SimpleXMLIterator::hasChildren

(PHP 5 >= 5.1.0)

SimpleXMLIterator::hasChildren — Checks whether the current element has sub elements.

说明

public bool SimpleXMLIterator::hasChildren ( void )

This method checks whether the current SimpleXMLIterator element has sub-elements.

参数

此函数没有参数。

返回值

TRUE if the current element has sub-elements, otherwise FALSE

范例

Example #1 Check whether the current element has sub-elements

  <?php
$xml  = <<<XML
 <books>
    <book>
        <title>PHP Basics</title>
        <author>Jim Smith</author>
    </book>
    <book>XML basics</book>
</books>
 XML;

 $xmlIterator  = new  SimpleXMLIterator (  $xml  );
for(  $xmlIterator -> rewind ();  $xmlIterator -> valid ();  $xmlIterator -> next () ) {
    if( $xmlIterator -> hasChildren ()) {
         var_dump ( $xmlIterator -> current ());
    }
}
 ?>

以上例程会输出：

object(SimpleXMLIterator)#2 (2) {
  ["title"]=>
  string(10) "PHP Basics"
  ["author"]=>
  string(9) "Jim Smith"
}

用户评论:

[#1] grummfy at gmail dot com [2010-02-12 01:01:57]

Hello,

just a note for people like me who encounter the problems :

<?php foreach($xmlIterator as $x) { if($x->hasChildren()) { //never reach echo 'x : '; var_dump($x->current()); } if($xmlIterator->hasChildren()) { echo 'iterator : '; var_dump($x->current()); //all time null var_dump($xmlIterator->current()); } } ?>

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