Các hàm libxml trong PHP
Giới thiệu PHP libxml
Các hàm và hằng libxml được sử dụng cùng với các hàm SimpleXML, XSLT và DOM.
Cài đặt
Các chức năng này yêu cầu gói libxml. Tải xuống tại xmlsoft.org
Các hàm libxml trong PHP
PHP : cho biết phiên bản PHP sớm nhất hỗ trợ chức năng này.
| Function | Description |
|---|---|
| libxml_clear_errors() | Clears the libxml error buffer |
| libxml_disable_entity_loader() | Enables the ability to load external entities |
| libxml_get_errors() | Gets the errors from the the libxml error buffer |
| libxml_get_last_error() | Gets the last error from the the libxml error buffer |
| libxml_set_external_entity_loader() | Changes the default external entity loader |
| libxml_set_streams_context() | Sets the streams context for the next libxml document load or write |
| libxml_use_internal_errors() | Disables the standard libxml errors and enables user error handling |
Các hằng số libxml được xác định trước trong PHP
| Constant | Description |
|---|---|
| LIBXML_BIGLINES | Make line numbers greater than 65535 to be reported correctly |
| LIBXML_COMPACT | Set small nodes allocation optimization. This may improve the application performance |
| LIBXML_DTDATTR | Set default DTD attributes |
| LIBXML_DTDLOAD | Load external subset |
| LIBXML_DTDVALID | Validate with the DTD |
| LIBXML_HTML_NOIMPLIED | Set HTML_PARSE_NOIMPLIED flag. This turns off automatic adding of implied html/body elements |
| LIBXML_HTML_NODEFDTD | Set HTML_PARSE_NODEFDTD flag. This prevents a default doctype to be added, if no doctype is found |
| LIBXML_NOBLANKS | Remove blank nodes |
| LIBXML_NOCDATA | Set CDATA as text nodes |
| LIBXML_NOEMPTYTAG | Change empty tags (e.g. <br/> to <br></br>), only available in the DOMDocument->save() and DOMDocument->saveXML() functions |
| LIBXML_NOENT | Substitute entities |
| LIBXML_NOERROR | Do not show error reports |
| LIBXML_NONET | Stop network access while loading documents |
| LIBXML_NOWARNING | Do not show warning reports |
| LIBXML_NOXMLDECL | Drop the XML declaration when saving a document |
| LIBXML_NSCLEAN | Remove excess namespace declarations |
| LIBXML_PARSEHUGE | Set XML_PARSE_HUGE flag. This relaxes any hardcoded limit from the parser, such as maximum depth of a document or the size of text nodes |
| LIBXML_PEDANTIC | Set XML_PARSE_PEDANTIC flag. This enables pedantic error reporting |
| LIBXML_XINCLUDE | Use XInclude substitution |
| LIBXML_ERR_ERROR | Get recoverable errors |
| LIBXML_ERR_FATAL | Get fatal errors |
| LIBXML_ERR_NONE | Get no errors |
| LIBXML_ERR_WARNING | Get simple warnings |
| LIBXML_VERSION | Get libxml version (e.g. 20605 or 20617) |
| LIBXML_DOTTED_VERSION | Get dotted libxml version (e.g. 2.6.5 or 2.6.17) |
| LIBXML_SCHEMA_CREATE | Create default or fixed value nodes during XSD schema validation |