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  1. <?php
  2.  
  3. $strings = ["folders/folder1/folder5/../../folder2", "folders/folder1/../../../folder2", "folders/folder1/folder5/../folder2"];
  4.  
  5. function make_path($string) {
  6. 	$parts = explode("/", $string);
  7. 	$new_folder = [];
  8. 	for ($i=0; $i<count($parts); $i++) {
  9. 		if ($parts[$i] == "..") {
  10. 			if (count($new_folder) === 0) {
  11. 				$new_folder[] = $parts[$i];
  12. 			} else {
  13. 				array_pop($new_folder);
  14. 			}
  15. 		} else {
  16. 			$new_folder[] = $parts[$i];
  17. 		}
  18. 	}
  19. 	return implode("/", $new_folder);
  20. }
  21.  
  22. $new_folders = array_map('make_path', $strings);
  23. print_r($new_folders);
  24. ?>
Success #stdin #stdout 0.02s 25636KB
comments (?)
stdin 
Standard input is empty
stdout 
Array
(
    [0] => folders/folder2
    [1] => ../folder2
    [2] => folders/folder1/folder2
)
https://ideone.com/E4zyrl
language:
PHP (php 7.3.5)
created:
2 years ago
visibility:
public

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