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  1. <?php
  2.  
  3. $source = '{
  4. "foo": "bar", // Comentário 1
  5. "bar": 123 // Comentário 2
  6. }';
  7.  
  8. var_dump(json_decode($source), json_last_error_msg());
  9.  
Success #stdin #stdout 0.02s 26292KB
stdin
Standard input is empty
stdout
NULL
string(12) "Syntax error"