Requests_IRI::remove_dot_segments( string $input )
Remove dot segments from a path
Parameters
- $input
-
(Required)
Return
(string)
Source
File: wp-includes/Requests/IRI.php
protected function remove_dot_segments($input) {
$output = '';
while (strpos($input, './') !== false || strpos($input, '/.') !== false || $input === '.' || $input === '..') {
// A: If the input buffer begins with a prefix of "../" or "./",
// then remove that prefix from the input buffer; otherwise,
if (strpos($input, '../') === 0) {
$input = substr($input, 3);
}
elseif (strpos($input, './') === 0) {
$input = substr($input, 2);
}
// B: if the input buffer begins with a prefix of "/./" or "/.",
// where "." is a complete path segment, then replace that prefix
// with "/" in the input buffer; otherwise,
elseif (strpos($input, '/./') === 0) {
$input = substr($input, 2);
}
elseif ($input === '/.') {
$input = '/';
}
// C: if the input buffer begins with a prefix of "/../" or "/..",
// where ".." is a complete path segment, then replace that prefix
// with "/" in the input buffer and remove the last segment and its
// preceding "/" (if any) from the output buffer; otherwise,
elseif (strpos($input, '/../') === 0) {
$input = substr($input, 3);
$output = substr_replace($output, '', strrpos($output, '/'));
}
elseif ($input === '/..') {
$input = '/';
$output = substr_replace($output, '', strrpos($output, '/'));
}
// D: if the input buffer consists only of "." or "..", then remove
// that from the input buffer; otherwise,
elseif ($input === '.' || $input === '..') {
$input = '';
}
// E: move the first path segment in the input buffer to the end of
// the output buffer, including the initial "/" character (if any)
// and any subsequent characters up to, but not including, the next
// "/" character or the end of the input buffer
elseif (($pos = strpos($input, '/', 1)) !== false) {
$output .= substr($input, 0, $pos);
$input = substr_replace($input, '', 0, $pos);
}
else {
$output .= $input;
$input = '';
}
}
return $output . $input;
}