(PECL uopz 1, PECL uopz 2, PECL uopz 5, PECL uopz 6, PECL uopz 7 < 7.1.0)
uopz_extend — Extend a class at runtime
$class, string $parent): bool
Makes class extend parent
classThe name of the class to extend
parentThe name of the class to inherit
成功时返回 true， 或者在失败时返回 false。
As of PHP 7.4.0, uopz_extends() throws a RuntimeException,
if OPcache is enabled,
and the class entry of either class
or parent (if it is a trait) is immutable.
示例 #1 uopz_extend() example
<?php
class A {}
class B {}
uopz_extend(A::class, B::class);
var_dump(class_parents(A::class));
?>以上示例会输出：
array(1) {
["B"]=>
string(1) "B"
}