3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = 'odpuštěno'; $s = mb_strtolower($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)
8.3.60.0070.01016.88
8.3.50.0110.01121.99
8.3.40.0090.00918.86
8.3.30.0130.00319.09
8.3.20.0100.01020.04
8.3.10.0060.00323.65
8.3.00.0050.00521.01
8.2.180.0160.00316.63
8.2.170.0210.00322.96
8.2.160.0110.01122.38
8.2.150.0100.00724.18
8.2.140.0030.00624.66
8.2.130.0060.00326.16
8.2.120.0040.00818.08
8.2.110.0110.00022.08
8.2.100.0070.00718.00
8.2.90.0070.00319.30
8.2.80.0000.01017.97
8.2.70.0060.00317.88
8.2.60.0030.00618.04
8.2.50.0000.01018.07
8.2.40.0000.00920.01
8.2.30.0030.00618.12
8.2.20.0030.00617.92
8.2.10.0000.00918.29
8.2.00.0000.00917.93
8.1.280.0100.00725.92
8.1.270.0080.00820.85
8.1.260.0030.00626.35
8.1.250.0070.01428.09
8.1.240.0100.00024.04
8.1.230.0030.01019.20
8.1.220.0030.00717.88
8.1.210.0000.00918.77
8.1.200.0040.00817.60
8.1.190.0040.00417.48
8.1.180.0060.00318.10
8.1.170.0060.00318.77
8.1.160.0030.00622.09
8.1.150.0090.00019.11
8.1.140.0060.00319.33
8.1.130.0030.00517.94
8.1.120.0030.00617.62
8.1.110.0000.00917.56
8.1.100.0000.00917.51
8.1.90.0060.00317.54
8.1.80.0030.00617.60
8.1.70.0030.00517.46
8.1.60.0030.00717.80
8.1.50.0060.00317.73
8.1.40.0000.01017.69
8.1.30.0030.00717.76
8.1.20.0100.00017.71
8.1.10.0060.00317.70
8.1.00.0100.00317.72
8.0.300.0000.00818.77
8.0.290.0000.01016.88
8.0.280.0050.00318.54
8.0.270.0000.00817.42
8.0.260.0050.00517.37
8.0.250.0000.00917.12
8.0.240.0000.00817.14
8.0.230.0000.00817.14
8.0.220.0030.00617.09
8.0.210.0000.00917.09
8.0.200.0000.00917.14
8.0.190.0000.00817.14
8.0.180.0000.00917.12
8.0.170.0030.00616.98
8.0.160.0030.00717.10
8.0.150.0040.00416.97
8.0.140.0030.00616.93
8.0.130.0080.00013.46
8.0.120.0060.00317.03
8.0.110.0060.00317.02
8.0.100.0000.00916.93
8.0.90.0000.00916.98
8.0.80.0060.01216.99
8.0.70.0030.00617.09
8.0.60.0060.00316.92
8.0.50.0030.00716.91
8.0.30.0210.00717.10
8.0.20.0130.01017.40
8.0.10.0000.00917.06
8.0.00.0110.01916.69
7.4.330.0040.00415.13
7.4.320.0000.00916.64
7.4.300.0070.00316.70
7.4.290.0040.00416.69
7.4.280.0060.00316.52
7.4.270.0060.00316.76
7.4.260.0000.00916.60
7.4.250.0070.00316.70
7.4.240.0030.00616.69
7.4.230.0000.01016.48
7.4.220.0130.01016.79
7.4.210.0030.01616.63
7.4.200.0000.00916.52
7.4.160.0130.01616.48
7.4.150.0140.00717.40
7.4.140.0140.02217.86
7.4.130.0140.01116.65
7.4.120.0040.01916.49
7.4.110.0090.02116.59
7.4.100.0110.01116.59
7.4.90.0170.01716.35
7.4.80.0080.01616.70
7.4.70.0030.02316.71
7.4.60.0130.01016.57
7.4.50.0030.00616.66
7.4.40.0030.01716.52
7.4.30.0110.01816.70
7.4.00.0070.01014.96
7.3.330.0000.00813.48
7.3.320.0090.01313.47
7.3.310.0000.01016.64
7.3.300.0040.00416.48
7.3.290.0080.01116.60
7.3.280.0060.01216.58
7.3.270.0140.02317.40
7.3.260.0150.01116.61
7.3.250.0110.01716.66
7.3.240.0180.00616.43
7.3.230.0110.01116.63
7.3.210.0090.01816.67
7.3.200.0060.02219.39
7.3.190.0180.01216.61
7.3.180.0250.00016.35
7.3.170.0110.01816.67
7.3.160.0180.01316.68
7.2.330.0290.05216.91
7.2.320.0220.05816.59
7.2.310.0200.05716.61
7.2.300.0070.04516.75
7.2.290.0330.06316.88
7.2.60.0100.03116.57
7.2.00.0070.02819.68
7.1.200.0070.02815.72
7.1.100.0000.03318.25
7.1.70.0100.02017.50
7.1.60.0100.04819.46
7.1.50.0070.02416.85
7.1.00.0070.10322.57
7.0.200.0030.02415.13
7.0.140.0030.08722.01
7.0.60.0030.10319.93
7.0.50.0100.10317.84
7.0.40.0130.06720.19
7.0.30.0470.05720.13
7.0.20.0230.06020.16
7.0.10.0000.06720.01
7.0.00.0070.10320.22
5.6.280.0030.10020.89
5.6.210.0100.09720.52
5.6.200.0070.10718.08
5.6.190.0170.10720.67
5.6.180.0470.07320.56
5.6.170.0300.10320.33
5.6.160.0070.11020.43
5.6.150.0030.08318.17
5.6.140.0170.05018.15
5.6.130.0070.10318.11
5.6.120.0200.10321.09
5.6.110.0170.09021.11
5.6.100.0170.10721.01
5.6.90.0130.09320.97
5.6.80.0030.11020.39
5.5.350.0370.10020.29
5.5.340.0030.06317.98
5.5.330.0170.07320.17
5.5.320.0070.05720.18
5.5.310.0300.10320.34
5.5.300.0100.10717.88
5.5.290.0030.05717.89
5.5.280.0130.08020.77
5.5.270.0070.11320.78
5.5.260.0070.09720.64
5.5.250.0200.08320.44
5.5.240.0200.07720.18
5.4.450.0630.09019.62
5.4.440.0900.09019.27
5.4.430.0700.10719.60
5.4.420.1070.08319.34
5.4.410.0700.09719.36
5.4.400.0670.09019.00
5.4.390.0200.09718.68
5.4.380.0230.10318.48
5.4.370.0270.10018.49
5.4.360.0270.08718.51
5.4.350.0170.10018.56
5.4.340.0270.09718.71
5.4.320.0200.09718.48
5.4.310.0200.10718.48
5.4.300.0270.09318.65
5.4.290.0270.12318.73
5.4.280.0370.09318.49
5.4.270.0400.09718.64
5.4.260.0300.09018.55
5.4.250.0270.11018.45
5.4.240.0200.09018.59
5.4.230.0300.08318.64
5.4.220.0230.10018.70
5.4.210.0300.09318.70
5.4.200.0370.12316.56
5.4.190.0300.09018.54
5.4.180.0130.10318.64
5.4.170.0300.09018.66
5.4.160.0270.09318.75
5.4.150.0430.13718.65
5.4.140.0230.09016.31
5.4.130.0270.08716.16
5.4.120.0270.08016.04
5.4.110.0400.07316.32
5.4.100.0300.09016.22
5.4.90.0230.10316.16
5.4.80.0300.10316.12
5.4.70.0300.10016.29
5.4.60.0330.11316.17
5.4.50.0270.10016.21
5.4.40.0230.10716.29
5.4.30.0270.10316.05
5.4.20.0200.12716.31
5.4.10.0170.10716.13
5.4.00.0200.09315.62
5.3.290.0200.08714.73
5.3.280.0300.09314.68
5.3.270.0200.10014.55
5.3.260.0300.08314.50
5.3.250.0370.09014.66
5.3.240.0200.09314.54
5.3.230.0300.08314.61
5.3.220.0170.10014.55
5.3.210.0230.08314.66
5.3.200.0230.08014.60
5.3.190.0300.11314.51
5.3.180.0370.11714.48
5.3.170.0430.11314.46
5.3.160.0230.13314.61
5.3.150.0130.09314.55
5.3.140.0200.08314.45
5.3.130.0300.09714.46
5.3.120.0430.12714.64
5.3.110.0030.15014.60
5.3.100.0200.11713.96
5.3.90.0370.10714.02
5.3.80.0200.09313.93
5.3.70.0230.08314.01
5.3.60.0230.08313.92
5.3.50.0400.07313.94
5.3.40.0300.09313.89
5.3.30.0270.08313.85
5.3.20.0330.08313.78
5.3.10.0330.09013.64
5.3.00.0230.09313.63
5.2.170.0200.07011.09
5.2.160.0200.07311.18
5.2.150.0170.07711.20
5.2.140.0130.07711.12
5.2.130.0170.07311.14
5.2.120.0230.06311.09
5.2.110.0200.07711.25
5.2.100.0230.06711.25
5.2.90.0230.07311.08
5.2.80.0230.07711.07
5.2.70.0200.08311.13
5.2.60.0200.09011.02
5.2.50.0100.08311.07
5.2.40.0200.07010.98
5.2.30.0330.09311.03
5.2.20.0200.10010.98
5.2.10.0200.08010.95
5.2.00.0100.08310.81
5.1.60.0230.06310.15
5.1.50.0100.08010.03
5.1.40.0200.08010.09
5.1.30.0230.09710.46
5.1.20.0170.07310.43
5.1.10.0100.07010.14
5.1.00.0170.06710.13
5.0.50.0100.0738.66
5.0.40.0070.0678.45
5.0.30.0100.0778.30
5.0.20.0300.0708.43
5.0.10.0100.0938.24
5.0.00.0100.0878.36
4.4.90.0130.0675.95
4.4.80.0170.0775.91
4.4.70.0130.0635.91
4.4.60.0130.0675.94
4.4.50.0070.0575.99
4.4.40.0100.0775.99
4.4.30.0130.0575.89
4.4.20.0130.0636.01
4.4.10.0100.0536.03
4.4.00.0130.0836.42
4.3.110.0100.0575.91
4.3.100.0070.0575.91
4.3.90.0130.0775.96
4.3.80.0130.0705.87
4.3.70.0170.0575.85
4.3.60.0070.0535.98
4.3.50.0130.0705.85
4.3.40.0130.0735.84
4.3.30.0100.0834.68
4.3.20.0100.0634.61
4.3.10.0070.0634.57
4.3.00.0300.05014.42

preferences:
48.54 ms | 401 KiB | 5 Q