The xml_set_external_entity_ref_handler() function specifies the function that is called when the parser finds an external entity in the XML document.
If successful, the function returns TRUE. If it fails, returns FALSE.
xml_set_external_entity_ref_handler(parser,handler)
| parameter | describe |
|---|---|
| parser | Required. Specifies the XML parser to use. |
| handler | Required. Specifies the function to be called when the parser finds an external entity. |
The function specified by the "handler" parameter must have five parameters:
| parameter | describe |
|---|---|
| parser | Required. Specifies a variable containing the XML parser that calls the processor. |
| name | Required. Specifies a variable containing the name of the external entity. |
| base | Required. Specifies the basis for resolving system identifiers (system_id) of external entities. Currently this parameter is usually set to NULL. |
| system_id | Required. Specifies the system identifier of the external entity. |
| public_id | Required. Specifies the public identifier of the external entity. |
Note: The handler parameter can also be an array containing object references and method names.
<?php$parser=xml_parser_create();function char($parser,$data) { echo $data; }function ext_ent_handler($parser,$ent,$base,$sysID,$pubID) { echo "$ent<br />"; echo "$sysID<br />"; echo "$pubID<BR />"; }xml_set_character_data_handler($parser,"char");xml_set_external_entity_ref_handler($parser, "ext_ent_handler");$fp=fopen("test.xml","r");while ($data=fread($fp,4096)) { xml_parse($parser,$data,feof($fp)) or die (sprintf("XML Error: %s at line %d", xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser))); }xml_parser_free($parser);?>