PHP - 我可以把整个函数块放在PHP中if条件的表达式中返回boolean吗？ 例如：if（function（）{return true;}）

I created a conditional statement in PHP lately. I've been bothered if I can put the whole block of a function inside the parenthesis or the expression in IF condition. For example:

if( ! function($some_vars) {
     //Execute logic of the function here
     return false;
}) {
     // Execute if the function above returns false;
}

PS: The code above does not return any error but does not execute the logic inside the function either. My question is: Are the code above possible and if this is possible, is it safe/recommended?

Thanks!

You can use call_user_func to execute such function right now:

if(!call_user_func(function($some_vars) {
     //Execute logic of the function here
     var_dump($some_vars);
     return false;
},"a variable called some_vars")) {
     var_dump("yes");
}

But as it's not recommended because of readability. So the following code is more readable:

function checkSomeVar($some_vars) {
     //Execute logic of the function here
     var_dump($some_vars);
     return false;
}

if(!checkSomeVar("a variable called some_vars")) {
   var_dump("yes");
}