PHP Manual
DOMNode
Adds a new child before a reference node

DOMNode::insertBefore

(PHP 5, PHP 7)

DOMNode::insertBefore — Adds a new child before a reference node

说明

public DOMNode::insertBefore ( DOMNode $newnode [, DOMNode $refnode ] ) : DOMNode

This function inserts a new node right before the reference node. If you plan to do further modifications on the appended child you must use the returned node.

参数

newnode: The new node.
refnode: The reference node. If not supplied, newnode is appended to the children.

返回值

The inserted node.

错误／异常

DOM_NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or if the previous parent of the node being inserted is readonly.
DOM_HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newnode node, or if the node to append is one of this node's ancestors or this node itself.
DOM_WRONG_DOCUMENT_ERR: Raised if newnode was created from a different document than the one that created this node.
DOM_NOT_FOUND: Raised if refnode is not a child of this node.

参见

DOMNode::appendChild() - Adds new child at the end of the children

php domdocument create new entity reference node php domelement adds new attribute php domelement adds new attribute node to element php domelement adds new attribute node to element php domelement adds new attribute php domnode adds new child at the end of the children php domnode clones a node php domnode adds a new child before a reference node php domnode removes child from list of children php domnode replaces a child php harudoc insert new page just before the specified page php imagick adds new image to imagick object image list php quickhashinthash this method updates an entry in the hash with a new value or adds a new one if the entry doesn t exist php quickhashintset this method adds a new entry to the set php quickhashintstringhash this method updates an entry in the hash with a new value or adds a new one if the entry doesn t exist php quickhashstringinthash this method updates an entry in the hash with a new value or adds a new one if the entry doesn t exist php simplexmlelement adds a child element to the xml node php solrinputdocument adds a child document for block indexing php solrinputdocument adds an array of child documents php weakref constructs a new weak reference