ldap_get_attributes

(PHP 4, PHP 5, PHP 7)

ldap_get_attributes — Get attributes from a search result entry

说明

array ldap_get_attributes ( resource $link_identifier , resource $result_entry_identifier )

Reads attributes and values from an entry in the search result.

Having located a specific entry in the directory, you can find out what information is held for that entry by using this call. You would use this call for an application which "browses" directory entries and/or where you do not know the structure of the directory entries. In many applications you will be searching for a specific attribute such as an email address or a surname, and won't care what other data is held. 

return_value["count"] = number of attributes in the entry
return_value[0] = first attribute
return_value[n] = nth attribute

return_value["attribute"]["count"] = number of values for attribute
return_value["attribute"][0] = first value of the attribute
return_value["attribute"][i] = (i+1)th value of the attribute

参数

link_identifier

An LDAP link identifier, returned by ldap_connect().

result_entry_identifier

返回值

Returns a complete entry information in a multi-dimensional array on success and FALSE on error.

范例

Example #1 Show the list of attributes held for a particular directory entry

<?php
// $ds is the link identifier for the directory

// $sr is a valid search result from a prior call to
// one of the ldap directory search calls

$entry = ldap_first_entry($ds, $sr);

$attrs = ldap_get_attributes($ds, $entry);

echo $attrs["count"] . " attributes held for this entry:<p>";

for ($i=0; $i < $attrs["count"]; $i++) {
    echo $attrs[$i] . "<br />";
}
?>

参见

User Contributed Notes

dunc at rumbletum dot org 18-Oct-2007 11:52
I spent quite a while scratching my head about how to read operational attributes such as create and modify timestamps.

This function solved it....

function get_entry_system_attrs( $ds, $dn, $deref=LDAP_DEREF_NEVER )
{
   $conn = $ds;
   $attrs = array( 'creatorsname', 'createtimestamp', 'modifiersname',
         'structuralObjectClass', 'entryUUID',  'modifytimestamp',
         'subschemaSubentry', 'hasSubordinates', '+' );
   $search = @ldap_read( $conn, $dn, '(objectClass=*)', $attrs, 0, 0, 0, $deref );
   if( ! $search )
      return false;
   $entry = ldap_first_entry( $conn, $search );
   if( ! $entry)
       return false;
   $attrs = ldap_get_attributes( $conn, $entry );
   if( ! $attrs )
      return false;
   if( ! isset( $attrs['count'] ) )
      return false;
   $count = $attrs['count'];
   unset( $attrs['count'] );
   $return_attrs = array();
   for( $i=0; $i<$count; $i++ ) {
      $attr_name = $attrs[$i];
      unset( $attrs[$attr_name]['count'] );
      $return_attrs[$attr_name] = $attrs[$attr_name];
   }
   return $return_attrs;
}
Snezko Snezak 27-Jul-2006 10:06
Code and function to extract all attributes from all entryes in a certain DN. Maybe not the most timewise efficient but it works.

$entry = ldap_first_entry($ds, $sr);
write_attr($entry,$ds);
for ($i = 0; $i < $n_entries; $i++){
   $entry = ldap_next_entry($ds, $entry);
   write_attr($entry,$ds);
}

function write_attr($entry,$ds){
   $attrs = ldap_get_attributes ($ds, $entry);
   for ($j = 0; $j < $attrs["count"]; $j++){
      $attr_name = $attrs[$j];
      $attrs["$attr_name"]["count"] . "\n";
      for ($k = 0; $k < $attrs["$attr_name"]["count"]; $k++) {
             echo ">>>>>>";
             echo $attr_name.": ".$attrs["$attr_name"][$k]."\n";
      }
   }
}
php dot net at hiddemann dot org 02-Jul-2004 07:59
Note that ldap_get_attributes fetches attributes AND values from the LDAP server. Depending on the data stored in the entry, the following code might work a dozen times faster (or even better, but faster in general) than the code in Example 1:

<?php
// $ds is the link identifier for the directory

// $sr is a valid search result from a prior call to
// one of the ldap directory search calls

$entry = ldap_first_entry($ds, $sr);

$attrs = array();
$attribute = ldap_first_attribute($ds,$entry,$identifier);
while ($attribute) {
   $attrs[] = $attribute;
   $attribute=ldap_next_attribute($ds,$entry,$identifier);
}

echo count($attrs) . " attributes held for this entry:<p>";

for ($i=0; $i<count($attrs); $i++) {
   echo $attrs[$i] . "<br />";
}
?>

You may want to check the time difference with the function "microtime".
kop at meme dot com 29-Jul-2003 08:28
It's good practice to use array_change_key_case() on the result of ldap_get_attributes() so your program can ignore case in attribute names just like ldap itself does.  (You wouldn't want ldap_get_attributes to _always_ flatten the case because you need a way to get the attribute names in a pretty format for display to the user.)
allie at pajunas dot com 21-May-2002 05:52
The array created by this function is similar to the on from ldap_get_entries() but when it creates array keys it alters the attribute's case inconsistently. 

ldap_get_entries() lowercases all of the attributes before keying the array with them, but this function appears to leave things as they are.

If you're having problems, do a print_r and make sure you're using correct case for array keys.  For example, you might need to use "objectClass" and not "objectclass".
software at inebria dot com 21-Jun-2001 07:31
As of PHP 4.0.5, the ldap_get_attributes function does not work with binary data.  If you're fetching a JPEG from an LDAP server, use ldap_get_values_len instead.