simplexml_load_file

(PHP 5, PHP 7)

simplexml_load_file — Interprets an XML file into an object

说明

simplexml_load_file ( string $filename [, string $class_name = "SimpleXMLElement" [, int $options = 0 [, string $ns = "" [, bool $is_prefix = FALSE ]]]] ) : SimpleXMLElement

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.

Warning

此函数可能返回布尔值 FALSE，但也可能返回等同于 FALSE 的非布尔值。请阅读 布尔类型章节以获取更多信息。应使用 === 运算符来测试此函数的返回值。

错误／异常

Produces an E_WARNING error message for each error found in the XML data.

Tip

Use 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

<?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.');
}
?>

This script will display, on success: 

SimpleXMLElement Object
(
  [title] => Example Title
  ...
)

At this point, you can go about using $xml->title and any other elements.

参见

相关文章
php domdocument dumps the internal xml tree back into a filephp apc 函数 load a binary dump into the apc file/user cachephp cubrid 函数 export the lob object to a filephp eio 函数 perform file readahead into page cachephp zlib 函数 read entire gz file into an arrayphp informix 函数 writes a string into the slob objectphp ingres 函数 fetch a row of result into an objectphp openal 函数 load a .wav file into a bufferphp rrd 函数 restores the rrd file from xml dumpphp simplexml 函数 get a simplexmlelement object from a dom nodephp simplexml 函数 interprets an xml file into an objectphp simplexml 函数 interprets a string of xml into an objectphp snmp 函数 reads and parses a mib file into the active mib treephp com 函数 convert a variant into a new variant object of another typephp sdo das xml 函数 to load a second or subsequent schema file to a sdo das xml objectphp sdo das xml 函数 to create sdo das xml object for a given schema filephp sdo das xml 函数 creates an xml document object from scratch without the need to load a document from a file or stringphp sdo das xml 函数 returns sdo das xml document object for a given path to xml instance documentphp sdo das xml 函数 saves the sdo das xml document object to a filephp sdo das xml 函数 saves the sdo das xml document object to a string
关注编程学问公众号