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  1. <?php
  2. $name = "abc";
  3.  
  4. $counter = 1;
  5. if($pos = strrpos($name, '_')) {
  6.     $oldcounter = substr($name, $pos + 1);
  7.     if(is_numeric($oldcounter)){
  8.         $counter = $oldcounter + 1;
  9.         $name = substr($name, 0, $pos);
  10.     }
  11. }
  12.  
  13. $newname = $name . '_' . $counter;
  14.  
  15. print $newname;
  16. ?>
Success #stdin #stdout 0.02s 52472KB
comments (?)
stdin 
Standard input is empty
stdout 
abc_1
https://ideone.com/xR1v0j
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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