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getJSON error in Firefox

<?php $searchText = $_REQUEST["searchText"]; ?>

 

<script type="text/javascript">

$('.facebookfeed').append('<p>Loading your results</p>');

  var url = 'https://graph.facebook.com/search?q=';

  var url = url+searchText.value;

  var url = url+'&type=post&limit=60&callback=?';      

    $.getJSON(url,function(json){

    console.log(data);

        var html = "<ul>";

            if (json.data == ''){html += '<li><h2>Sorry, no results were found. Try with another search term.</h2>'; }

        $.each(json.data,function(i,fb){

            if (!fb.message == ''){

                html += '<li><div class="box">'

                html += '<a href="http://www.facebook.com/'+ fb.from.id +'" target="_blank"><img src="https://graph.facebook.com/' + fb.from.id + '/picture" /></a>';

                html += '<p><span class="name"><a href="http://www.facebook.com/'+ fb.from.id +'" target="_blank">' + fb.from.name + '</a></span>  <br />';

                html += fb.message;

                html += '</p></div></li>';

 

            }

            });

        html += "</ul>";

        $('.facebookfeed').animate({opacity:0}, 500, function(){

                $('.facebookfeed').html(html);

                                                              });

        $('.facebookfeed').animate({opacity:1}, 500);

 

    });

 

 

</script>

       

Error: searchText is not defined

       

<script type="text/javascript">

    $('.facebookfeed').append('<p>Loading your results</p>');

    var searchText = "<?= $searchText?>";

    var url = 'https://graph.facebook.com/search?q=';

    url = url+searchText;

    url = url+'&type=post&limit=60&callback=?';  

    $.getJSON(url,function(json){

        ...    

    });

    ...

</script>