$myFieldVar = $_POST['form']['myField'];

print_r($_POST['form']);
die();
//This will give you a human readable array of the data in you just posted in your form 

/*
// loop through the post array //
// $key is the name/id of your field // 
 // $value is the value of your field // 
*/
foreach($_POST['form'] as $key=>$value){ 
	$k = $key; // $k is now =to the id of the field, for example email 
	$$k = $value; // $$k sets your new variable, i.e. $email, to the value of email on the form 
}

// Supposing you have a field with id of 'email', you can go ahead and use $email in your script
echo $email; // OR
die($email); // TO CHECK IT'S WORKING
// Now, you're inserts/updates can be written easily and consistently.

// LOOP THE FORM DATA TO SET VARS
foreach($_POST['form'] as $key=>$value){ // loop thru ur post array
	$k = $key; // set a variable to the 'name' of your key - $k now = your field id/name
	$$k = $value; // Yes, 2 dollar signs - this sets a variable with your fields name to its value in the post array
} // END LOOP THROUGH THE FORM KEY=>VALUES
// You might want to add die statement to prevent any emails and other actions being triggered whilst you debug. Uncomment Below
// die();

// LOOP THE FORM DATA TO SET VARS
foreach($_POST['form'] as $key=>$value){ // loop thru ur post array
	$k = $key; // set a variable to the 'name' of your key - $k now = your field id/name
	$$k = $value; // Yes, 2 dollar signs - this sets a variable with your fields name to its value in the post array
 
	// DEBUGGING - comment this block (down to and including "}// END DEBUG" lines
	//This will echo/print everything to screen so you can check a variable has been  created for all of your fields
	if (!is_array($value)){
		echo "$$k = ";
		//echo just the value
		echo "$value<br>";
	}else{ // Otherwise print the key name like $myVar and print the array
		echo "$".$key." = ";
		print_r($value);
		echo "<br>";
	}// END DEBUG	
} // END LOOP THROUGH THE FORM KEY=>VALUES
// You might want to add die statement to prevent any emails and other actions being triggered whilst you debug. Uncomment Below
// die();

// LOOP THE FORM DATA TO SET VARS
foreach($_POST['form'] as $key=>$value){ // loop thru ur post array
	$k = $key; // set a variable to the 'name' of your key - $k now = your field id/name
	$$k = $value; // Yes, 2 dollar signs - this sets a variable with your fields name to its value in the post array
/*
	// DEBUGGING - comment this block (down to and including "}// END DEBUG" lines
	//This will ech/print everything to screen so you can check a variable has been  created for all of your fields
	if (!is_array($value)){
		echo "$$k = ";
		//echo just the value
		echo "$value<br>";
	}else{ // Otherwise print the key name like $myVar and print the array
		echo "$".$key." = ";
		print_r($value);
		echo "<br>";
	}// END DEBUG	
*/
} // END LOOP THROUGH THE FORM KEY=>VALUES
// You might want to add die statement to prevent any emails and other actions being triggered whilst you debug. Uncomment Below
// die();

// Use the following MYSQL function around your $variables in any queries like...
'".mysql_real_escape_string($myVar)."'

if (is_numeric($myID)){
         // Then insert it
} else {
         // Throw an error to warn the user that something went wrong like
         die($myErrorMessage); 
}

//==================================//
// For select lists where the user can only select 1 value/option
//==================================//
$mySelectValue[0]; // Where 'mySelectValue' is the ID of your form field.

//==================================//
//Where [1] (the second checkbox option) is the one you want to do something with
// remember they start at [0]
//==================================//
if(isset($myCheckbox[1])){ 
    // do something with $myCheckbox[1] (AND/OR any other variables you've access to)
    echo "$myCheckbox[1]";
} 

//==================================//
// Where [membership_package1] (the second checkbox option is the one you want to do something with
// and the value is the name of the package
//==================================//
if(isset($myCheckbox['membership_package1'])){ 
             echo "You've chosen to join the " .$myCheckbox["membership_package1"]. " Members Package"; 
         }

// you can check if a var is an ARRAY like
if(is_array($myCheckbox)){
     // do something with $myCheckbox
     print_r($myCheckbox); // This will display a human-readable array on the page
} 
//==================================//
// you can count an ARRAY like
//==================================//
count($myCheckbox);  // OR add it to a $var like:
$chkdCount = count($myCheckbox);
 
//==================================//
// combine a check for ARRAY and count - maybe if you wanted do something else if at least x number of options selected
//==================================//
$x = 1; // this is a numeric value - whatever you want to check against
// $selectedMemberships  was auto-created using the original script/thread from checkbox field called 'selectedMemberships'
if(count($selectedMemberships)==$x){ // if only 1 selected
	foreach($selectedMemberships as $m_id=>$m_name){
	     echo "You chose to join the $m_name mebers plan"
	}// END FOR EACH
}elseif(count($selectedMemberships)==0){ // if there aren't any memberships selected
     echo "You chose not to join at the moment. ";
}else{ // The user selected multiple memberships
     // lets count them
     $chkdCount = count($myCheckbox); // now we can use this to neaten up our dynamic feedback to the user
     // initialise a counter. We'll increment this each time until 1 less than the count in order to place "and" between the
     // last and last but one selected package
     $i = 0;
 
     // now we need to loop through each element of the array to get the values 
     foreach($selectedMemberships as $membership_id=>$membership_name){ 
          // these could be"... as $anything=>$you_like ..."
 
          // increment by 1
          $i++; // same as $i = $i + 1;
 
          // Lets build a string out of the names to tell the user which memberships they chose
          if(($chkdCount-$i) >= 2){ // if total selected - the iteration through loop is greater than/= to 2
               $members_plans .= "$membership_name, "; // add to string with a comma
          }elseif(($chkdCount-$i) == 1){ // if it's 1 - it's the last but 1 
             $members_plans .= "$membership_name and "; // - add and instead of comma
          }else{
             $members_plans .= "$membership_name <br />"; // it's the last, let's add a line break
          }
     }// END FOR EACH LOOP - all our values are now in the string
	echo "You've chosen to join the $members_plans Members Packages";
}// END ELSE 

// this line should go directly after
// where you execute the insert 
$myNewRow = $db->insertid();