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What does Theses "Loops" Means? - Printable Version

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What does Theses "Loops" Means? - TheRaGeLord - 19.07.2015

What does this loop means?

1)
PHP код:
enum USER_DATA
{
    USER_ID,
    USER_NAME[ MAX_PLAYER_NAME ],
    USER_PASSWORD[ 129 ],
    USER_ADMIN,
    bool: USER_LOGGED_IN
};
new    User[ MAX_PLAYERS ][ USER_DATA ];
public OnPlayerConnect( playerid )
{
    for( new i; i < _: USER_DATA; ++i ) User[ playerid ][ USER_DATA: i ] = 0;
    // ...
    return 1;
} 
2)
PHP код:
stock DB_Escape(text[])
{
    new
        ret[80* 2],
        ch,
        i,
        j;
    while ((ch = text[i++]) && j < sizeof (ret))
    {
        if (ch == '\'')
        {
            if (j < sizeof (ret) - 2)
            {
                ret[j++] = '\'';
                ret[j++] = '\'';
            }
        }
        else if (j < sizeof (ret))
        {
            ret[j++] = ch;
        }
        else
        {
            j++;
        }
    }
    ret[sizeof (ret) - 1] = '\0';
    return ret;
} 
Can anyone tell me that what does these both loops mean?
as I'm not able to understand them.

Re: What does Theses "Loops" Means? - Vince - 19.07.2015

The first one resets a player's data to 0. However, a (probably) more efficient way of doing that is:

PHP код:
static const emptyInfo[USER_DATA];
User[playerid] = emptyInfo; 
The second one escapes ' characters in a string for usage in SQL statements. It does this by checking each character separately and copying it to the output. Obsolete as of 0.3.7 R2 where the new format specifier %q fulfills this functionality.