处理PHP中的大型IF语句 [英] Dealing with big IF statements in PHP

问题描述

PHP中的简单 if 语句有什么好的选择吗？我知道切换，但我猜这里还有一些更精致的替代方案，当使用非常大的时会很方便陈述。

Is there any good alternative for the plain if statements in PHP? I know about switch, but I'll guess that there's some more refined alternative out there that comes handy when working with really big if statements.

非常感谢，

推荐答案

如果你想只提高可读性，那么你总是可以在if语句中拆分表达式：

If you want to improve readability only, then you can always split up the expressions inside the if statement:

$exp1 = is_array($var) && isset($var['key']);
$exp2 = is_object($var) && isset($var->key);
$exp3 = substr($string, 0, 4) == 'foo';
$exp4 = ($exp1 || $exp2) && $exp3;
if ($exp4) {}

而不是

if (((is_array($var) && isset($var['key'])) || (is_object($var) && isset($var->key))) && substr($string, 0, 4) == 'foo') {}

显然，这些是简化的例子，但你明白了......

Obviously, these are simplified examples, but you get the idea...

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