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  1. <?php
  2.  
  3. $a = 11;
  4. $b = 12;
  5.  
  6. $a+=+$b-$b=$a;
  7.  
  8. echo('$a = ' . $a . "\n");
  9. echo('$b = ' . $b . "\n");
  10.  
Success #stdin #stdout 0.02s 52432KB
stdin
Standard input is empty
stdout
$a = 12
$b = 11