AJAX to Manipulate Superglobal Arrays

[LostSole]

Hi guys,

 

I have come to a situation where I need to use AJAX to either create a new entry in $_POST, overwrite an value given the key or unset (remove it) from the array. I've written the javascript to send values to the external .php file below but I was wondering if you could help me to write the PHP to handle it....any help would be greatly appreciated!

 

Javascript to send values to AJAXupdatePOST.php

function oppositeSetVariable(elementName) {

element = document.getElementById(elementName);

if (element.checked == true) {
// create AJAX to 
	var newValue = 1;	
}
else {
	var newValue = 0;
}
alert(newValue);

// create AJAX to update $_POST[elementName] to equal newValue
var ajaxRequest2;
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest2 = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest2 = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest2 = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	ajaxRequest2.onreadystatechange = function(){
		if(ajaxRequest2.readyState == 4){
			// build string
			var ajaxDisplay2 = document.getElementById("AJAXresultDiv");
			ajaxDisplay2.innerHTML = ajaxRequest2.responseText;
		}
	}
	var queryString2 = "?elementName=" + elementName + "&newValue=" + newValue;
	ajaxRequest2.open("GET","AJAXupdatePOST.php" + queryString2,true);
	ajaxRequest2.send(null);  
}

 

 

[LostSole]

Hi,

 

I'd really appretiate some help on this, even if your not sure or have a suggestion that I could try. I simply dont know what to write in AJAXupdatePOST.php to modify the $_POST array. Do I have to send the Array to the file using the GET method, modify it and then send it back or something?

 

Thanks for your help in advance!

 

A VERY LostSole