note 130565 added to function.ldap-search

A big warning sign must be placed on $filter field. The filter MUST be present and it MUST NOT be empty. Else you will receive mysterious "Can't contact LDAP server" error and no help from google. The single clue could be found when running ldapsearch CLI tool to verify your code - in verbose mode, it clearly states that, in absence of user-specified filters, it adds an (objectclass=*) filter to avoid an error. ``` $ ldapsearch -H ldaps://dc2.ads.darkdragon.lan -vvv -b 'CN=Users,DC=ads,DC=darkdragon,DC=lan filter: (objectclass=*) requesting: All userApplication attributes # extended LDIF # # LDAPv3 # base <CN=Users,DC=ads,DC=darkdragon,DC=lan> with scope subtree # filter: (objectclass=*) # requesting: ALL # … ``` ---- Server IP: 206.189.2.9 Probable Submitter: 95.165.144.62 ---- Manual Page -- https://php.net/manual/en/function.ldap-search.php Edit -- https://main.php.net/note/edit/130565 Del: integrated -- https://main.php.net/note/delete/130565/integrated Del: useless -- https://main.php.net/note/delete/130565/useless Del: bad code -- https://main.php.net/note/delete/130565/bad+code Del: spam -- https://main.php.net/note/delete/130565/spam Del: non-english -- https://main.php.net/note/delete/130565/non-english Del: in docs -- https://main.php.net/note/delete/130565/in+docs Del: other reasons-- https://main.php.net/note/delete/130565 Reject -- https://main.php.net/note/reject/130565 Search -- https://main.php.net/manage/user-notes.php