php - Why do I need to reconnect to my database everytime when I use a custom function in the same file? -


this question has answer here:

i have normal php file , main program code above several functions below it. included connect file @ top once. of custom made functions below have queries, , these functions called in program above. there not understand: if not include connect file in function query in function won't work, if does. why need include connect file within each function?

i explain below:

this not work throws boolean mysqli_fetch , query errors though connected above in file outside function. why not work?

function queryprofileinfo($iduser){ $iduser=$_session['logged_in']['iduser']; $query ="select fnlname, username, gender, email, emailconfirmed, bio, avatar, followercount, followingcount, privatepublic profile iduser='$iduser' "; $response=mysqli_query($dbc, $query);     while($row =mysqli_fetch_array($response)){                      $username= $row['username']; } }

/*the next example works throws following errors because connected above in file

notice: constant db_user defined in c:\xampp\htdocs\theproject\connect.php on line 8

notice: constant db_password defined in c:\xampp\htdocs\theproject\connect.php on line 9

notice: constant db_host defined in c:\xampp\htdocs\theproject\connect.php on line 10

notice: constant db_name defined in c:\xampp\htdocs\theproject\connect.php on line 11

*/

    function queryprofileinfo($iduser){ include('connect.php');     $iduser=$_session['logged_in']['iduser'];     $query ="select fnlname, username, gender, email, emailconfirmed, bio, avatar, followercount, followingcount, privatepublic profile iduser='$iduser' ";     $response=mysqli_query($dbc, $query);         while($row =mysqli_fetch_array($response)){                          $username= $row['username'];     }     }

you need pass variable $dbc each function uses it, or declare using global variable writing global $dbc; in each function. latter solution not recommended, since later on may want have more 1 database connection.

see manual page: http://php.net/manual/en/language.variables.scope.php


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