PHP Loops to Functions -

i understand looping through mysql tables for loops , extracting out data via if statements (among other things).

but trying better understand functions. keep simple , point of reference understand, used doing:

require 'get_member_email.php'//where $memberemail defined $query = "select * table something='something else'"; $results = mysql_query($query);  foreach ($results $data){       if ($memberemail == $data['member_email']{               $id = $data['member_id'];       } } 

i store script in file call website require (as file 'above' (where $memberemail defined), call both files webpage via:

require 'get_member_email.php';// $member email defined require 'get_memeber_id.php'; //where code above  echo "<h1>your member id is: $id</h1>"; 

1) how write functions 2) there benefit doing so? (rather keeping require , for loops)

1) okay question how write function.

function loopfunction() {     require 'get_member_email.php';     $query = "select * table something='something else'";     $results = mysql_query($query);      foreach ($results $data) {         if ($memberemail == $data['member_email']{           $id = $data['member_id'];         }     } } 

by doing can store process , call by

loopfunction(); 

2) yes there benefit of doing this. since define function dont have create process again. can call it.

this benefits when process needs repeated or re used in other cases.