Echoing an image link breaks my code

I am using usercake to generate links to different permissions.

All works fine if I want hyperlinks, I added in an image bit and it broke the code, it will load but the entire address bar goes like there are no permissions.

Before:

//Links for permission level 3 (xx)
    if ($loggedInUser->checkPermission(array(3))){
    echo "<div id='xx'>
    <ul>
    <li><a href='xx.php'>xxx</a></li>
    </ul></br ></div>";
    }

After

//Links for permission level 3 (xx)
    if ($loggedInUser->checkPermission(array(3))){
    echo "<div id='xx'>
    <ul>
    <li><a href="xxx.php"><img src="xx"></a></li>
    </ul></br ></div>";
    }

It just makes the menu bar disappear.

Any ideas? Am I missing something obvious?

--update is it because I have not escaped properly?

Solution

" characters will terminate the string literal, and if you don't follow them with a concatenation operator (either . or ,), your code will throw a syntax error.

You need to escape them using \:

if ($loggedInUser->checkPermission(array(3))){
    echo "<div id='xx'>
    <ul>
    <li><a href=\"xxx.php\"><img src=\"xx\"></a></li>
    </ul></br ></div>";
}

Failing that, since you're not outputting any variable inside your string, you can use ' (single quotes) to begin and terminate the literal, which means you won't have to escape double quotes inside of it. For example:

if ($loggedInUser->checkPermission(array(3))){
    echo '<div id="xx">
    <ul>
    <li><a href="xxx.php"><img src="xx"></a></li>
    </ul></br ></div>';
}