jQuery variable undefined with php include -


i trying use variable in jquery wich included php, attr rel of img in footer.

i try use change attr src in same img in footer.

if use without include, works. include doesn't.

i ../img/undefined.svg result.

how can ../img/facebook.svg or ../img/twitter.svg ?

in php-file use:

<?php include '../include/header.php';?> <?php include '../include/footer.php';?>

in header.php javascript, jquery , html:

    <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1">  <link rel="stylesheet" type="text/css" href="../css/stijl.css"> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script> <script>     $(document).ready(function(){         $("footer img").hover(             function(){                 var src = $(this).attr('rel');             $(this).attr('src', '../img/' + src + '-n.svg');                 }         ,         function(){             var src = $(this).attr("rel");             $(this).attr('src', '../img/' + src + '.svg');         }         );     }); </script>

in footer.php html:

    <footer>     <div class="content">         <a rel="twitter" href="#">             <img src="../img/twitter.svg">         </a>         <a rel="facebook" href="#">             <img src="../img/facebook.svg">         </a>     </div> </footer>

$(this) refers img tag, has no rel attribute. parent tag, however, does. try:

var src = $(this).parent().attr('rel');

or if markup may change slightly, may more robust:

var src = $(this).closest('a').attr('rel');

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