Nu-Coder Manual

PhpExpress Manual

PHP Joomla
Development

Dom\CharacterData::replaceWith	Dom\ChildNode

Dom\CharacterData	Last updated: Mon, 26 Oct 2026

Dom\CharacterData::substringData

(PHP 8 >= 8.4.0)

Dom\CharacterData::substringData — Extracts a range of data from the character data

Description

public function Dom\CharacterData::substringData(int $offset, int $count): string

Returns the specified substring.

Parameters

offset: Start offset of substring to extract.
count: The number of characters to extract.

Return Values

The specified substring. If the sum of offset and count exceeds the length, then all UTF-8 codepoints to the end of the data are returned.

Errors/Exceptions

May throw a DOMException with the following error codes:

DOM_INDEX_SIZE_ERR: Raised if offset is negative or greater than the number of UTF-8 codepoints in data, or if count is negative.

See Also

Dom\CharacterData::appendData() - Append the string to the end of the character data of the node
Dom\CharacterData::deleteData() - Remove a range of characters from the character data
Dom\CharacterData::insertData() - Insert a string at the specified UTF-8 codepoint offset
Dom\CharacterData::replaceData() - Replace a substring within the character data

Dom\CharacterData::replaceWith	Dom\ChildNode

Dom\CharacterData	Last updated: Mon, 26 Oct 2026