3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); //$strLengthHalf = round($strLength / 2); for ($i = 0; $i < $strLengthHalf = round($strLength / 2);; $i++) { var_dump($strLength-$i); var_dump($strLength / 2-$i); $substr1 .= $string[$strLength-$i]; $substr2 .= $string[$strLengthHalf - $i]; } //var_dump($substr1); //var_dump($substr2); return $string = $substr1.$substr2; } var_dump(reverse('12345'));

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)
5.4.340.0060.03812.03
5.4.320.0090.03612.52
5.4.310.0070.03912.52
5.4.300.0080.04412.52
5.4.290.0100.04812.51
5.4.280.0050.04112.41
5.4.270.0050.03912.41
5.4.260.0080.03612.41
5.4.250.0090.03512.41
5.4.240.0060.03912.41
5.4.230.0040.04012.40
5.4.220.0110.03312.40
5.4.210.0050.03812.40
5.4.200.0060.04412.40
5.4.190.0050.03712.40
5.4.180.0080.03412.40
5.4.170.0050.03612.41
5.4.160.0090.04012.40
5.4.150.0090.04512.39
5.4.140.0070.04712.09
5.4.130.0030.05012.07
5.4.120.0110.04512.04
5.4.110.0050.03912.03
5.4.100.0060.03612.03
5.4.90.0070.04212.03
5.4.80.0090.04212.03
5.4.70.0070.03412.03
5.4.60.0040.03612.02
5.4.50.0020.03912.02
5.4.40.0040.03612.01
5.4.30.0060.03512.01
5.4.20.0050.03712.00
5.4.10.0060.03812.01
5.4.00.0100.03311.50
5.3.290.0050.04112.80
5.3.280.0070.03712.71
5.3.270.0070.03912.72
5.3.260.0030.04312.72
5.3.250.0060.03712.72
5.3.240.0060.04712.72
5.3.230.0090.04512.71
5.3.220.0070.03712.68
5.3.210.0030.04412.68
5.3.200.0060.04012.68
5.3.190.0040.03812.68
5.3.180.0080.03512.68
5.3.170.0070.03512.67
5.3.160.0060.03712.67
5.3.150.0120.03212.67
5.3.140.0040.04212.66
5.3.130.0070.03812.66
5.3.120.0080.04012.66
5.3.110.0070.03712.66
5.3.100.0050.04112.13
5.3.90.0070.03712.11
5.3.80.0070.04512.09
5.3.70.0090.03512.09
5.3.60.0070.03512.09
5.3.50.0070.03912.03
5.3.40.0050.04012.03
5.3.30.0040.03711.98
5.3.20.0090.03811.77
5.3.10.0070.03411.73
5.3.00.0070.03511.72
5.2.170.0040.0319.22
5.2.160.0030.0319.22
5.2.150.0040.0319.22
5.2.140.0080.0339.22
5.2.130.0040.0299.18
5.2.120.0060.0299.18
5.2.110.0050.0299.18
5.2.100.0060.0279.18
5.2.90.0050.0299.18
5.2.80.0060.0289.17
5.2.70.0040.0299.17
5.2.60.0070.0289.13
5.2.50.0080.0279.10
5.2.40.0080.0299.08
5.2.30.0030.0329.05
5.2.20.0070.0279.04
5.2.10.0070.0358.95
5.2.00.0040.0298.80
5.1.60.0020.0258.09
5.1.50.0020.0268.09
5.1.40.0040.0248.07
5.1.30.0070.0238.42
5.1.20.0050.0258.44
5.1.10.0030.0268.17
5.1.00.0040.0258.16
5.0.50.0020.0216.65
5.0.40.0040.0196.50
5.0.30.0020.0326.31
5.0.20.0040.0186.29
5.0.10.0040.0196.26
5.0.00.0050.0296.25
4.4.90.0030.0154.78
4.4.80.0050.0134.75
4.4.70.0020.0164.76
4.4.60.0030.0154.75
4.4.50.0020.0164.77
4.4.40.0010.0264.71
4.4.30.0030.0154.76
4.4.20.0010.0174.84
4.4.10.0020.0164.85
4.4.00.0030.0244.76
4.3.110.0040.0154.67
4.3.100.0020.0164.66
4.3.90.0050.0194.63
4.3.80.0050.0234.58
4.3.70.0020.0214.63
4.3.60.0050.0184.63
4.3.50.0040.0214.63
4.3.40.0030.0324.53
4.3.30.0010.0173.31
4.3.20.0010.0173.29
4.3.10.0030.0143.25
4.3.00.0100.0236.91

preferences:
137.36 ms | 1394 KiB | 7 Q