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CHAPTER 17 • PHP AND LDAPwww.it-ebooks.infoRobert GilmoreInserting LDAP DataInserting data into the directory is as easy as retrieving it. In this section, two of PHP’s LDAP insertionfunctions are introduced.Adding a New EntryYou can add new entries to the LDAP directory with the ldap_add() function. Its prototype follows:Boolean ldap_add(resource link_id, string dn, array entry)An example follows, although keep in mind this won’t execute properly because you don’t possessadequate privileges to add users to the WJGilmore directory:Pretty simple, huh? But how would you add an attribute with multiple values? Logically, you woulduse an indexed array:$entry["displayName"] = "John Wayne";$entry["company"] = "Cowboys, Inc.";$entry["mail"][0] = "pilgrim@example.com";$entry["mail"][1] = "wayne.2@example.edu";ldap_add($connection, $dn, $entry) or die("Could not add new entry!");Adding to Existing EntriesThe ldap_mod_add() function is used to add additional values to existing entries, returning TRUE onsuccess and FALSE on failure. Its prototype follows:Boolean ldap_mod_add(resource link_id, string dn, array entry)Revisiting the previous example, suppose that the user John Wayne requested that another e-mailaddress be added. Because the mail attribute is multivalued, you can just extend the value array usingPHP’s built-in array expansion capability. An example follows, although keep in mind this won’t execute360