[Kraeror]

Hello guys I need to check if in the string is only letters, so I created a stock for this, but it doesn't work.
Here is it:

PHP код:

stock OnlyLetters(text[])
{
    for(new i = 'a'; i <= 'z'; i++)
    {
        for(new i2 = 'A'; i2 <= 'Z'; i2++)
        {
            new string[256], string2[256];
            format(string, sizeof(string), "%c", i);
            format(string2, sizeof(string2), "%c", i2);
            if(strfind(text, string, true) == 1 && strfind(text, string2, true) == 1)
            {
                return 0;
            }
        }
    }
    return 1;
} 


Please help