[Kraeror]

Hello guys I'm trying to check if in a string there are only letters. I want to do it myself, so I tried 2 days and it still doesn't work. Can you please tell me what I'm doing wrong, I don't want anybody to give me the code, I just want to describe what piece of my code is wrong and what to change! Here is it:

PHP код:

bool:OnlyLetters(playerid, const text[])
{
    new chars = 1;
    for(new i = 'a'; i <= 'z'; i++)
    {
        new string[256];
        format(string, sizeof(string), "%c", i);
        for(new l = 0; l <= strlen(text); l++)
        {
            if(strfind(text[l], string, false)) chars++;
        }
        format(string, sizeof(string), "%d, %d", chars, strlen(text));
        SendClientMessage(playerid, COLOR_RED, string);
        if(chars != strlen(text)) return false;
        else return true;
    }
    return false;
} 


Input: "hello123" and the variable chars shows as 10, it has to be 5 and ignore the other 3 chars("123").