SimpleXMLElement::__construct
(PHP 5, PHP 7)
SimpleXMLElement::__construct — Creates a new SimpleXMLElement object
说明
$data
[, int $options = 0
[, bool $data_is_url = FALSE
[, string $ns = ""
[, bool $is_prefix = FALSE
]]]] )Creates a new SimpleXMLElement object.
参数
-
data -
A well-formed XML string or the path or URL to an XML document if
data_is_urlisTRUE. -
options -
Optionally used to specify additional Libxml parameters.
Note:
It may be necessary to pass
LIBXML_PARSEHUGEto be able to process deeply nested XML or very large text nodes.
data_is_url
By default, data_is_url is FALSE. Use TRUE to
specify that data is a path or URL to an XML
document instead of string data.
nsNamespace prefix or URI.
is_prefix
TRUE if ns is a prefix, FALSE if it's a URI;
defaults to FALSE.
返回值
Returns a SimpleXMLElement object representing
data.
错误／异常
Produces an E_WARNING error message for each error
found in the XML data and additionally throws an Exception if the XML data
could not be parsed.
Use libxml_use_internal_errors() to suppress all XML errors, and libxml_get_errors() to iterate over them afterwards.
范例
Note:
Listed examples may include example.php, which refers to the XML string found in the first example of the basic usage guide.
Example #1 Create a SimpleXMLElement object
<?php
include 'example.php';
$sxe = new SimpleXMLElement($xmlstr);
echo $sxe->movie[0]->title;
?>
以上例程会输出：
PHP: Behind the Parser
Example #2 Create a SimpleXMLElement object from a URL
<?php
$sxe = new SimpleXMLElement('http://example.org/document.xml', NULL, TRUE);
echo $sxe->asXML();
?>
更新日志
| 版本 | 说明 |
|---|---|
| 5.2.0 | Added the ns and is_prefix parameters. |
| 5.1.2 | Added the options and data_is_url parameters. |
参见
- Basic SimpleXML usage
- simplexml_load_string() - Interprets a string of XML into an object
- simplexml_load_file() - Interprets an XML file into an object
- Dealing with XML errors
- libxml_use_internal_errors() - Disable libxml errors and allow user to fetch error information as needed