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  1. <?php
  2.  
  3. $subject = "One fish two fish red fish blue fish";
  4.  
  5. function str_replace_nth($search, $replace, $subject, $nth)
  6. {
  7. 	$found = preg_match_all('/'.preg_quote($search).'/', $subject, $matches, PREG_OFFSET_CAPTURE);
  8. 	if (false !== $found && $found > $nth) {
  9. 		return substr_replace($subject, $replace, $matches[0][$nth][1], strlen($search));
  10. 	}
  11. 	return $subject;
  12. }
  13.  
  14. echo str_replace_nth('fish', 'bla-bla-bla', $subject, 2);
  15.  
  16.  
Success #stdin #stdout 0.01s 52488KB
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stdin
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Standard input is empty
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One fish two fish red bla-bla-bla blue fish
https://ideone.com/5DLzQD
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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