php - http_build_query not correctly encoding my post fields -


it's strange issue i'm facing. here curl request i'm sending: 

    $fields = array(         'action' => 'json',         'region' => '',         'states' => array('tx'),         'start' => '4/2/2010',         'end' => '4/2/2017',         'internalcomments' => 'no'     );     $fields_string = http_build_query($fields);      $ch = curl_init($url);     curl_setopt($ch,curlopt_returntransfer, true);     curl_setopt($ch,curlopt_post, count($fields));     curl_setopt($ch,curlopt_postfields, $fields_string);     $jsonresult = curl_exec($ch);     curl_close($ch);

however, when i'm printing out content of $fields_string, see trademark icon in query string:

action=json®ion=&states%5b0%5d=al&states%5b1%5d=tx&start=04%2f01%2f2010&end=04%2f07%2f2017&internalcomments=no

notice ® icon after word json? idea that's coming from?


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