How to reuse the if condition code in php

How to reuse php if condition code PHP code reuse

I have an if condition (composed of multiple expressions), which is used on many pages, but this condition changes at any time, for example:
If (condition)
{Statement}

How can I reuse code with this condition? Thank you very much!

Reply to discussion (solution)

Define

If (function (afaefae ))
Encapsulate your conditional calls into functions and call them according to different parameters.

$ Expr = 'conditional expression ';
If (eval ("return $ expr ;")){
...
}
However, you must ensure that all the variables involved in the operation exist.

If (function (afaefae ))
Encapsulate your conditional calls into functions and call them according to different parameters.

Extract the changed part as a parameter, and encapsulate the rest of the changes into the function content.