php - special char in JSON -

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I should send hi " to a Yahoo server, so in PHP, to be ", but it will get a bad JSON argument. How do i do it

$ message = "hi \" "; in the JSON code without any errors; $ Postdata = '{"Message": "'. $ Message. '"' ';

Hand-crafting JSON instead of use: 

  $ Postdata = json_encode (array ("message" => message $););   
 If you have to manually add your JSON, make sure to add a backslash before the quotation marks:  
  $ message = "hi \\\" "; // Or, more clearly ... $ message = 'Hi \\' ';

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