Question

I have the following javascript:

$(document).ready(function() {
    alert('hi');
    alert(<?php echo($_GET['ID'])?>);
});

When I have a url like url/?ID=222 everything works as I’d expect. When ID has a non-integer in it, url/?ID=222ff, the program crashes(no alerts)..What is going on here?

Answer 1

You should always wrap the value in quotes if you’re not sure of the data type:

alert("<?php echo($_GET['ID'])?>");

Note, the value returned from echo shouldn’t contain unescaped quotes, otherwise it would raise a syntax error.