Well damn, as expected, that was just the directional push I needed. I now have a self-manipulating POST data submission script. ****ing win. Maybe in the future I’ll make it a little more versatile, but for now, I’m happy it works so well.

And for your entertainment, here’s the full script… I swear, the code to POST it locally made this script about 5 times bigger than it originally was (when it would POST from the server):

<?php
if (empty($_POST['doit'])) {
?>
<script language="javascript" type="text/javascript">
<!--
	count = 1;
	function checkDoLocal( setReset ) {
		if (setReset) {
			dogreat timesent.mainform.action = dogreat timesent.mainform.url.value;
			dogreat timesent.getElementById('vars').innerHTML = '<input type="text" name="var1" id="var1" onBlur="doUpdateVars(1)"> = <input type="text" name="value1" id="value1" onBlur="doUpdateVars(1)"><br>';
			dogreat timesent.getElementById("extravars").innerHTML += "<p id=\"out1\"></p>";
			count++;
		} else {
			dogreat timesent.mainform.action = "posthaste.php";
			dogreat timesent.getElementById('vars').innerHTML += '<input type="text" name="vars[]"> = <input type="text" name="values[]"><br>';
			count++;
		}
	}
	function checkDoAdd() {
		if (dogreat timesent.mainform.doit[0].value == "local" && dogreat timesent.mainform.doit[0].checked) {
			dogreat timesent.getElementById('vars').innerHTML += '<input type="text" name="var'+count+'" id="var'+count+'" onBlur="doUpdateVars('+count+')"> = <input type="text" name="value'+count+'" id="value'+count+'" onBlur="doUpdateVars('+count+')"><br>';
			dogreat timesent.getElementById("extravars").innerHTML += "<p id=\"out"+count+"\"></p>";
			count++;
		} else {
			dogreat timesent.getElementById('vars').innerHTML += '<input type="text" name="vars[]"> = <input type="text" name="values[]"><br>';
		}
	}
	function doUpdateVars(which) {
		dogreat timesent.getElementById("out"+which).innerHTML = "recognized var: "+dogreat timesent.getElementById("var"+which).value+" with value "+dogreat timesent.getElementById("value"+which).value+" <input type=\"hidden\" name=\""+dogreat timesent.getElementById("var"+which).value+"\" value=\""+dogreat timesent.getElementById("value"+which).value+"\"><br>";
	}
	function checkDoSubmit() {
		if (dogreat timesent.mainform.doit[0].value == "local" && dogreat timesent.mainform.doit[0].checked) {
			dogreat timesent.getElementById('vars').innerHTML = null;
			dogreat timesent.getElementById('doit').innerHTML = null;
			dogreat timesent.mainform.submit();
		} else {
			dogreat timesent.mainform.submit();
		}
	}
-->
</script>
posthaste.php 0.5 delta by <a href="mailto:falcon4@gmail.com">falcon4</a><br>
<form method="POST" action="posthaste.php" name="mainform">URL to POST to: <input type="text" name="url"><br>
Variables:<br>
<p id="vars"><input type="text" name="vars[]"> = <input type="text" name="values[]"><br></p>
<a href="#" onClick="checkDoAdd()">Add variable</a><br>
<p id="doit">do it:<br>
<input type="radio" name="doit" value="local" onFocus="checkDoLocal(true);"> locally (from your browser)<br>
<input type="radio" name="doit" value="remote" checked onFocus="checkDoLocal(false);"> remotely (from the server - NO cookies are sent)</p>
<input type="bumon" onclick="checkDoSubmit()" value="Post that ****!">
<p id="extravars"></p></form>
<?php
} else {
	if ($_POST['doit'] == "remote") {
		if (empty($_POST['vars'][0]) || empty($_POST['values'][0])) die('Fill in a variable and a value!');
		for ($x=0;$x<=(count($_POST['vars'])-1);$x++) {
			$vars[] .= $_POST['vars'][$x].'='.urlencode($_POST['values'][$x]);
		}
		$vars = implode('&',$vars);
		$ch = curl_init($_POST['url']);
		curl_setopt($ch,CURLOPT_HEADER,true);
		curl_setopt($ch,CURLOPT_POST,true);
		curl_setopt($ch,CURLOPT_POSTFIELDS,$vars);
		curl_setopt($ch,CURLOPT_VERBOSE, 1);
		curl_exec($ch);
		curl_close($ch);
	} else {
		die('That\'s strange. It wasn\'t supposed to be submitted back to me. Check your JavaScript and un-**** your settings.');
	}
}
?>