(PHP 5, PHP 7)
DOMDocument::createProcessingInstruction — Creates new PI node
$target
[, string $data
] ) : DOMProcessingInstructionThis function creates a new instance of class DOMProcessingInstruction. �˽ڵ�������ĵ��У������������� DOMNode->appendChild() �Ⱥ�����������롣
target
The target of the processing instruction.
data
The content of the processing instruction.
The new DOMProcessingInstruction or FALSE
if an error occurred.
DOM_INVALID_CHARACTER_ERR
Raised if target
contains an invalid character.