xml_convert()

xml_convert($str[, $protect_all = FALSE])

Takes a string as input and converts the following reserved XML characters to entities:

• Ampersands: &
• Less than and greater than characters: < >
• Single and double quotes: ‘ “
• Dashes: -

This function ignores ampersands if they are part of existing numbered character entities, e.g. &#123;. Example:

$string = '<p>Here is a paragraph & an entity (&#123;).</p>';
$string = xml_convert($string);
echo $string;

outputs:

<p>Here is a paragraph & an entity ({).</p>