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(PHP 5 >= 5.0.0)
ArrayIterator::valid — Check whether array contains more entries
Checks if the array contains any more entries.
此函数没有参数。
没有返回值。
Example #1 ArrayIterator::valid() example
<?php
$array = array( '1' => 'one' );
$arrayobject = new ArrayObject ( $array );
$iterator = $arrayobject -> getIterator ();
var_dump ( $iterator -> valid ()); //bool(true)
$iterator -> next (); // advance to the next item
//bool(false) because there is only one array element
var_dump ( $iterator -> valid ());
?>