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Why is this code breaking my page?


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Try this instead since you can't insert the normal IF statement in an echo:


if ($user_data['id'] == $opened['id'])
   $sel = 'selected';
  $sel = '';
echo "<option value='{$user_data["id"]}' $sel>{$user_data["fullname"]}</option>";


You could also use the ternary if operator but I never do.  Note use of " and {} to condense the statement.


(Hope I didn't make a typo here.  Couldn't paste my code into this post for some reason.)

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And you need to HTML-escape your variables. You can't just drop random strings into your markup and assume that they won't interfere with the rest of the page. In the worst case, this can be used to inject malicious code (also known as cross-site scripting).


function html_escape($raw_input, $encoding)
    return htmlspecialchars($raw_input, ENT_QUOTES | ENT_SUBSTITUTE, $encoding);

const APP_HTML_ENCODING = 'UTF-8';   // insert your encoding here
echo '<option value="'.html_escape($user_data['id'], APP_HTML_ENCODING).'" '.($user_data['id'] == $opened['id'] ? 'selected' : '').'>'.html_escape($user_data['fullname'], APP_HTML_ENCODING).'</option>';

Of course the best solution is to avoid this kind of PHPHTML spaghetti code altogether.

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