PHP 8.4.0 Alpha 2 available for testing

SimpleXMLElement::valid

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SimpleXMLElement::validCheck whether the current element is valid

说明

public SimpleXMLElement::valid(): bool
警告

Prior to PHP 8.0, SimpleXMLElement::valid() was only declared on the subclass SimpleXMLIterator.

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

参数

此函数没有参数。

返回值

Returns true if the current element is valid, otherwise false

示例

示例 #1 Check whether the current element is valid

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

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

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

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