(PHP 5, PHP 7)
DOMDocument::createAttribute — Create new attribute
public DOMDocument::createAttribute ( string $name ) : DOMAttr
This function creates a new instance of class DOMAttr. This node will not show up in the document unless it is inserted with (e.g.) DOMNode::appendChild().
name
The name of the attribute.
The new DOMAttr or false if an error occurred.
DOM_INVALID_CHARACTER_ERR
Raised if name contains an invalid character.
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https://www.php.net/manual/en/domdocument.createattribute.php