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This document uses PHP Chinese website manual Release
(PHP 5 >= 5.1.0)
SplObjectStorage::valid — Returns if the current iterator entry is valid
Returns if the current iterator entry is valid.
此函数没有参数。
Returns TRUE
if the iterator entry is valid, FALSE
otherwise.
Example #1 SplObjectStorage::valid() example
<?php
$s = new SplObjectStorage ();
$o1 = new StdClass ;
$o2 = new StdClass ;
$s -> attach ( $o1 , "d1" );
$s -> attach ( $o2 , "d2" );
$s -> rewind ();
while( $s -> valid ()) {
echo $s -> key (). "\n" ;
$s -> next ();
}
?>
以上例程的输出类似于:
0 1