In such cases, look into whether PHP itself supports the feature and use that function or extension instead.

在这种情况下，请查看PHP是否支持此功能并且使用函数或扩展替代它。

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Use of PHP's safe mode is one technique for meeting this goal, but it can also unduly limit users, and some PHP applications simply don't function with this facility enabled.

使用PHP的安全模式是实现这一目标的一种技术，但是它也过度地限制了用户，而且启用了这个设施之后，一些PHP应用程序就不能发挥作用。

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This article assumes that you have some experience using PHP already and can use a function to pass a variable and return a result.

本文假设您已经具有一些使用PHP的经验，并能够使用函数来传递变量并返回结果。

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