DOMText::splitText()
(PHP 5, PHP 7)
Breaks this node into two nodes at the specified offset
说明
public DOMText::splitText(int $offset): DOMText
Breaks this node into two nodes at the specified$offset, keeping both in the tree as siblings.
After being split, this node will contain all the content up to the$offset. If the original node had a parent node, the new node is inserted as the next sibling of the original node. When the$offsetis equal to the length of this node, the new node has no data.
参数
- $offset
The offset at which to split, starting from 0.
返回值
The new node of the same type, which contains all the content at and after the$offset.
It should be noted that $offset is a **character offset**, not a **byte offset**. This means that most other PHP string functions that deal with lengths and offsets (strlen, strpos, preg_match with PREG_OFFSET_CAPTURE, etc.) use and return values unsuitable for this method if used with multibyte strings (like UTF-8 strings). Byte offsets can be converted to character offsets with mb_strlen: <?php function char_offset($string, $byte_offset, $encoding = null) { $substr = substr($string, 0, $byte_offset); return mb_strlen($substr, $encoding ?: mb_internal_encoding()); } ?>