<?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('#[\\\\/]+#', $relativeBase, -1, PREG_SPLIT_NO_EMPTY) : [];
var_dump($target);
// Strip empty components and resolve . and ..
foreach (preg_split('#[\\\\/]+#', $path, -1, PREG_SPLIT_NO_EMPTY) as $component) {
var_dump($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: $result
";
}
- Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /in/ig4oB on line 13
array(0) {
}
string(3) "foo"
string(3) "bar"
string(1) "."
string(2) ".."
string(3) "baz"
Path: /foo/bar/./../baz
Base:
Result: //foo/baz
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
- array(0) {
}
string(3) "foo"
string(3) "bar"
string(1) "."
string(2) ".."
string(3) "baz"
Path: /foo/bar/./../baz
Base:
Result: //foo/baz
- Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/ig4oB on line 18
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected '[' in /in/ig4oB on line 18
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/ig4oB on line 18
Process exited with code 255.
preferences:
270.28 ms | 401 KiB | 357 Q