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  1. <?php
  2.  
  3. $fn = 'filename.txt';
  4. $fn_parts = (array_reverse(explode("../", $fn)));
  5. echo (count($fn_parts) > 1 ? "../" : "./") . $fn_parts[0];
  6.  
  7. ?>
Success #stdin #stdout 0.02s 13064KB
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Standard input is empty
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./filename.txt
https://ideone.com/dn1HRj
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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