将http：//添加到开头有双斜杠的网址（或者没有）

Question

For instance, I need to add http:// to submitted url like :

//www.mydomain.com/images/icon-32.png (double slash at the beginning)

or

www.mydomain.com/images/icon-32.png

Any idea?

Answer 1

This seems to work fine for your problem.

$url = "//mydomain.com/images/icon-32.png";
// or $url = "mydomain.com/images/icon-32.png";
// Checking if string starts with '//'
if(strpos($url, "//")===0){
    $url = "http:" . $url;
}else{
    // Checking if string doesn't already start with 'http://'
    if(!strpos($url, "http://")===0 || strpos($url, "http://")===false)
        $url = "http://" . $url;
}
echo $url;