SimpleXMLElement::__construct
(PHP 5, PHP 7, PHP 8)
SimpleXMLElement::__construct — Creates a new SimpleXMLElement object
说明
$data
, int $options
= 0
, bool $dataIsURL
= false
, string $namespaceOrPrefix
= ""
, bool $isPrefix
= false
)Creates a new SimpleXMLElement object.
参数
-
data
-
A well-formed XML string or the path or URL to an XML document if
dataIsURL
istrue
. -
options
-
Optionally used to specify additional Libxml parameters, which affect reading of XML documents. Options which affect the output of XML documents (e.g.
LIBXML_NOEMPTYTAG
) are silently ignored.注意:
It may be necessary to pass
LIBXML_PARSEHUGE
to be able to process deeply nested XML or very large text nodes. -
dataIsURL
-
By default,
dataIsURL
isfalse
. Usetrue
to specify thatdata
is a path or URL to an XML document instead of string data. -
namespaceOrPrefix
-
Namespace prefix or URI.
-
isPrefix
-
true
ifnamespaceOrPrefix
is a prefix,false
if it's a URI; defaults tofalse
.
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
注意:
Listed examples may include
example.php
, which refers to the XML string found in the first example of the basic usage guide.
示例 #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
示例 #2 Create a SimpleXMLElement object from a URL
<?php
$sxe = new SimpleXMLElement('http://example.org/document.xml', NULL, TRUE);
echo $sxe->asXML();
?>
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