SimpleXMLElement::xpath
Here's a simple function to convert an XML string to an array -
<?php
// PHP5.3 and above only
function parse($str) {
$f = function($iter) {
foreach($iter as $key=>$val)
$arr[$key][] = ($iter->hasChildren())?
call_user_func (__FUNCTION__, $val)
: strval($val);
return $arr;
};
return $f(new SimpleXmlIterator($str, null));
}
?>
PHP 5.2 and below do not have anonymous functions.
But you can create a helper function to achieve the same thing -
<?php
function parse($str) {
return parseHelper(new SimpleXmlIterator($str, null));
}
function parseHelper($iter) {
foreach($iter as $key=>$val)
$arr[$key][] = ($iter->hasChildren())?
call_user_func (__FUNCTION__, $val)
: strval($val);
return $arr;
}
?>
Using it is straightforward enough -
<?php
$xml = '
<movies>
<movie>abcd</movie>
<movie>efgh</movie>
<movie>hijk</movie>
</movies>';
var_dump(parse($xml));
?>
This will output -
array
'movie' =>
array
0 => string 'abcd' (length=4)
1 => string 'efgh' (length=4)
2 => string 'hijk' (length=4)
SimpleXMLIterator クラス
(PHP 5 >= 5.1.0)
導入
SimpleXMLIterator は、SimpleXMLElement オブジェクトのすべてのノードに対する再帰的な反復処理を提供します。
クラス概要
SimpleXMLIterator
extends
SimpleXMLElement
implements
RecursiveIterator
,
Traversable
,
Iterator
,
Countable
{
/* メソッド */
/* 継承したメソッド */
final public SimpleXMLElement::__construct
( string
$data
[, int $options = 0
[, bool $data_is_url = false
[, string $ns = ""
[, bool $is_prefix = false
]]]] )
public void SimpleXMLElement::addAttribute
( string
$name
[, string $value
[, string $namespace
]] )
public SimpleXMLElement SimpleXMLElement::addChild
( string
$name
[, string $value
[, string $namespace
]] )
public SimpleXMLElement SimpleXMLElement::attributes
([ string
}$ns = NULL
[, bool $is_prefix = false
]] )目次
- SimpleXMLIterator::current — 現在の SimpleXML エントリを返す
- SimpleXMLIterator::getChildren — 現在の要素の子要素を返す
- SimpleXMLIterator::hasChildren — 現在の要素が子要素を持つかどうかを調べる
- SimpleXMLIterator::key — 現在のキーを返す
- SimpleXMLIterator::next — 次の要素に移動する
- SimpleXMLIterator::rewind — 最初の要素に巻き戻す
- SimpleXMLIterator::valid — 現在の要素が有効かどうかを調べる
add a note
User Contributed Notes
SimpleXMLIterator
ajnsit dot NOSPAM at gmail dot com
17-Mar-2011 10:14
ratfactor at gmail dot com
19-Jul-2009 05:08
The documentation is a bit sparse for SimpleXmlIterator. Here is an example showing the use of its methods. xml2Array and sxiToArray work together to convert an XML document to an associative array structure.
The contents of cats.xml:
======================================
<cats>
<cat>
<name>Jack</name>
<age>2</age>
<color>grey</color>
<color>white</color>
</cat>
<cat>
<name>Maxwell</name>
<age>12</age>
<color>orange</color>
<color>black</color>
</cat>
</cats>
======================================
<?php
function xml2array($fname){
$sxi = new SimpleXmlIterator($fname, null, true);
return sxiToArray($sxi);
}
function sxiToArray($sxi){
$a = array();
for( $sxi->rewind(); $sxi->valid(); $sxi->next() ) {
if(!array_key_exists($sxi->key(), $a)){
$a[$sxi->key()] = array();
}
if($sxi->hasChildren()){
$a[$sxi->key()][] = sxiToArray($sxi->current());
}
else{
$a[$sxi->key()][] = strval($sxi->current());
}
}
return $a;
}
// Read cats.xml and print the results:
$catArray = xml2array('cats.xml');
print_r($catArray);
?>
Results (reformatted a bit for compactness and clarity):
======================================
Array(
[cat] => Array(
[0] => Array(
[name] => Array( [0] => Jack )
[age] => Array( [0] => 2 )
[color] => Array( [0] => grey,
[1] => white )
)
[1] => Array(
[name] => Array( [0] => Maxwell )
[age] => Array( [0] => 12 )
[color] => Array( [0] => orange
[1] => black )
)
)
)
David Lanstein
17-Jan-2009 06:40
Unlike the DirectoryIterator, for one, you'll need to call $it->rewind() before using the iterator in a for() or while() loop. Calling foreach() does rewind the iterator before iteration.