[英]How to check if any variables are set?
checking if all are set 检查是否全部设置
if(
isset($var1) &&
isset($var2) &&
isset($var3)
){}
can be re-written as 可以重写为
if(isset($var1,$var2,$var3)){}
but what's the syntax for if any are set? 但什么是对,如果任何设置的语法?
if(
isset($var1) ||
isset($var2) ||
isset($var3)
){}
Looks ugly; 看起来很丑; is there any better way to write this?
有什么更好的方法可以写这个吗?
You have to pass strings instead of the variables, but for fun: 您必须传递字符串而不是变量,但这很有趣:
if(compact('var1', 'var2', 'var3')) {
echo 'one or more is set';
} else {
echo 'none are set';
}
I guess one could write a simple function to use, but there's probably a cleaner way. 我想可以编写一个简单的函数来使用,但是可能有一种更简洁的方法。
function anyset(...$vars){
foreach($vars as $var){
if(isset($var)){
return true;
}
}
return false;
}
if(anyset($var1,$var2,$var3)){}
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