3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php /** * Normalise a path, resolving empty, . and .. components, optionally against another path * * @param string $path * @param string $target * @return string */ function resolve_path($path, $relativeBase = null) { // Find separator in use and determine whether output path should be absolute $separator = strpos($path, '\\') !== false || strpos($relativeBase, '\\') !== false ? '\\' : '/'; $isAbsolute = (!isset($relativeBase) && ($path[0] === '/' || $path[0] === '\\')) || (isset($relativeBase) && ($relativeBase[0] === '/' || $relativeBase[0] === '\\')); // Create the base output array $target = $relativeBase !== null ? preg_split('#[\\\\/]+#', $relativeBase, -1, PREG_SPLIT_NO_EMPTY) : []; // Strip empty components and resolve . and .. foreach (preg_split('#[\\\\/]+#', $path, -1, PREG_SPLIT_NO_EMPTY) as $component) { switch ($component) { case '.': // current directory - do nothing break; case '..': // up a level array_pop($target); break; default: $target[] = $component; break; } } // Add a trailing empty element if path refers to a directory $lastChar = $path[strlen($path) - 1]; if ($lastChar === '/' || $lastChar === '\\') { $target[] = ''; } // Add a leading slash if path is absolute if ($isAbsolute) { array_unshift($target, $separator); } return implode($separator, $target); } $tests = [ '/foo/bar/./../baz' => null, ]; foreach ($tests as $path => $base) { $result = resolve_path($path, $base); echo " Path: $path Base: $base Result: $result "; }
Output for 5.4.0 - 5.6.28, hhvm-3.10.0, 7.0.0 - 7.1.0
Path: /foo/bar/./../baz Base: Result: //foo/baz
Output for hhvm-3.12.0
Warning: strpos() expects parameter 1 to be string, null given in /in/4EciU on line 13 Path: /foo/bar/./../baz Base: Result: \\foo\baz
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/4EciU on line 18
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/4EciU on line 18
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/4EciU on line 18
Process exited with code 255.