无法弄清楚如何使substr_compare正常工作（PHP）

Question

So I have this basic script:

/*check if email is valid*/
if (substr_compare ( $email , '@' , 0 )>0)
{   
/*put user to temporary database*/      
echo 'registration script';
}else{echo 'wrong mail';};

What I want to do is I want to check if string contains symbol '@' (if mail is valid). But it does not work: when I set up variable $email to something like 'name' = the function returns '1', though I assume it should return 0 or -1, as the letter is not there. What am I missing?

Answer 1

To check if the sctring contains another substring you need to use strpos (not compare function such as substr_compare):

if (strpos($email, '@') !== null) { ... }

And yes, the way you check for email address is pretty weak. Use regular expressions or built in PHP filters like

if (filter_var($email, FILTER_VALIDATE_EMAIL)) { ... }