(PHP 4, PHP 5)
ldap_mod_add — Add attribute values to current attributes
$link_identifier
   , string $dn
   , array $entry
   )
   Adds one or more attributes to the specified dn.
   It performs the modification at the attribute level as opposed to the
   object level. Object-level additions are done by the
    ldap_add() function.
  
link_identifier
     An LDAP link identifier, returned by ldap_connect().
dn
     The distinguished name of an LDAP entity.
entry
     
   成功时返回 TRUE, 或者在失败时返回 FALSE。
  
Note: 此函数可安全用于二进制对象。