文字
DOMCharacterData::substringData
(PHP 5, PHP 7)
DOMCharacterData::substringData — Extracts a range of data from the node
说明
string DOMCharacterData::substringData
( int
$offset
, int $count
)Returns the specified substring.
参数
-
offset -
Start offset of substring to extract.
-
count -
The number of characters to extract.
返回值
The specified substring. If the sum of offset
and count exceeds the length, then all 16-bit units
to the end of the data are returned.
错误／异常
-
DOM_INDEX_SIZE_ERR -
Raised if
offsetis negative or greater than the number of 16-bit units in data, or ifcountis negative.
参见
- DOMCharacterData::appendData() - Append the string to the end of the character data of the node
- DOMCharacterData::deleteData() - Remove a range of characters from the node
- DOMCharacterData::insertData() - Insert a string at the specified 16-bit unit offset
- DOMCharacterData::replaceData() - Replace a substring within the DOMCharacterData node