Firefox not showing results of my php code - php

Question

So I have problem with firefox not showing results of search form for query i enter, but code is working normally in Opera,Chrome,IE and Android default browser.
This is the search form :
<div id="menu_right">
<div id="searchBar">
<form id='search_form' method='POST' action='index.php?menu=search'>
<input id="topSearchText" class="inputText" type="text" name="movie" size="30" onfocus="this.value=''" value="Search" style="color: rgb(119, 119, 119);"/>
<input type="image" name="search_movies" value="Search" src="./images/search.png"/>
</form>
</div>
and this is the php part of the code:
<table width='100%' cellspacing='0' cellpadding='0' border='0'>
<tbody>
<tr>
<td class='normal_header' colspan='2'>Search Results</td>
<td class='normal_header' width='40' align='center' nowrap=''>Score</td>
</tr>
<?php
if(isset($_POST['search_movies']))
{
$movie=$tmdb->searchMovie($_POST['movie']);
foreach ($movie['results'] as $value) {
$filepath = $value['poster_path'];
$image_url = $tmdb->getImageUrl($filepath, TMDb::IMAGE_POSTER, 'w92');
echo "
<tr>
<td class='borderClass bgColor' width='50' valign='top'>
<div class='picSurround'>
<a href='http://www.themoviedb.org/movie/{$value['id']}'>
<img border='0' src='{$image_url}'>
</a>
</div>
</td>
<td class='borderClass bgColor' valign='top'>
<a href='http://www.themoviedb.org/movie/{$value['id']} '>
<strong>{$value['title']}</strong>
</a>
<a class='button_add' title='Quick add movie to my list' href='addmovie.php?id={$value['id']}'>add</a>
<div class='spaceit'>
<a href='http://www.themoviedb.org/movie/{$value['id']}'>Read more about: {$value['title']}</a>
</div>
</td>
<td class='borderClass bgColor' align='center'>{$value['vote_average']}</td>
</tr>";
}
}
?>
</tbody>
Is it something wrong with my query or maybe some tag because I cant seem to find the problem.

Answer 1

Have you checked the error_log that was possibly created?
Also.. and I might be wrong here.. but as far as I know php only interprets code between double quotes "", not between single quotes ''.
So for instance:
$test = 5;
echo "this string shows the value of $test"
echo 'this string just shows the string $test';

Answer 2

If this is a search form based on the results of the input field then it should be;
isset($_POST['movie'])

Answer 3

Look at this question :
HTML Input (type=image) not working on Firefox 4
Maybe your problem comes from the way firefox handles image's input tag.
Edit : More infos in the accepted answer to this question : Code working in Chrome but not in Firefox
This seem to be a common "problem" with image-type inputs.