To remove all instances of an attribute:
$entry["attrname"][]="value1";
$entry["attrname"][]="value2";
...
$entry["attrname"][]="valueN";
ldap_mod_del($ds, $dn, $entry);
To remove all instances of an attribute:
$entry["attrname"][]="value1";
$entry["attrname"][]="value2";
...
$entry["attrname"][]="valueN";
ldap_mod_del($ds, $dn, $entry);