3F

$str = "learning trails provide you with everything you need to..";
foreach(Util::getSymbol($str, 0) as $cur){
    echo Util::charToHex($cur); // 6C6561726E696E672074...
}

...

/**
 * @param string $str
 * @param int $start

3F

// Java
/* *** test1 *** */

class A
{
    public String p = "from A";
    public String m()
    {
        return this.p;
    }

3F

/* **** JAVA ******************************** */
class A
{
    public String p = "from A";
    public String m()
    {
        return this.p; // or simple p
    }
}