LDAP sort result

[stefanschorn]

Hallo,
the following code shows a littel sort function für LDAP result arrays.

$info is the ldap result array.

the array is sorted case sensitiv :-( .

strcasecmp does't work in the EntryCompre function (or i'am to stupid).
Has anyone an idea sort the array case insensitiv?

function EntryCompare($a,$b)
{
$sortfield = "cn";

    if ($a[$sortfield]==$b[$sortfield])
    { 
       return 0; 
    }
    if ($a[$sortfield] > $b[$sortfield])
    { 
       return 1; 
    }
    else
    { 
       return -1; 
    }

}

usort($info, EntryCompare);

[Anon]

function EntryCompare($a,$b)
{
$sortfield = "cn";
$a = strtolower($a[$sortfield]);
$b = strtolower($b[$sortfield]));
if ($a==$b){
return 0;
}
if ($a > $b) {
return 1;
}
return -1;

}

This assumes you are sorting a string, as opposed to an int. Yopu can differentiate between a String and an Int by using a type check..
$a =$a[$sortfield];
$b = $b[$sortfield];
if (is_string($a) && is_string($b)){
$a = strtolower($a);
$b = strtolower($b);
}

I have written a class specifically for this, but I don't have the source code on this PC. I'll try and post the class sometime.

NOTE: Since the function is exited when a reurn is encountered, the if-else statement was unneccessary.

[Anon]

Hallo, thx for the help.

Here is the new code i tried
At the end you can find the sort result;

function EntryCompare($a,$b)
{
$sortfield = "cn";
$a =$a[$sortfield];
$b = $b[$sortfield];
if (is_string($a) && is_string($b))
{
$a = strtolower($a);
$b = strtolower($b);
}
if ($a==$b){
return 0;
}
if ($a > $b) {
return 1;
}
return -1;
}

Here is the result table of groups from ldap

AG_BOE EDV

AG_GS_SNM
AG_HV_User

AG_Postmaster
AG_SNM
AG_VIRUSMASTER
AG_around-life
AG_hostmaster
AG_webmaster
PROXY-8080
PROXY-8090
PROXY-GDVPKV

AG_around-life
after
AG_VIRUSMASTER ???
...

I have no more idea with usort()

May be a Problem with "_" an case, the CN's are mixed with a lot of characters.
Whenn you have a function which will work, so i'am very interested in it :-)

Thx Stefan

[Anon]

I have not used ldap, but since it is a directory access protocol, then I assume the values you are getting are actually resource identifiers, and not strings, which would explain the results you are getting. The if statement never executes. Try casting them to strings. and just get rid of the if statement.

function EntryCompare($a,$b)
{
$sortfield = "cn";
$a =(string)$a[$sortfield];
$b = (string)$b[$sortfield];
$a = strtolower($a);
$b = strtolower($b);

                      if ($a==$b){ 
                      return 0; 
                      } 
                      if ($a > $b) { 
                      return 1; 
                      } 
                      return -1; 
                      }

Or if you prefer use settype($a,"string"), settype($b,"string");

That's some pretty hacked up code, but it should work, and give you something to work with. You can make something a bit more robust.

[Anon]

Hallo,

i found the mistake, i get an array in $a, $b and so i hat to give [0] to $a,$b.
Thx again - now it works

function EntryCompare($a,$b)
{
$sortfield = "cn";
$a = $a[$sortfield];
$b = $b[$sortfield];

  $a = strtolower($a[0]);  // <-- [0]
  $b = strtolower($b[0]);  // <-- [0]

  if ($a==$b)
  { 
     return 0; 
  } 
  if ($a > $b) 
  { 
     return 1; 
  } 
  return -1; 

}

[biggus]

or, you could use natcasesort(). It is a case-insensitive sort function.