Help me check whether the code is standard, if statement judgment

Help me check whether the code is standard. if statements Judge $ hosturl = $ _ SERVER ['php _ SELF ']; & nbsp; // Obtain the current urlif & nbsp; $ hosturl = "/index. php "& nbsp; // if the URL is equal to/index. php, enter the body field content {$ s ['bod help me check whether this code is standard, if statement judgment

$ Hosturl = $ _ SERVER ['php _ SELF ']; // Obtain the current url
If $ hosturl = "/index. php" // if the URL is equal to/index. php, enter the content of the body field.
{
$ S ['body'];
Exit;
}

Is there a problem with this code?

------ Solution --------------------
Yes.
1 if (xxx), no parentheses.
2 = value assignment; = condition judgment