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POldap_search will not accept filter with parentheses in the search input
 

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    <p>In a php page I'm working on, an LDAP connection is established from which a list of cn entries are pulled and put into a dropdown. The selection from the dropdown is sent via form submission to another php scrips which checks the selected cn against the LDAP to grab more associated information.</p> <p>For most names this is no problem; however, a cn was recently added that includes parentheses enclosing a nickname, and when that name is selected it causes the ldap_search() method to return false. Below is the code, where $employeename is the sanitized employee name.</p> <pre><code>... $dn = "cn=users,dc=our-domain,dc=com"; $filter = "(cn=".$employeename.")"; $attrs = array("cn", "mail"); $rslt = ldap_search($ldapsvr, $dn, $filter, $attrs); $entries = ldap_get_entries($ldapsvr, $rslt); ... </code></pre> <p>The $filter string ends up as </p> <pre><code>(cn=First (FN) Last) </code></pre> <p>where First is the first name, Last is the last name, and FN is the included nickname. I have tried escaping the parentheses as \28 and \29 (as provided <a href="http://www.rlmueller.net/CharactersEscaped.htm" rel="nofollow">here</a>, where it also says matched parentheses do not need to be escaped), but it did not help. Names that work include letters, spaced, and periods (for middle initials).</p> <pre><code>(cn=First \28FN\29 Last) </code></pre> <p>EDIT: ldap_search is returning false, not dying. One of the lines I included while investigating would fail and die if $rslt was false and not an array.</p> <p>EDIT: I escaped the inner parentheses only,. as the outer never gave any trouble</p>
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    1. COWhat kind of error occurs without adding the escaped characters?
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    2. COWith unescaped characters, ldap_search() returns false. I think confused myself while writing the question; while testing, print_r($rslt) would cause the script to die when the search returned false. I'll fix the the question. Sorry about that
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    3. COHave you tried tailing the LDAP server log to see what it says about the query coming across from PHP?
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