Question

What is the best way to just run a PHP script when the user clicks a button? It sends nothing back to the user whatsoever! (The PHP script only sends a PostgreSQL query.)

I have only found ways of returning data. I only want to run it.

Answer 1

This is the best I could come up with. Hope it was what you were looking for.

        /* Function that we create to handle backwards compatiblity to browsers.
    What it does is to try diffrent types of XMLHttpRequests. */
            function getXMLHttp() {
                var xmlHttp;
                try {
                    //Firefox, Opera, Safari, Chrome, IE7+
                    xmlHttp = new XMLHttpRequest();
                } catch (e) {
                    try {
                        //Internet Explorer 6
                        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
                    } catch (e) {
                        try {
                            //Internet Explorer 5
                            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
                        } catch (e) {
                            return false;
                        }
                    }
                }
                return xmlHttp;
            }
            // Here, we send the request
            function send() {
                /* We say the variable xmlHttp is the function 
                where we try the diffrent XMLHttpRequests*/
                var xmlHttp = getXMLHttp();
                    // We open your PHP file...
                xmlHttp.open("POST", "yourphpfile.php", true);
                    // ...and send it to the server
                xmlHttp.send();
            }

A little brief
Since you’re not getting anything back to the user, you use POST and not GET. It sends a request to the server to the file. And as you said in your question, something was sent to a PostgreSQL server. However, that PHP script is runned on your hosting server that supports PHP.