SimpleXMLElement::asXML

(PHP 5, PHP 7, PHP 8)

SimpleXMLElement::asXML — Return a well-formed XML string based on SimpleXML element

说明

public SimpleXMLElement::asXML(?string $filename = null): string|bool

The asXML method formats the parent object's data in XML version 1.0.

参数

filename

If a string value is provided, the function writes the data to the file rather than returning it.

返回值

If the filename isn't specified, this function returns a string on success and false on error. If the parameter is specified, it returns true if the file was written successfully and false otherwise.

更新日志

版本 说明
8.0.0 filename is nullable now.

范例

示例 #1 Get XML

<?php
$string = <<<XML
<a>
 <b>
  <c>text</c>
  <c>stuff</c>
 </b>
 <d>
  <c>code</c>
 </d>
</a>
XML;

$xml = new SimpleXMLElement($string);

echo $xml->asXML();

?>

以上例程会输出：

<?xml version="1.0"?>
<a>
 <b>
  <c>text</c>
  <c>stuff</c>
 </b>
 <d>
  <c>code</c>
 </d>
</a>

asXML also works on Xpath results:

示例 #2 Using asXML() on SimpleXMLElement::xpath() results

<?php
// Continued from example XML above.

/* Search for <a><b><c> */
$result = $xml->xpath('/a/b/c');

foreach ($result as $node) {
    echo $node->asXML();
}
?>

以上例程会输出：

<c>text</c><c>stuff</c>

参见