[BlackFoX]

Код:

CheckName(const str[],firstname = 4,lastname = 4) 
{
	new pos = strfind(str, "_", true);
	return (pos!=-1 && pos >=firstname && strlen(str[pos+1]) >= lastname);
}

Код:

if(CheckName("Player_Name")) // Returns True cause the Name Contains at First more than 4 Chars and the lastname 4

Код:

if(CheckName("Player_Name",4,4)) // with ur own Limit