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Hello. I made a WordPress plugin with a JQuery-AJAX/JSON code in a php file like this: $(document).ready(function(){ $.post(“/wp-content/plugins/SLMS/UserRecord.php”, { saveUserBtn: “Save”, FName: fname, LName: lname, UNumber: unumber, address: address, contact: contact, email: email }, function(data, status){ document.getElementById(‘userr-page-notice’).innerHTML = data; if(data.includes(“New record saved.”)) { document.getElementById(“userRecord”).reset(); } }); }); /** end of code */ I also notice that any user can view my javascript code with their own browser. I also noticed that any user/unauthorized user can copy these JQuery-AJAX/JSON code and pass/save/modify data to MySQL database using the link to my php file. I will also write the code for my php file: if(isset($_POST[‘saveUserBtn’]) and $_SERVER[‘REQUEST_METHOD’] == “POST”) { insertRecord(); } elseif(isset($_POST[‘searchUNBtn’]) and $_SERVER[‘REQUEST_METHOD’] == “POST”) { searchUNRecord(); } elseif(isset($_POST[‘updateUserBtn’]) and $_SERVER[‘REQUEST_METHOD’] == “POST”) { updateRecord(); } /** codes to access MYSQL Database */ /** end of code */ I notice that many developers also used these kind of JQuery-AJAX/JSON codes. I want to know what is the code to block unauthorized users to access/pass data to my php file when unauthorized users use JQuery/JSON code. I will also mention “web host cpanel File Permission” to see if this web server configuration can help.