.0100.06016.30
5.4.70.0130.06016.17
5.4.60.0170.05716.29
5.4.50.0170.05016.22
5.4.40.0330.04316.22
5.4.30.0100.05716.06
5.4.20.0100.06016.12
5.4.10.0170.05316.16
5.4.00.0270.04715.62
5.3.290.0200.06314.66
5.3.280.0470.03314.54
5.3.270.0300.07714.54
5.3.260.0230.08014.69
5.3.250.0100.09314.63
5.3.240.0200.05314.52
5.3.230.0230.07314.57
5.3.220.0270.07314.55
5.3.210.0300.07314.57
5.3.200.0130.08714.54
5.3.190.0330.07014.66
5.3.180.0270.05714.56
5.3.170.0230.07714.60
5.3.160.0370.06314.59
5.3.150.0270.05314.54
5.3.140.0200.05714.48
5.3.130.0130.07714.47
5.3.120.0130.07314.53
5.3.110.0230.05314.53
5.3.100.0100.06314.12
5.3.90.0330.06314.11
5.3.80.0130.05314.11
5.3.70.0270.05313.93
5.3.60.0130.07013.91
5.3.50.0230.06014.02
5.3.40.0100.06014.02
5.3.30.0200.05013.98
5.3.20.0270.04313.67
5.3.10.0100.05713.59
5.3.00.0100.06013.71
5.2.170.0270.04011.18
5.2.160.0200.05311.20
5.2.150.0230.03711.18
5.2.140.0230.04311.20
5.2.130.0130.04711.02
5.2.120.0200.04711.24
5.2.110.0170.04011.11
5.2.100.0130.04311.08
5.2.90.0200.03711.26
5.2.80.0200.06011.06
5.2.70.0270.05311.14
5.2.60.0100.07011.21
5.2.50.0170.06311.00
5.2.40.0130.04711.04
5.2.30.0200.05711.11
5.2.20.0100.05010.91
5.2.10.0100.04710.86
5.2.00.0100.04710.82
5.1.60.0130.0479.97
5.1.50.0070.04310.13
5.1.40.0130.05710.06
5.1.30.0170.05310.45
5.1.20.0130.06010.47
5.1.10.0230.04310.18
5.1.00.0100.06010.11
5.0.50.0230.0278.63
5.0.40.0100.0308.41
5.0.30.0100.0478.29
5.0.20.0130.0308.26
5.0.10.0100.0408.24
5.0.00.0070.0508.26
4.4.90.0130.0275.90
4.4.80.0100.0235.90
4.4.70.0130.0205.90
4.4.60.0030.0275.94
4.4.50.0000.0375.91
4.4.40.0100.0375.91
4.4.30.0100.0375.92
4.4.20.0100.0376.00
4.4.10.0100.0276.01
4.4.00.0030.0405.97
4.3.110.0030.0435.82
4.3.100.0130.0235.88
4.3.90.0100.0205.80
4.3.80.0130.0435.85
4.3.70.0130.0305.83
4.3.60.0170.0275.86
4.3.50.0130.0305.82
4.3.40.0000.0575.80
4.3.30.0070.0274.63
4.3.20.0030.0334.56
4.3.10.0100.0274.54
4.3.00.0130.02014.42

preferences:
58.01 ms | 401 KiB | 5 Q