Multiple Select and foreach loop

[AL123]

I have been working from O'Rileys php5 book, looping through select menus.

That works fine with my single select menus: I post, the values change. But my multiple select menu

just prints to the screen and post does nothing. Here is my simple site:

 

http://nuke.empireindustry.com/Blogspiracy/Test/index.php

 

This is giving me a headache - probably something simple I just don't get.

AL123.

 

<?php // Controller for test Page.
include '../config.php';

$pizza = array('1' => 'Pepperoni', '2' => 'Canadian Bacon', '3' => 'Meat Medley');
$pSize = array('1'=>'Small', '2'=>'Medium', '3'=>'Large');
$tMulti = array('1'=>'Extra chese', '2'=>'Canadian Bacon', '3'=>'Sausage', '4'=>'olives');

function show_form()
{
// start form
echo "<form method='post' action='$_SERVER[php_SELF]' > "; 

	// pizza select menu
	echo "Select a Pizza:<select name='pizza'> ";
	foreach($GLOBALS['pizza'] as $val => $choice)
		{
			print "<option value=\"$val\">$choice</option> \n";
		}
	echo "</select><br /><br /> ";

	// size select menu	  
	echo "Size:<select name='pSize'> ";
	foreach($GLOBALS['pSize'] as $val => $choice)
		{
			print "<option value=\"$val\">$choice</option> \n";
		}	
	echo "</select><br /><br /> ";

	// extra topping menu
	echo "Extra Toppings:<select name='topMulti[]' multiple='multiple'> ";
	foreach($GLOBALS['tMulti'] as $val => $choice)
		{
			print "<option value=\"$val\">$choice</option> \n";
		}	
	echo "</select><br /><br /> ";

//end form
echo "Order:<input type='submit' NAME='button' value='Verify'>
			<input type='hidden' name='submit_check' value='1'>
	  </form> ";
}

function process_form()
{	
echo "<br />";
echo "Pizza: " . $_POST['pizza'];
echo "<br />";
echo "Size: " . $_POST['pSize'];
echo "<br />";
if($_POST){
foreach($GLOBALS['tMulti'] as $choice)
{
	echo "you chose $choice <br />";
}
}
show_form();
}

if($_POST['submit_check'])
{
process_form();
}

else
{
show_form();
}

 

[RussellReal]

foreach($GLOBALS['tMulti'] as $choice)

 

you're using your variable $tMulti which is just your array.. you're gonna want to loop through $_POST['topMulti'][0] like this:

 

<?php
  foreach ($_POST['topMulti'][0] as $v) {
    echo "You chose: {$v}\n<br />\n";
  }
?>

[AL123]

I changed the loop as you suggested and this error happens:

 

 

Warning: Invalid argument supplied for foreach() in /home/nuke/public_html/Blogspiracy/Test/ctrl.php on line 51

[AL123]

I almost fixed it with this:

if(array_key_exists){
foreach($_POST['topMulti'] as $val)
{
	echo "you chose: $val <br />";
}
}

now I just cant seem to correct this error:

Warning: Invalid argument supplied for foreach() in /home/nuke/public_html/Blogspiracy/Test/ctrl.php  on line 51

any suggestions on how to "do nothing" if no item is selected?
AL123

[RussellReal]

honestly I don't see how that loop works because the select's name is:

 

<select multiple="multiple" name="topMulti[]">

 

an array lol but if it does work.. than good on you.. just do something like this

 

if (count($_POST['topMulti'])) {

  // put the loop in here

}

[AL123]

That worked great! Thanks a lot, I was not aware of count(). AL123.

This is how it is now:

if(count($_POST['topMulti'])) {
foreach($_POST['topMulti'] as $val)
{
	echo "you chose: $val <br />";
}
}

[RussellReal]

Anytime Phpfreaks.com is full of information and great helpers, which can more than likely help you out! But if you're ever interested in getting help from me or just chatting, my MSN is in my signature