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I'm writing mostly in PHP, but one function requires me to use JavaScript. I need to access a PHP variable in my JavaScript. I've placed the following code between the <head> tags:

<script>
 $(document).ready(function(){
 $(document).keyup(function(e) {
 if ($('.pho_big').is(':visible') && e.keyCode==27) { 
 var js_link = '<?php echo $p_link; ?>';
 window.location.href = js_link;
 }
 });
 });
</script>

In short, when the esc key is pressed, I want to go to $p_link. So I'm trying to copy $p_link to js_link and go there. Instead of getting the contents of $p_link, my browser is trying to go to <?php%20echo($p_link)%20?>, which is obviously incorrect.

I've already gone here, here, and here, all of which seem to tell me to do exactly what I'm doing. My knowledge of JavaScript is near zero, so I'm probably missing something simple, but I don't know enough to know what or troubleshoot.

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  • It appears that $p_link is an empty string or something that echos to that. Also please note that the way your doing it PHP is creating JavaScript on page load and so JavaScript will have a hard value of what $p_link is at the time of the page render and not when the they key is pressed. If it's an echo problem try var_dumping it Commented Mar 10, 2015 at 5:23
  • After your edit, if your getting the literal tags in your JavaScript that means it's not actually not passing through PHP, probably because you ended your file in .js and not .php Commented Mar 10, 2015 at 5:25
  • in the (external) php file, $p_link is nothing more than a string of characters, with the occasional . and / The code I pasted is in a .tpl file (header.tpl), which is referenced in a .php file. Does that make a difference? Commented Mar 10, 2015 at 5:36
  • Anything that doesn't end in .php will not be interpreted. Also include and require can be thought of you just copying and pasting them inline into your file (from what I remember). Commented Mar 10, 2015 at 5:40
  • I've used include with my php code, but I don't understand how it would help here. If I used it to paste my php variable in the JavaScript, you're telling me it still wouldn't intepret. And if I could simply handle the keystroke in my php code, I would. Either way, I think I only need one or two lines, not an entire file. Commented Mar 10, 2015 at 5:47

1 Answer 1

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it looks like <?php echo $p_link; ?> is not interpreted by php.so js_link contains string <?php echo $p_link; ?>.when you set window.location.href to <?php echo $p_link; ?> . browser tries to go to [less_than]?php%20echo($p_link)%20?[greater_than] which is url encoding of <?php echo $p_link; ?>.

(sorry,since I have low reputation, I cant post comment)

answered Mar 10, 2015 at 5:31
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3 Comments

Yes, that's exactly what's happening, only with the actual [greater_than] tags in the url (I couldn't figure out how to make them appear normally here). WHY is that happening?
like @justGage told. your file might be ending with html or js extension.So php interpreter didn't had a chance to interpret it .check that file extension.
you can create a variable like <script>window.Js_link="<?php echo $p_link; ?>";</script>, somewhere in your php file (before including header.tpl) and use window.location.href=window.js_link; inside the event handling function.

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