目录

PHP simplexml_load_file() 函数

❮ PHP SimpleXML 参考

示例

将XML文件转换为对象，然后输出对象的键和元素：

<?php
$xml=simplexml_load_file("note.xml");
print_r($xml);
?>

运行示例 »

定义和用法

simplexml_load_file() 函数将 XML 文档转换为对象。

语法

simplexml_load_file( file, class, options, ns, is_prefix)

参数值

Parameter	Description
file	Required. Specifies the path to the XML file
class	Optional. Specifies the class of the new object
options	Optional. Specifies additional Libxml parameters. Is set by specifying the option and 1 or 0 (TRUE or FALSE, e.g. LIBXML_NOBLANKS(1)) Possible values: LIBXML_COMPACT - Activate nodes allocation optimization (may speed up application) LIBXML_DTDATTR - Set default DTD attributes LIBXML_DTDLOAD - Load external subset LIBXML_DTDVALID - Validate with the DTD LIBXML_NOBLANKS - Remove blank nodes LIBXML_NOCDATA - Merge CDATA as text nodes LIBXML_NOEMPTYTAG - Expand empty tags (e.g. <br/> to <br></br>), only available in the DOMDocument->save() and DOMDocument->saveXML() functions LIBXML_NOENT - Substitute entities LIBXML_NOERROR - Do not show error reports LIBXML_NONET - Disable network access while loading documents LIBXML_NOWARNING - Do not show warning reports LIBXML_NOXMLDECL - Drop the XML declaration when saving a document LIBXML_NSCLEAN - Remove redundant namespace declarations LIBXML_PARSEHUGE - Sets XML_PARSE_HUGE flag, which relaxes any hardcoded limit from the parser. This affects limits like maximum depth of a document and limits of the size of text nodes LIBXML_XINCLUDE - Implement XInclude substitution LIBXML_ERR_ERROR - Get recoverable errors LIBXML_ERR_FATAL - Get fatal errors LIBXML_ERR_NONE - Get no errors LIBXML_ERR_WARNING - Get simple warnings LIBXML_VERSION - Get libxml version (e.g. 20605 or 20617) LIBXML_DOTTED_VERSION - Get dotted libxml version (e.g. 2.6.5 or 2.6.17)
ns	Optional. Specifies a namespace prefix or URI
is_prefix	Optional. Specifies a Boolean value. TRUE if ns is a prefix. FALSE if ns is a URI. Default is FALSE

技术细节

返回值：	成功时获得 SimpleXMLElement 对象。失败时为 FALSE
PHP 版本：	5+

更多示例

假设我们有以下 XML 文件，“注释.xml”：

<?xml version="1.0" encoding="UTF-8"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>

示例

输出 XML 文件中每个元素的数据：

<?php
$xml=simplexml_load_file("note.xml");
echo $xml->to . "<br>";
echo $xml->from . "<br>";
echo $xml->heading . "<br>";
echo $xml->body;
?>

运行示例 »

示例

输出 XML 文件中每个子节点的元素名称和数据：

<?php
$xml=simplexml_load_file("note.xml");
echo $xml->getName() . "<br>";

foreach($xml->children() as $child)
  {
  echo $child->getName() . ": " . $child . "<br>";
  }
?>

运行示例 »

❮ PHP SimpleXML 参考