(PHP 5, PHP 7, PHP 8)
spl_classes — 返回所有可用的SPL类
此函数没有参数。
Returns an array containing the currently available SPL classes.
示例 #1 spl_classes() example
<?php
print_r(spl_classes());
?>以上示例的输出类似于：
Array
(
[ArrayObject] => ArrayObject
[ArrayIterator] => ArrayIterator
[CachingIterator] => CachingIterator
[RecursiveCachingIterator] => RecursiveCachingIterator
[DirectoryIterator] => DirectoryIterator
[FilterIterator] => FilterIterator
[LimitIterator] => LimitIterator
[ParentIterator] => ParentIterator
[RecursiveDirectoryIterator] => RecursiveDirectoryIterator
[RecursiveIterator] => RecursiveIterator
[RecursiveIteratorIterator] => RecursiveIteratorIterator
[SeekableIterator] => SeekableIterator
[SimpleXMLIterator] => SimpleXMLIterator
)