Give PHP value into Javascript in same page

Question

How can I give the ID value to Javascript in same page.

Example data :

<a href="" id="ctextarea<?php echo $uid; ?>"/>

JS :

function recountss()
        {
            var maxlen=280;
            var current = maxlen-$('#ctextarea').val().length;
            $('.counters').html(current);


            if(current<0 || current==maxlen)
            {
                $('.counters').css('color','#D40D12');
                $('input.comment_button').attr('disabled','disabled').addClass('inact');
            }
            else if (!$.trim($("#ctextarea").val())) {
                $('input.comment_button').attr('disabled','disabled').addClass('inact');
            }
            else
                $('input.comment_button').removeAttr('disabled').removeClass('inact');


            if(current<10)
                $('.counters').css('color','#D40D12');

            else if(current<20)
                $('.counters').css('color','#5C0002');

            else
                $('.counters').css('color','#C0C0C0');
        }

I tried using get class, but it's effect for 1 data not for many data. Have idea ?

Thanks.

Magus · Accepted Answer · 2012-11-22 13:18:31Z

2

This should work :

<script type="text/javascript">
    var id = "ctextarea<?php echo $uid; ?>";
</script>

In your javascript, you can do :

var current = maxlen-$(id).val().length;

But you should use an other name for your variable.

answered Nov 22, 2012 at 13:18

Magus

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4 Comments

Nagini Over a year ago

So how can I set that in my JS ?

Jeffrey Sweeney Over a year ago

@nagini that does set it in JS. Notice the script tags

Nagini Over a year ago

Still confused how can set that ? :(

Magus Over a year ago

When you are in a script tag, you are writing javascript. So i just use php to generate a javascript value and i store it in the id variable. Then in your javascript code, you can use the id variable.

Joshua · Accepted Answer · 2012-11-22 13:24:55Z

0

Try data- attributes:

<a href="somewhere.php" data-id="<?php echo $uid; ?>" id="link">Link</a>

In JS you can do the following:

document.getElementById('link').getAttribute('data-id');

This stuff is perfectly valid in HTML5 - but even older browsers just don't care.

answered Nov 22, 2012 at 13:24

Joshua

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1 Comment

Jeffrey Sweeney Over a year ago

I was about to write a similar answer, but I think that the anchor tag is just a dummy element to store a variable.

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