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Retrieve information for all entries where the surname starts with "S" from a directory server, displaying an extract with name and email address.
Example 1. LDAP search example <?php // basic sequence with LDAP is connect, bind, search, interpret search // result, close connection echo "<h3>LDAP query test</h3>"; echo "Connecting ..."; $ds=ldap_connect("localhost"); // must be a valid LDAP server! echo "connect result is ".$ds."<p>"; if ($ds) { echo "Binding ..."; $r=ldap_bind($ds); // this is an "anonymous" bind, typically // read-only access echo "Bind result is echo "Bind result is ".$r."<p>"; echo "Searching for (sn=S*) ..."; // Search surname entry $sr=ldap_search($ds,"o=My Company, c=US", "sn=S*"); echo "Search result is ".$sr."<p>"; echo "Number of entires returned is ".ldap_count_entries($ds,$sr)."<p>"; echo "Getting entries ...<p>"; $info = ldap_get_entries($ds, $sr); echo "Data for ".$info["count"]." items returned:<p>"; for ($i=0; $i<$info["count"]; $i++) { echo "dn is: ". $info[$i]["dn"] ."<br>"; echo "first cn entry is: ". $info[$i]["cn"][0] ."<br>"; echo "first email entry is: ". $info[$i]["mail"][0] ."<p>"; } echo "Closing connection"; ldap_close($ds); } else { echo "<h4>Unable to connect to LDAP server</h4>"; } ?> |
You will need to get and compile LDAP client libraries from either the University of Michigan ldap-3.3 package or the Netscape Directory SDK. You will also need to recompile PHP with LDAP support enabled before PHP's LDAP calls will work.
Before you can use the LDAP calls you will need to know ..
The name or address of the directory server you will use
The "base dn" of the server (the part of the world directory that is held on this server, which could be "o=My Company,c=US")
Whether you need a password to access the server (many servers will provide read access for an "anonymous bind" but require a password for anything else)
The typical sequence of LDAP calls you will make in an application will follow this pattern:
ldap_connect() // establish connection to server
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ldap_bind() // anonymous or authenticated "login"
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do something like search or update the directory
and display the results
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ldap_close() // "logout"
Lots of information about LDAP can be found at
The Netscape SDK contains a helpful Programmer's Guide in .html format.
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