(unknown)
DomNode->node_value -- 
     ノードの値を返す
    
説明
string 
DomNode->node_value ( void)
     Returns value of the node. The value has different meanings
     for the different types of nodes as illustrated in the following table.
     
表 1Meaning of value
| Type | Meaning | 
|---|
| DomAttribute | value of attribute | 
| DomAttribute |  | 
| DomCDataSection | content | 
| DomComment | content of comment | 
| DomDocument | null | 
| DomDocumentType | null | 
| DomElement | null | 
| DomEntity | null | 
| DomEntityReference | null | 
| DomNotation | null | 
| DomProcessingInstruction | entire content without target | 
| DomText | content of text |