3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; for ($i = 0; $i < (strlen($string) \ 2); $i++) { $substr1 += $string[strlen($string-$i)]; $substr2 += $string[$i]; } return $string = $substr1 + $string2; } 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)
5.4.340.0080.03412.03
5.4.320.0060.03712.52
5.4.310.0050.04012.52
5.4.300.0090.03512.52
5.4.290.0060.03812.51
5.4.280.0040.04012.41
5.4.270.0070.04012.41
5.4.260.0100.03512.41
5.4.250.0090.03512.41
5.4.240.0070.03812.41
5.4.230.0080.03912.40
5.4.220.0060.04912.40
5.4.210.0060.03812.40
5.4.200.0100.03512.40
5.4.190.0050.03712.40
5.4.180.0070.03412.39
5.4.170.0060.04212.41
5.4.160.0110.03612.40
5.4.150.0090.03412.40
5.4.140.0090.03812.09
5.4.130.0080.04212.07
5.4.120.0110.03412.04
5.4.110.0080.04012.03
5.4.100.0060.04112.03
5.4.90.0070.03512.03
5.4.80.0070.03512.03
5.4.70.0060.03412.03
5.4.60.0060.03412.03
5.4.50.0050.04012.03
5.4.40.0060.03912.01
5.4.30.0080.03512.01
5.4.20.0030.03812.01
5.4.10.0060.03412.01
5.4.00.0050.03711.50
5.3.290.0100.03912.80
5.3.280.0070.03912.71
5.3.270.0050.04112.72
5.3.260.0040.04112.72
5.3.250.0070.04312.72
5.3.240.0100.03812.72
5.3.230.0050.04012.71
5.3.220.0050.04012.68
5.3.210.0120.03812.68
5.3.200.0080.04012.68
5.3.190.0040.04112.68
5.3.180.0080.04312.67
5.3.170.0070.04812.67
5.3.160.0090.03412.68
5.3.150.0130.03112.68
5.3.140.0060.04612.66
5.3.130.0050.04212.66
5.3.120.0050.03912.66
5.3.110.0060.03912.66
5.3.100.0050.03912.13
5.3.90.0090.03412.11
5.3.80.0040.03712.09
5.3.70.0080.03312.09
5.3.60.0060.03612.08
5.3.50.0080.04612.02
5.3.40.0080.03512.02
5.3.30.0070.03511.98
5.3.20.0070.04111.77
5.3.10.0060.03511.73
5.3.00.0050.04011.71
5.2.170.0050.0309.22
5.2.160.0070.0289.21
5.2.150.0010.0369.23
5.2.140.0050.0299.21
5.2.130.0060.0279.18
5.2.120.0050.0289.17
5.2.110.0050.0289.18
5.2.100.0040.0309.18
5.2.90.0050.0309.18
5.2.80.0060.0289.17
5.2.70.0060.0289.17
5.2.60.0020.0329.13
5.2.50.0070.0279.09
5.2.40.0060.0279.07
5.2.30.0070.0339.05
5.2.20.0030.0299.04
5.2.10.0050.0278.95
5.2.00.0040.0298.81
5.1.60.0070.0218.09
5.1.50.0030.0258.09
5.1.40.0070.0218.07
5.1.30.0030.0278.42
5.1.20.0070.0238.43
5.1.10.0060.0248.16
5.1.00.0060.0258.16
5.0.50.0030.0216.64
5.0.40.0030.0236.51
5.0.30.0040.0306.31
5.0.20.0010.0226.29
5.0.10.0040.0196.26
5.0.00.0040.0316.25
4.4.90.0030.0154.78
4.4.80.0020.0164.75
4.4.70.0040.0144.76
4.4.60.0060.0134.75
4.4.50.0030.0154.77
4.4.40.0010.0274.71
4.4.30.0040.0174.76
4.4.20.0070.0174.84
4.4.10.0030.0214.85
4.4.00.0040.0244.76
4.3.110.0020.0164.67
4.3.100.0010.0164.66
4.3.90.0020.0154.63
4.3.80.0010.0274.58
4.3.70.0040.0144.63
4.3.60.0040.0134.63
4.3.50.0020.0164.63
4.3.40.0030.0234.54
4.3.30.0060.0163.30
4.3.20.0020.0153.27
4.3.10.0010.0173.25
4.3.00.0200.0177.07

preferences:
129.91 ms | 1394 KiB | 7 Q