jQuery外部函数需要一些PHP值

Question

In my external JavaScript file, I have the following jQuery code:

$(function(){
    $('#follow').on('click',function(){
        $.ajax({
            type: 'POST',
            url : 'functions/follow.php',
            data: {follower : session_id,
                   user : p_id,
            success: function(result) {
                if(result == 'followed'){
                    $('#follow').attr('id','unfollow').text('-Unfollow');
                }
            }
        });
    });
});

On my normal page, I have this:

var session_id = '<?php echo $_SESSION['id']; ?>',
    p_id = '<?php echo $p_id; ?>';

but this is not passing the variables into the jQuery function. I have these two variables being set before the JavaScript file is being called, also.

EDIT: I have tested this with the function on the same page as where the button is, and I passed in the PHP values with an echo, and it worked then.

Answer 1

You can create a namespace in the jquery object allowing access to it even inside events. Like so:

$.mynamespace = { 
    session_id: '<?php echo $_SESSION['id']; ?>',
    p_id: '<?php echo $p_id; ?>'
};

Then reference those namespace vars in your code like so:

$(function(){
    $('#follow').on('click',function(){
        $.ajax({
            type: 'POST',
            url : 'functions/follow.php',
            data: {follower : $.mynamespace.session_id,
                   user : $.mynamespace.p_id,
            success: function(result) {
                if(result == 'followed'){
                    $('#follow').attr('id','unfollow').text('-Unfollow');
                }
            }
        });
    });
});

This will also make them available for any other jQuery events/callbacks etc

(NB: Make sure your variables are being set before you try to use them, i.e. higher in the script)