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SimpleXMLElement::getDocNamespaces> <SimpleXMLElement::children
Last updated: Fri, 13 Nov 2009

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SimpleXMLElement::__construct

(PHP 5 >= 5.0.1)

SimpleXMLElement::__construct 新しい SimpleXMLElement オブジェクトを作成する

説明

__construct ( string $data [, int $options [, bool $data_is_url [, string $ns [, bool $is_prefix ]]]] )

新しい SimpleXMLElement オブジェクトを作成します。

パラメータ

data

整形式 XML 文字列。 もし data_is_urlTRUE の場合には、XML ドキュメントへのパスあるいは URL。

options

オプションで、追加の Libxml パラメータを指定するために使用します。

data_is_url

デフォルトでは data_is_urlFALSE です。 data が、文字列データではなく XML ドキュメントへのパスあるいは URL である場合に TRUE を使用します。

ns

is_prefix

返り値

data を表す SimpleXMLElement オブジェクトを返します。

エラー / 例外

XML データ内でエラーが見つかるたびに E_WARNING エラーメッセージが発生します。そしてエラーが見つかった場合は例外をスローします。

ヒント

libxml_use_internal_errors() ですべての XML エラーを抑制し、 後から libxml_get_errors() で取得することもできます。

例1 SimpleXMLElement オブジェクトの作成

<?php

include 'example.php';

$sxe = new SimpleXMLElement($xmlstr);
echo 
$sxe->movie[0]->title;

?>

例2 URL からの SimpleXMLElement オブジェクトの作成

<?php

$sxe 
= new SimpleXMLElement('http://example.org/document.xml'NULLTRUE);
echo 
$sxe->asXML();

?>

参考



add a note add a note User Contributed Notes
SimpleXMLElement::__construct
zwilson at gulosolutions dot com
20-Nov-2009 03:16
SimpleXML does not correctly parse SOAP XML results if the result comes back with colons ‘:’ in a tag, like <soap:Envelope>. Why? Because SimpleXML treats the colon character ‘:’ as an XML namespace, and places the entire contents of the SOAP XML result inside a namespace within the SimpleXML object. There is no real way to correct this using SimpleXML, but we can alter the raw XML result a little before we send it to SimpleXML to parse.

All we have to do is use the preg_replace function to get rid of the colons in the SOAP response tags BEFORE you hand it off to SimpleXML, like so:

<?php
// SimpleXML seems to have problems with the colon ":" in the <xxx:yyy> response tags, so take them out
$xmlString = preg_replace("/(<\/?)(\w+):([^>]*>)/", "$1$2$3", $response);
?>
uramihsayibok, gmail, com
17-Aug-2009 10:52
As I was filling out a bug report, I realized why (speculation here) the constructor is final: so that functions like simplexml_load_file and simplexml_load_string can work. I imagine the PHP-ized code looks something like

<?php

function simplexml_load_file($filename, $class_name = "SimpleXMLElement", $options = 0, $ns = "", $is_prefix = false) {
    return new
$class_name($filename, $options, true, $ns, $is_prefix);
}

?>

If we were to use a different $class_name and change the constructor's definition these functions wouldn't work.

There's no easy, sensible solution that keeps simplexml_load_file and simplexml_load_string.
alvaro at demogracia dot com
30-Sep-2008 05:42
A note about the undocumented parameters:

$ns (string): namespace prefix or URI
$is_prefix (bool): TRUE if $ns is a prefix, FALSE if it's a URI; defaults to FALSE

E.g.:

<?php
$xml_string
= '<xml xmlns:foo='uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882'>
<foo:bar>..................'
;

$a = new SimpleXMLElement($xml_string, NULL, FALSE, 'foo', TRUE);
$b = new SimpleXMLElement($xml_string, NULL, FALSE, 'uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882', FALSE);
?>

However, I don't know exactly what these parameters are used for. They don't seem to be of much help when dealing with namespaces :-?
tudor at culise dot net
20-Nov-2007 08:35
This class is extendable, but it's too bad that its constructor cannot be overriden (PHP says it's a final method). Thus the class should be wrapped using the delegation principle rather that extended.

 
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