ldap_errno
    (PHP 3>= 3.0.12, PHP 4 )
ldap_errno --       Return the LDAP error number of the last LDAP command     
Description
int 
ldap_errno ( resource link_identifier)
     Return the LDAP error number of the last LDAP command for this      link.
     This function returns the standardized error number returned by      the last LDAP command for the given      link_identifier. This number      can be converted into a textual error message using      ldap_err2str().
     Unless you lower your warning level in your php.ini sufficiently      or prefix your LDAP commands with @ (at) characters to suppress      warning output, the errors generated will also show up in your      HTML output.      
| Example 1. Generating and catching an error | <?php
// This example contains an error, which we will catch.
$ld = ldap_connect("localhost");
$bind = ldap_bind($ld);
// syntax error in filter expression (errno 87),
// must be "objectclass=*" to work.
$res =  @ldap_search($ld, "o=Myorg, c=DE", "objectclass");
if (!$res) {
    printf("LDAP-Errno: %s<br>\n", ldap_errno($ld));
    printf("LDAP-Error: %s<br>\n", ldap_error($ld));
    die("Argh!<br>\n");
}
$info = ldap_get_entries($ld, $res);
printf("%d matching entries.<br>\n", $info["count"]);
 ?> | 
 | 
     See also ldap_err2str() and      ldap_error().