How to convert object data into json string in PHP? -

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I am getting results in the object and I have to change it in Jason and I do not understand that doing this I need help

<< p> << p> << p> << p>] = & gt; Chang Sindelar) [1] = & gt; Study Class Object ([user_id] = & gt; 84 [username]] = Sylvester Hillebrand))

and I convert to json string Want to I want some results in this way: 

  {"85": "Chang Sindelar", "84": "Ezekiel Watersson", "83": "Sylvester Hillebrand"}

No Idea

Thank you.

Using this function, your object will return to the array of properties of that object. 

  array get_object_vars (object $ object) returns get_object_vars ($ your_object_variable_here)

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