[点语法](%E7%82%B9%E8%AF%AD%E6%B3%95.md) [依赖注入](%E4%BE%9D%E8%B5%96%E6%B3%A8%E5%85%A5.md) [反射](%E5%8F%8D%E5%B0%84.md) [迭代器和yield](%E8%BF%AD%E4%BB%A3%E5%99%A8%E5%92%8Cyield.md) [array_walk](array_walk.md) [str_replace](str_replace.md) [openssl_decrypt](openssl_decrypt.md) [array_merge](array_merge.md) [闭包](%E9%97%AD%E5%8C%85.md) [深拷贝与浅拷贝](%E6%B7%B1%E6%8B%B7%E8%B4%9D%E4%B8%8E%E6%B5%85%E6%8B%B7%E8%B4%9D.md)