simplexml_load_file
(PHP 5)
simplexml_load_file — Interprets an XML file into an object
说明
SimpleXMLElement simplexml_load_file ( string $filename [, string $class_name = "SimpleXMLElement" [, int $options = 0 [, string $ns = "" [, bool $is_prefix = false ]]]] )Convert the well-formed XML document in the given file to an object.
参数
- filename
-
Path to the XML file
Note:
Libxml 2 unescapes the URI, so if you want to pass e.g. b&c as the URI parameter a, you have to call simplexml_load_file(rawurlencode('http://example.com/?a=' . urlencode('b&c'))). Since PHP 5.1.0 you don't need to do this because PHP will do it for you.
- class_name
-
You may use this optional parameter so that simplexml_load_file() will return an object of the specified class. That class should extend the SimpleXMLElement class.
- options
-
Since PHP 5.1.0 and Libxml 2.6.0, you may also use the options parameter to specify additional Libxml parameters.
- ns
-
Namespace prefix or URI.
- is_prefix
-
TRUE if ns is a prefix, FALSE if it's a URI; defaults to FALSE.
返回值
Returns an object of class SimpleXMLElement with properties containing the data held within the XML document, 或者在失败时返回 FALSE.
错误/异常
Produces an E_WARNING error message for each error found in the XML data.
TipUse libxml_use_internal_errors() to suppress all XML errors, and libxml_get_errors() to iterate over them afterwards.
范例
Example #1 Interpret an XML document
This script will display, on success:
At this point, you can go about using $xml->title
and any other elements.
<?php
// The file test.xml contains an XML document with a root element
// and at least an element /[root]/title.
if (file_exists('test.xml')) {
$xml = simplexml_load_file('test.xml');
print_r($xml);
} else {
exit('Failed to open test.xml.');
}
?>
SimpleXMLElement Object
(
[title] => Example Title
...
)
参见
- simplexml_load_string() - Interprets a string of XML into an object
- SimpleXMLElement::__construct() - Creates a new SimpleXMLElement object
- Dealing with XML errors
- libxml_use_internal_errors() - Disable libxml errors and allow user to fetch error information as needed
- Basic SimpleXML usage
