Get column information from results of mysql query in php? -

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i trying print out column headers query entered. have other code connects database , prints results, having trouble line 

'$result .= $heading->name;'

i keep getting error:

'catchable fatal error: object of class mysqli_result not converted string in...'

could explain problem is? according php manual should give me right information. new php though, if improve code please explain how did it?

i have following code far gets result query: 

$result = mysqli_query($conn,$query); if($result){     if( mysqli_num_rows($result)>0){         $columnno = mysqli_num_fields($result);         for($i=0;$i<$columnno;$i++){             $heading = mysqli_fetch_field_direct($result,$i);             $result .= $heading->name;         }     } }

$result object being used mysqli. try append string onto end of it.

just use different variable name besides $result string in collect names of columns. or might save names in array this:

$var[] = $heading->name;

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