Check if a string is valid JSON in php

A little function to check if a string is valid JSON (JavaScript Object Notation) or not. It takes json string as a parameter and returns true if it is valid otherwise returns false.

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 function isValidJson($string){
  $json = json_decode($string);
  return (is_object($json) && json_last_error() == JSON_ERROR_NONE) ? true : false;
 }
 
 #How to use

 if(isValidJson('{"a":1}')){
    echo "Valid Json";
 }else{ 
    echo 'Invalid Json' ; 
 }