int ldap_read(int link_identifier, string base_dn, string filter, array [attributes]);
Returns a search result identifier or false on error.
ldap_read() performs the search for a specified filter on the directory with the scope LDAP_SCOPE_BASE. So it is equivalent to reading an entry from the directory.
An empty filter is not allowed. If you want to retrieve absolutely all information for this entry, use a filter of "objectClass=*". If you know which entry types are used on the directory server, you might use an appropriate filter such as "objectClass=inetOrgPerson".
This call takes an optional fourth parameter which is an array of the attributes required. See ldap_search() notes.