In this example, creating a dynamic ViewBag object ‘ViewBag.States’, and adding a bunch of SelectListItems as properties.

 ViewBag.States = new List<SelectListItem>
               {
                	new SelectListItem { Text ="AK" },
	                new SelectListItem { Text ="AL" },
	                new SelectListItem { Text ="AR" },
	                new SelectListItem { Text ="AZ" },
	                new SelectListItem { Text ="CA" },
	                new SelectListItem { Text ="CO" },
	                new SelectListItem { Text ="CT" },
	                new SelectListItem { Text ="DC" },
	                new SelectListItem { Text ="DE" },
	                new SelectListItem { Text ="FL" },
	                new SelectListItem { Text ="GA" },
	                new SelectListItem { Text ="HI" },
	                new SelectListItem { Text ="IA" },
	                new SelectListItem { Text ="ID" },
	                new SelectListItem { Text ="IL" },
	                new SelectListItem { Text ="IN" },
	                new SelectListItem { Text ="KS" },
	                new SelectListItem { Text ="KY" },
	                new SelectListItem { Text ="LA" },
	                new SelectListItem { Text ="MA" },
	                new SelectListItem { Text ="MD" },
	                new SelectListItem { Text ="ME" },
	                new SelectListItem { Text ="MI" },
	                new SelectListItem { Text ="MN" },
	                new SelectListItem { Text ="MO" },
	                new SelectListItem { Text ="MS" },
	                new SelectListItem { Text ="MT" },
	                new SelectListItem { Text ="NC" },
	                new SelectListItem { Text ="ND" },
	                new SelectListItem { Text ="NE" },
	                new SelectListItem { Text ="NH" },
	                new SelectListItem { Text ="NJ" },
	                new SelectListItem { Text ="NM" },
	                new SelectListItem { Text ="NV" },
	                new SelectListItem { Text ="NY" },
	                new SelectListItem { Text ="OH" },
	                new SelectListItem { Text ="OK" },
	                new SelectListItem { Text ="OR" },
	                new SelectListItem { Text ="PA" },
	                new SelectListItem { Text ="RI" },
	                new SelectListItem { Text ="SC" },
	                new SelectListItem { Text ="SD" },
	                new SelectListItem { Text ="TN" },
	                new SelectListItem { Text ="TX" },
	                new SelectListItem { Text ="UT" },
	                new SelectListItem { Text ="VA" },
	                new SelectListItem { Text ="VT" },
	                new SelectListItem { Text ="WA" },
	                new SelectListItem { Text ="WI" },
	                new SelectListItem { Text ="WV" },
	                new SelectListItem { Text ="WY" },
              };

Error message similar to this?:

mkmf.rb can’t find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h

Solution: Reinstall Xcode.   To verify this problem,  you can run ‘which make’ from terminal and most likely you will receive no response if you are getting the missing header file error.

Found a very useful post that addressed this, with a pretty simple fix by editing the .project file:

Change buildCommand name to:
org.eclipse.php.core.PhpIncrementalProjectBuilder

And natures to:
org.eclipse.php.core.PHPNature

Refresh/Rebuild and Zend/Eclipse will once again be as helpful (or annoying) as ever.

Javascript: (using jquery javascript library)

var selections = new Array;
var userSelections;
$('#multipleSelection :selected').each(function(i, selected) {
selections[i] = $(selected).val();
});
userSelections = selections.join(",");


In the PHP script, it’s just a matter of processing the individual elements of the array. Depending on how you sent the ajax request (POST/GET).

PHP Example:

$selectionsArray = explode(',',$_GET['userSelections']);

foreach($selectedArray as $index=>$value) {
echo $index ." = ".$value;
}