simplexml_load_file

(PHP 5, PHP 7, PHP 8)

simplexml_load_file — Interprets an XML file into an object

说明

simplexml_load_file(
    string $filename,
    ?string $class_name = SimpleXMLElement::class,
    int $options = 0,
    string $namespace_or_prefix = "",
    bool $is_prefix = false
): SimpleXMLElement|false

Convert the well-formed XML document in the given file to an object.

参数

filename

Path to the XML file

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

Bitwise OR of the libxml option constants.

namespace_or_prefix

Namespace prefix or URI.

is_prefix

true if namespace_or_prefix 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.

警告

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.

小技巧

Use libxml_use_internal_errors() to suppress all XML errors, and libxml_get_errors() to iterate over them afterwards.

示例

示例 #1 Interpret an XML document

<?php
// The file examples/book.xml contains an XML document with a root element
// and at least an element /[root]/title.

if (file_exists('examples/book.xml')) {
$xml = simplexml_load_file('examples/book.xml');

print_r($xml);
} else {
exit('Failed to open examples/book.xml.');
}
?>

This script will display, on success: 

SimpleXMLElement Object
(
  [book] => Array
  ...
)

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

参见