我的PHP注册脚本有困难

当这个脚本遇到一系列检查电子邮件和密码长度的"if"语句时，它似乎会挂断。如果我删除这些语句，它就会正确地将数据插入数据库。

<?php 
ob_start();
session_start();
if (!empty($_POST['email']) && !empty($_POST['password']) && !empty($_POST['confirmpassword'])) {
$email = strip_tags($_POST['email']);
$password = md5(strip_tags($_POST['password']));
$confirmpassword = md5(strip_tags($_POST['confirmpassword']));
$errors = array();
if (strlen($email) < 6) {
    $errors[] = "Email too short.";
}
if (strlen($email) > 25) {
    $errors[] = "Email too long.";
}
if (strlen($password) < 2) {
    $errors[] = "Password too short.";
}
if (strlen($password) > 25) {
    $errors[] = "Password too short.";
}
if ($password !== $confirmpassword) {
    $errors[] = "Passwords do not match.";
}
if (count($errors) == 0) {
    // Include database config file then connect to database
    require('db_config.php');
    $connection = mysql_connect(DB_HOST,DB_USERNAME,DB_PASSWORD) or die("Database Connection Error");
    $database = mysql_select_db(DB_NAME) or die("No Database");
    // Create query
    $query = "INSERT INTO bah_register VALUES ('','$email','$password')";
    // Query database and 
    mysql_query($query);
    // Success message
    echo "Thanks for signing up!";
} else {
    foreach ($errors as $error) {
        echo $error . "<br />";
    }
}
}
?>