Php/docs/domcharacterdata.substringdata

• PHP Manual
• DOMCharacterData
• Extracts a range of data from the node

DOMCharacterData::substringData

(PHP 5, PHP 7)

DOMCharacterData::substringData — Extracts a range of data from the node

说明

public DOMCharacterData::substringData ( int $offset , int $count ) : string

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 offset is negative or greater than the number of 16-bit units in data, or if count is 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