How can debugging tools like Firebug help identify issues with onclick events in PHP scripts?

Debugging tools like Firebug can help identify issues with onclick events in PHP scripts by allowing you to inspect the JavaScript code generated by PHP, check for errors or missing elements in the onclick event, and track the flow of data between PHP and JavaScript. By using Firebug's console and network tabs, you can see if the onclick event is being triggered correctly and troubleshoot any issues that may arise. 

<button onclick="myFunction()">Click me</button>

<script>
function myFunction() {
    alert("Hello World!");
}
</script>

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