PHP code not working in IE8 - php

Question

I've got a baffling IE8 PHP problem. The code below works fine in chrome and FF but not IE8. The form is submitting, errors are displayed if no search term or check-boxes selected, and if both db searches fail the No Actors and No Movies found echo's are both displayed. But if either one of the searches is successful nothing is displayed, not even the Actors/Movies found echo which has me stumped.
Here's the code:
<?php
if($_POST[submitbutton]){
$search = trim(mysql_real_escape_string($_POST[search]));
if(!$search){
echo "Please enter a search term!";
}else if(!$_POST['checkbox']){
echo "Please select at least one database to search!";
}else{
//search names
if(in_array("actors", $_POST['checkbox'])){
$query = mysql_query("SELECT name_id, realname, mainalias FROM names WHERE realname LIKE '%$search%' OR mainalias LIKE '%$search%'");
if(mysql_num_rows($query)==0){
echo "<h2>No Actors by that name found!</h2>", "<p>";
}else{
echo "<h2>Actors Found:</h2>";
while ($record = mysql_fetch_assoc($query)){
$realname = $record['realname'];
$name_id = $record['name_id'];
echo "<a href='index.php?page=name&id=$name_id'>", $realname, "</a><hr>";
}
}
}
//search titles
if(in_array("movies", $_POST['checkbox'])){
$query = mysql_query("SELECT title_id, title FROM titles WHERE title LIKE '%$search%'");
if(mysql_num_rows($query)==0){
echo "<h2>No Movies by that name found!</h2>", "<p>";
}else{
echo "<h2>Movies Found:</h2>";
while ($record = mysql_fetch_assoc($query)){
$title = $record['title'];
$title_id = $record['title_id'];
echo "<a href='index.php?page=title&id=$title_id'>", $title, "</a><br>";
echo "<hr>";
}
}
}
}
} //end post submitbutton
?>

Answer 1

Should
$search = trim(mysql_real_escape_string($_POST[search]));
be
$search = trim(mysql_real_escape_string($_POST['search']));
I don't know if that has anything to do with your problem, but it jumper out at me.

Answer 2

<?php
if(isset($_POST['submitbutton'], $_POST['search'])){ //use isset for check exists vars
$search = trim(mysql_real_escape_string($_POST['search'])); // ['POST vars']
if(!$search){
echo "Please enter a search term!";
}else if(!isset($_POST['checkbox'])){
echo "Please select at least one database to search!";
}else{
//search names
if(in_array("actors", $_POST['checkbox'])){
$query = mysql_query("SELECT name_id, realname, mainalias FROM names WHERE realname LIKE '%$search%' OR mainalias LIKE '%$search%'");
if(mysql_num_rows($query)==0){
echo "<h2>No Actors by that name found!</h2>", "<p>";
}else{
echo "<h2>Actors Found:</h2>";
while ($record = mysql_fetch_assoc($query)){
$realname = $record['realname'];
$name_id = $record['name_id'];
echo "<a href='index.php?page=name&id=$name_id'>", $realname, "</a><hr>";
}
}
}
//search titles
if(in_array("movies", $_POST['checkbox'])){
$query = mysql_query("SELECT title_id, title FROM titles WHERE title LIKE '%$search%'");
if(mysql_num_rows($query)==0){
echo "<h2>No Movies by that name found!</h2>", "<p>";
}else{
echo "<h2>Movies Found:</h2>";
while ($record = mysql_fetch_assoc($query)){
$title = $record['title'];
$title_id = $record['title_id'];
echo "<a href='index.php?page=title&id=$title_id'>", $title, "</a><br>";
echo "<hr>";
}
}
}
}
} //end post submitbutton
?>