mysql - PHP - creating JSON but header doesn't appear -


i'm creating json string results of mysql query in php. reason php "header" function isn't appending when save results file sanity checks. below code:

        header("content-type: application/json");      if(mysql_num_rows($result)){             $dataresults = '{"data":[';             $first = true;             $row = mysql_fetch_assoc($result);              while($row = mysql_fetch_array($result, mysql_assoc)){                     if($first) {                             $first = false;                     } else {                             $dataresults = $dataresults . ',';                     }                     $dataresults = $dataresults . json_encode($row);             }             $dataresults = $dataresults . ']}';     } else {             $dataresults = '[]';     }      file_put_contents('/applications/mamp/htdocs/php/results.json', $dataresults);

the output looks o.k., except missing "content-type: application/json". doing wrong?

why header() write file?

header() sets response header information using response hook in mod_php or whatever cgi equivalent if using cgi.

text files not contain meta information other encoding (if that).


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