如何对 PHP 中的函数执行 if 语句？
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How to do an if statement on a function in PHP?
提问by Bruce
I just realized that you can't just use an if statement on a function, for example this doesn't work:
我刚刚意识到你不能只在函数上使用 if 语句，例如这不起作用：
function sayHello()
{
echo "Hello World";
}
if(sayHello())
echo "Function Worked";
else
echo "Function Failed";
I also saw that a function can't be put as the value of a variable. So how can I do an if statement to check if a function has executed properly and display it to the browser?
我还看到函数不能作为变量的值。那么我如何做一个 if 语句来检查一个函数是否正确执行并将其显示给浏览器？
回答by lemon
It's not working since sayHello()doesn't return anything place return truein there or something.
它不起作用，因为sayHello()没有返回任何地方return true或其他东西。
回答by fastcodejava
if (sayHello() === FALSE)
echo "Function Failed";
else
echo "Function Worked";
回答by user3664663
this will work
这会起作用
<?php
$name1 = "bobi";
function hello($name) {
if($name == "bobi"){
echo "Hello Bob";
} else {
echo "Morning";
}
}
hello($name1);
?>
回答by Ugur Pekesen
function selam($isim)
{
if ($isim == 'ugur') {
return 'Selam '.$isim.' :)';
}
return 'Sen kimsin kardes?';
}
echo selam('ugur');
