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  1. <?php
  2. 	$input = <<< EOF
  3. This is Before HELLO
  4.  
  5. @@MESsage@@
  6.  
  7. @@MESSAGE@@
  8.  
  9. Hello @@MESSAGE@@ssd
  10.  
  11. This is After
  12. EOF;
  13.     echo preg_replace('/\B@@MESSAGE@@\B/', 'replaced', $input);
  14. ?>
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
This is Before HELLO

@@MESsage@@

replaced

Hello @@MESSAGE@@ssd

This is After
https://ideone.com/BvFsZO
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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