SimpleXMLIterator::hasChildren

(PHP 5, PHP 7, PHP 8)

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

说明

public SimpleXMLIterator::hasChildren ( ) : bool

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"
}

User Contributed Notes

grummfy at gmail dot com 12-Feb-2010 01:01
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());
    }
}
?>