Json_decode返回字符串（0）“”

Question

I am trying to pass data from ios to server.

Php code :

<?php
   $inputJSON = file_get_contents('php://input');
   $data = json_decode($inputJSON, TRUE);
   var_dump($data);
?>

This gives me string(0) "". I don't know whats the meaning of this.

        echo $inputJSON; gives nothing 
       var_dump($inputJSON); returns  string(0) ""

When i print the json-string it gives me a valid string

Please find the full codes of this problem in another question of mine

Cannot able to access json array in php , it returns null and Warning: Invalid argument supplied for foreach()

Answer 1

With God Grace solved my problem-

pass true to convert objects to associative arrays, so accessing numeric/associative array like this.

$var = $data[0]['key'];

Then we use a combination of numeric and associative array syntax to access the desired element in multidimensional array.

But if i trying to var_dump($data); is retun null.

Reference tutorial: http://www.dyn-web.com/tutorials/php-js/json/decode.php