XML parser error: entity not defined

Question

I have searched stackoverflow on this problem and did find a few topics, but I feel like there isn\'t really a solid answer for me on this.

I have a form that users

Answer 1

Use "htmlentities()" with flag "ENT_XML1": htmlentities($value, ENT_XML1);

If you use "SimpleXMLElement" class:

$SimpleXMLElement->addChild($name, htmlentities($value, ENT_XML1));