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PHP Manual
SimpleXMLIterator
Check whether the current element is valid

SimpleXMLIterator::valid

(PHP 5, PHP 7, PHP 8)

SimpleXMLIterator::valid — Check whether the current element is valid

說(shuō)明

public SimpleXMLIterator::valid(): bool

This method checks if the current element is valid after calls to SimpleXMLIterator::rewind() or SimpleXMLIterator::next().

參數

此函數沒(méi)有參數。

返回值

Returns true if the current element is valid, otherwise false

范例

示例 #1 Check whether the current element is valid


<?php
$xmlIterator = new SimpleXMLIterator('<books><book>SQL Basics</book></books>');

$xmlIterator->rewind(); // rewind to the first element
echo var_dump($xmlIterator->valid()); // bool(true)

$xmlIterator->next(); // advance to the next element
echo var_dump($xmlIterator->valid()); // bool(false) because there is only one element
?>

^{<dl id="mc2fb"></dl>}