Use PHP variable in Javascript/jQuery

Question

Why can't I use a calculated number, from php in jQuery?

I've tried this:

<div id="time">
    <? echo until();?>
</div>
var until = $("#time").html();

And

var until = <? echo until();?>;

But no one works D:

EDIT: The calculated number will be 472541, and the function:

<?
/**
* @desc Time until tuesday
* @param string Time format
* @return string timestamp
*/
function until($format = ""){
    $now = strtotime("now");
    $nextTuesday = strtotime("-1 hour next tuesday");
    $until = $nextTuesday - $now;
    if(empty($format)){
        return $until;
    }else{
        return date("$format",$until);
    }
}

?>

EDIT EDIT: Don't know what just happend, but it seems to work now :O :D Thanks a lot, everyone :D

Please update your answer in order to get (doog) help: What is happening (or should happen) What error(s) do you get? etc? — Veger
– Veger, Commented Aug 10, 2011 at 16:38
What does the until() function look like? Also, is "short_open_tag" set to "1" in php.ini? — Jason Fuller
– Jason Fuller, Commented Aug 10, 2011 at 16:41
Aside from the problem, 'hideorshow' is a bad name for a field. just call it 'hide' or call it 'show'. That makes it obvious what a '1' will mean to anyone else who has to work with this db. 'hideorshow' makes the 1/0 values completely ambiguous — Marc B
– Marc B, Commented Aug 10, 2011 at 16:46

ntgCleaner · Accepted Answer · 2011-08-10 16:52:15Z

1

The way I have been pulling PHP values from something like this into a variable is to make a new attribute in the DIV, something like

<div id="time" value="<?= until(); ?>">

</div>

then, by using JQuery, I can pull the variable by saying

var until = $('#time').attr(value);

edited Aug 10, 2011 at 16:52

answered Aug 10, 2011 at 16:45

ntgCleaner

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1 Comment

ntgCleaner Over a year ago

and you made sure the $variable can echo properly in the first place? I guess I meant to say $variable is until(); I will edit the above to show this

SunnyRed · Accepted Answer · 2011-08-10 16:48:43Z

0

Did you try it inside a script block, like so:

<script type="text/javascript">
/* <![CDATA[ */

    var until = <?php echo until();?>;
    alert(until);

/* ]]> */
</script>

edited Aug 10, 2011 at 16:48

answered Aug 10, 2011 at 16:38

SunnyRed

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3 Comments

Mobilpadde Over a year ago

Yea, just didn't want to write it down (Too lazy)

SunnyRed Over a year ago

and what is printed to the html, if you echo your until() result there?

SunnyRed Over a year ago

last but not least, what do you see, if you add an alert right after the definition of the variable?

zod · Accepted Answer · 2011-08-10 16:40:12Z

0

can you try this

  <? $output =until();  echo $output?>

var until = <? echo $output ?>;

answered Aug 10, 2011 at 16:40

zod

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Comments

Marc B · Accepted Answer · 2011-08-10 16:43:18Z

0

If you want to echo out the results of the until function, the function would have to actually return something. The following would work perfectly.

function until() {
    return '1';
}

<script type="text/javascript">
    var until = <?php echo json_encode(until()); ?>;
</script>

Note the use of json_encode(). While not necessary in this case, since it'd just output a '1'. using json_encode in general is a good idea, as it guarantees that whatever's coming out of PHP will be syntactically valid Javascript. It's very easy to generate Javascript on the fly that contains syntax errors, which will kill the rest of your script immediately.

answered Aug 10, 2011 at 16:43

Marc B

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Comments

Madara's Ghost · Accepted Answer · 2011-08-10 16:55:34Z

0

First things first, you shouldn't be using shorthand <?php ?> tags, it's not recommended. And second, I can't trace your problem, really.

http://codepad.viper-7.com/ufrfYR

answered Aug 10, 2011 at 16:55

Madara's Ghost

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