3v4l.org

run code in 300+ PHP versions simultaneously
<?php function do_split($name) { return preg_split('/([A-Z]{2,}|([A-Z][^A-Z]*))/', $name, null, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); } function convert_case($name) { return implode( '_', array_map( 'strtolower', do_split($name) ) ); } function convert_case2($name) { $output = ''; foreach ($i=0; $i<strlen($name); $i++) { $char = $name[$i]; print_r("{$char} " . json_encode(ctype_upper($char))); } return strtolower($output); } convert_case2('FooBARbar'); $samples = array( 'FooBar', 'FooBAR', 'FOObar', 'foo_bar', 'FOO_bar', 'foo_BAR', 'foo_Bar', 'Foo_bar', ); /* print_r(array_map(function ($name) { return array( 'name' => $name, 'split' => do_split($name), 'converted' => convert_case($name), ); }, $samples)); */

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)
5.4.310.0070.03612.52
5.4.300.0060.03512.53
5.4.290.0060.03712.52
5.4.280.0060.04212.42
5.4.270.0040.03812.41
5.4.260.0050.03812.41
5.4.250.0000.04212.42
5.4.240.0080.03312.41
5.4.230.0040.03812.41
5.4.220.0050.03612.41
5.4.210.0040.03612.41
5.4.200.0040.03912.41
5.4.190.0070.03412.40
5.4.180.0060.03512.40
5.4.170.0040.03812.41
5.4.160.0070.03512.41
5.4.150.0030.03712.40
5.4.140.0080.03312.09
5.4.130.0050.03512.07
5.4.120.0010.04112.04
5.4.110.0050.03512.04
5.4.100.0050.04012.04
5.4.90.0080.03312.04
5.4.80.0090.03912.04
5.4.70.0090.03112.03
5.4.60.0050.03412.04
5.4.50.0040.03712.03
5.4.40.0040.03512.02
5.4.30.0040.03712.02
5.4.20.0060.03612.02
5.4.10.0080.03812.02
5.4.00.0050.03511.51
5.3.280.0040.03812.71
5.3.270.0040.03912.73
5.3.260.0090.03712.72
5.3.250.0060.03612.72
5.3.240.0070.03412.72
5.3.230.0060.04312.70
5.3.220.0070.03812.68
5.3.210.0070.03712.68
5.3.200.0020.04012.68
5.3.190.0070.03912.68
5.3.180.0050.03712.68
5.3.170.0060.03812.66
5.3.160.0040.03712.67
5.3.150.0080.03512.68
5.3.140.0050.04012.66
5.3.130.0050.04212.66
5.3.120.0070.03912.66
5.3.110.0070.03812.66
5.3.100.0040.03812.13
5.3.90.0070.03412.11
5.3.80.0040.03712.10
5.3.70.0040.03712.10
5.3.60.0080.03312.09
5.3.50.0050.03612.03
5.3.40.0080.03412.03
5.3.30.0080.04811.99
5.3.20.0080.04211.77
5.3.10.0070.03511.74
5.3.00.0070.03511.72
5.2.170.0070.0329.23
5.2.160.0060.0289.23
5.2.150.0030.0329.22
5.2.140.0020.0349.22
5.2.130.0030.0319.18
5.2.120.0070.0259.18
5.2.110.0040.0299.19
5.2.100.0110.0269.18
5.2.90.0020.0319.19
5.2.80.0050.0299.18
5.2.70.0060.0329.18
5.2.60.0030.0309.14
5.2.50.0030.0319.11
5.2.40.0050.0289.08
5.2.30.0080.0319.05
5.2.20.0040.0299.04
5.2.10.0040.0278.95
5.2.00.0070.0268.81
5.1.60.0030.0258.09
5.1.50.0040.0248.09
5.1.40.0070.0218.08
5.1.30.0020.0278.42
5.1.20.0050.0258.45
5.1.10.0030.0268.17
5.1.00.0060.0238.17
5.0.50.0020.0226.65
5.0.40.0000.0226.52
5.0.30.0030.0326.32
5.0.20.0020.0206.29
5.0.10.0030.0206.27
5.0.00.0020.0316.27
4.4.90.0020.0154.77
4.4.80.0030.0154.75
4.4.70.0030.0154.76
4.4.60.0040.0144.76
4.4.50.0040.0144.77
4.4.40.0010.0264.71
4.4.30.0010.0174.76
4.4.20.0020.0164.85
4.4.10.0020.0164.85
4.4.00.0020.0254.76
4.3.110.0010.0174.67
4.3.100.0040.0134.67
4.3.90.0050.0144.63
4.3.80.0030.0234.58
4.3.70.0000.0164.63
4.3.60.0020.0144.63
4.3.50.0010.0164.63
4.3.40.0040.0224.54
4.3.30.0030.0153.30
4.3.20.0040.0143.28
4.3.10.0000.0173.25
4.3.00.0000.0237.21

preferences:
143.46 ms | 1394 KiB | 7 Q