未知的PHP错误

Question

When using this PHP code, I get the following error: Notice: Undefined index: error in C:\Apache24\htdocs\index.php on line 42

<?php
    if ($error == 'true' && isset($error)) {       //This is line 42
        echo "<div><p>There was an error</p>
              <p><img src=\"errorclose.png\"></p></div>";
    };
?>

Funny enough, when $error is equal to true, however, the code works perfectly.

Why is the error occurring? Is there a syntax error?

Answer 1

Escape the quotes and I think you should do fine.

<?php
    if ($error == 'true') {
    echo "<div><p>There was an error</p>
    <p><img src=\"errorclose.png\"></p></div>";
    };
?>