چاپ آخرین اروری که رخ داده است:

<?php
// An invalid json string
$string =  "{'Peter':35,'Ben':37,'Joe':43}";

echo "Decoding: " . $string;
json_decode($string);
echo "<br>Error: ";

switch (‎json_last_error()‎‎)  {
  case JSON_ERROR_NONE:
    echo "No errors";
     break;
  case JSON_ERROR_DEPTH:
    echo "Maximum  stack depth exceeded";
    break;
  case  JSON_ERROR_STATE_MISMATCH:
    echo "Invalid or  malformed JSON";
    break;
  case JSON_ERROR_CTRL_CHAR:
     echo "Control character error";
    break;
   case JSON_ERROR_SYNTAX:
    echo "syntax error";
    break;
  case JSON_ERROR_UTF8:
     echo "Malformed UTF-8 characters";
    break;
   default:
    echo "Unknown error";
     break;
}
?>