function designation
PHP 使用三元操作符（foo? bar:baz）和冗长的函数名列表，而命名约定更是无所不有；相反，您会发现 Python 要简洁多了。
PHP has the ternary operator (foo?bar:baz) and an enormous (and unwieldy) list of function names, with all kinds of naming conventions; you'll find Python a lot cleaner.
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