Maybe?
PHP Code:
public fw_takedamage(victim, inflictor, attacker, Float:dam, bits)
{
if (!(bits & DMG_BULLET && inflictor == attacker))
return HAM_IGNORED
client_print(inflictor, print_chat, "[TAKEDAM] Weap:%d Damage:%f", get_weapon(victim), dam)
return HAM_IGNORED
}