asort

(PHP 4, PHP 5, PHP 7, PHP 8)

asort — 連想キーと要素との関係を維持しつつ配列を昇順にソートする

説明

asort(array &$array, int $flags = SORT_REGULAR): true

配列のキーと要素との関係を維持しつつ、 array を昇順にソートします。

この関数は、主に実際の要素の並び方が重要である連想配列をソートするために使われます。

注意:
比較結果が等しくなる二つの要素があった場合、それらの並び順は保持されます。PHP 8.0.0 より前のバージョンでは、ソートした配列におけるそれらの並び順は不定でした。

注意:
この関数をコールすると、配列の内部ポインタは最初の要素にリセットされます。

パラメータ

array

入力の配列。

flags

オプションの第二引数 flags によりソートの動作を修正可能です。使える値は下記の通りです:

ソートタイプのフラグ:

SORT_REGULAR - 通常通りに項目を比較します。詳細は比較演算子で説明されています。
SORT_NUMERIC - 数値として項目を比較します。
SORT_STRING - 文字列として項目を比較します。
SORT_LOCALE_STRING - 現在のロケールに基づいて、文字列として項目を比較します。比較に使うロケールは、setlocale() 関数で変更できます。
SORT_NATURAL - 要素の比較を文字列として行い、 natsort() と同様の「自然順」で比較します。
SORT_FLAG_CASE - SORT_STRING や SORT_NATURAL と (ビットORで) 組み合わせて使い、文字列のソートで大文字小文字を区別しないようにします。

戻り値

常に true を返します。

変更履歴

バージョン	説明
8.2.0	戻り値の型が、`true` になりました。これより前のバージョンでは、bool でした。

例

例1 asort() の例

<?php
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
asort($fruits);
foreach ($fruits as $key => $val) {
    echo "$key = $val\n";
}
?>

上の例の出力は以下となります。

c = apple
b = banana
d = lemon
a = orange

fruits はアルファベットの昇順にソートされ、各要素とキーとの関係は維持されます。

参考

sort() - 配列を昇順にソートする
arsort() - 連想キーと要素との関係を維持しつつ配列を降順にソートする
配列ソート関数の比較

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User Contributed Notes 31 notes

down

104

nick ([AT]) nickyost ([DOT]) com ¶

13 years ago

This function can be used to sort multidimensional arrays with almost no work whatsoever by using the individual values within the custom sort function.

This function passes the entire child element even if it is not a string. If it is an array, as would be the case in multidimensional arrays, it will pass the whole child array as one parameter.

Therefore, do something elegant like this:

<?php
     // Sort the multidimensional array
     usort($results, "custom_sort");
     // Define the custom sort function
     function custom_sort($a,$b) {
          return $a['some_sub_var']>$b['some_sub_var'];
     }
?>

This does in 4 lines what other functions took 40 to 50 lines to do. This does not require you to create temporary arrays or anything. This is, for me, a highly preferred solution.

Hope it helps!

down

aditycse at gmail dot com ¶

9 years ago

/*
 * Name : Aditya Mehrotra 
 * Email: aditycse@gmail.com
 */
//Example for sorting by values for an alphanumeric array also having case-sensitive data
$exampleArray1 = $exampleArray2 = array(
    0 => 'example1',
    1 => 'Example10',
    2 => 'example12',
    3 => 'Example2',
    4 => 'example3',
    5 => 'EXAMPLE10',
    6 => 'example10'
);

//default sorting
asort($exampleArray1);

// alphanumeric with case-sensitive data sorting by values
asort($exampleArray2, SORT_STRING | SORT_FLAG_CASE | SORT_NATURAL);

//output of defaut sorting
print_r($exampleArray1);
/*
 * output of default sorting
  Array
  (
  [5] => EXAMPLE10
  [1] => Example10
  [3] => Example2
  [0] => example1
  [6] => example10
  [2] => example12
  [4] => example3
  )
 */

print_r($exampleArray2);
/*
 * output of alphanumeric with case-sensitive data sorting by values
 Array
(
    [0] => example1
    [3] => Example2
    [4] => example3
    [5] => EXAMPLE10
    [1] => Example10
    [6] => example10
    [2] => example12
)
 */

down

mike at clear-link dot com ¶

16 years ago

For a recent project I needed to sort an associative array by value first, and then by key if a particular value appeared multiple times. I wrote this function to accomplish the task. Note that the parameters default to sort ascending on both keys and values, but allow granular control over each.

<?php
function aksort(&$array,$valrev=false,$keyrev=false) {
  if ($valrev) { arsort($array); } else { asort($array); }
    $vals = array_count_values($array);
    $i = 0;
    foreach ($vals AS $val=>$num) {
        $first = array_splice($array,0,$i);
        $tmp = array_splice($array,0,$num);
        if ($keyrev) { krsort($tmp); } else { ksort($tmp); }
        $array = array_merge($first,$tmp,$array);
        unset($tmp);
        $i = $num;
    }
}

// Example
$tmp = array('ca'=>1,'cb'=>2,'ce'=>1,'pa'=>2,'pe'=>1);

// Standard asort
asort($tmp);
print_r($tmp);

// Sort value ASC, key ASC
aksort($tmp);
print_r($tmp);

// Sort value DESC, key ASC
aksort($tmp,true);
print_r($tmp);

// Sort value DESC, key DESC
aksort($tmp,true,true);
print_r($tmp);

// Results
Array
(
    [pe] => 1
    [ca] => 1
    [ce] => 1
    [cb] => 2
    [pa] => 2
)
Array
(
    [ca] => 1
    [ce] => 1
    [pe] => 1
    [cb] => 2
    [pa] => 2
)
Array
(
    [cb] => 2
    [pa] => 2
    [ca] => 1
    [ce] => 1
    [pe] => 1
)
Array
(
    [pa] => 2
    [cb] => 2
    [pe] => 1
    [ce] => 1
    [ca] => 1
)

down

richard at happymango dot me dot uk ¶

18 years ago

This is a function to sort an indexed 2D array by a specified sub array key, either ascending or descending.

It is usefull for sorting query results from a database by a particular field after the query has been returned

This function can be quite greedy. It recreates the array as a hash to use ksort() then back again

By default it will sort ascending but if you specify $reverse as true it will return the records sorted descending 

<?php

function record_sort($records, $field, $reverse=false)
{
    $hash = array();
    
    foreach($records as $record)
    {
        $hash[$record[$field]] = $record;
    }
    
    ($reverse)? krsort($hash) : ksort($hash);
    
    $records = array();
    
    foreach($hash as $record)
    {
        $records []= $record;
    }
    
    return $records;
}

// Example below

$airports = array
(
    array( "code" => "LHR", "name" => "Heathrow" ),
    array( "code" => "LGW", "name" => "Gatwick" ),
);

printf("Before: <pre>%s</pre>", print_r($airports, true));

$airports = record_sort($airports, "name");

printf("After: <pre>%s</pre>", print_r($airports, true));

?>

Example Outputs:

Before: Array
(
    [0] => Array ( [code] => LHR, [name] => Heathrow )
    [1] => Array ( [code] => LGW, [name] => Gatwick )
)

After: Array
(
    [0] => Array ( [code] => LGW, [name] => Gatwick )
    [1] => Array ( [code] => LHR, [name] => Heathrow )
)

down

sweetland at whoadammit dot com ¶

24 years ago

Here's a little routine I whipped up to sort multi-dimensional arrays:

<?php

/**

 ** comesafter ($s1, $s2)

 **

 ** Returns 1 if $s1 comes after $s2 alphabetically, 0 if not.

 **/



function comesafter ($s1, $s2) {

        /**

         ** We don't want to overstep the bounds of one of the strings and segfault,

         ** so let's see which one is shorter.

         **/



        $order = 1;



        if (strlen ($s1) > strlen ($s2)) {

                $temp = $s1;

                $s1 = $s2;

                $s2 = $temp;

                $order = 0;

        }



        for ($index = 0; $index < strlen ($s1); $index++) {

                /**

                 ** $s1 comes after $s2

                 **/



                if ($s1[$index] > $s2[$index]) return ($order);



                /**

                 ** $s1 comes before $s2

                 **/



                if ($s1[$index] < $s2[$index]) return (1 - $order);

        }

 

        /**

         ** Special case in which $s1 is a substring of $s2

         **/



        return ($order);

}



/**

 ** asortbyindex ($sortarray, $index)

 **

 ** Sort a multi-dimensional array by a second-degree index. For instance, the 0th index

 ** of the Ith member of both the group and user arrays is a string identifier. In the

 ** case of a user array this is the username; with the group array it is the group name.

 ** asortby

 **/



function asortbyindex ($sortarray, $index) {

        $lastindex = count ($sortarray) - 1;

        for ($subindex = 0; $subindex < $lastindex; $subindex++) {

                $lastiteration = $lastindex - $subindex;

                for ($iteration = 0; $iteration < $lastiteration;    $iteration++) {

                        $nextchar = 0;

                        if (comesafter ($sortarray[$iteration][$index], $sortarray[$iteration + 1][$index])) {

                                $temp = $sortarray[$iteration];

                                $sortarray[$iteration] = $sortarray[$iteration + 1];

                                $sortarray[$iteration + 1] = $temp;

                        }

                }

        }

        return ($sortarray);

}

?>



It's a bit long with all the comments, but I hope it helps.

down

mike at clear-link dot com ¶

16 years ago

Small typo in the aksort function I just submitted. Here's the entire thing again, with the correction noted:

<?php
function aksort(&$array,$valrev=false,$keyrev=false) {
  if ($valrev) { arsort($array); } else { asort($array); }
  $vals = array_count_values($array);
    $i = 0;
    foreach ($vals AS $val=>$num) {
        $first = array_splice($array,0,$i);
        $tmp = array_splice($array,0,$num);
        if ($keyrev) { krsort($tmp); } else { ksort($tmp); }
        $array = array_merge($first,$tmp,$array);
        unset($tmp);
        $i = $i+$num;
        // Fixed from previous post: $i = $num;
    }
}
?>

down

php at web-in-time dot com ¶

18 years ago

acecream's function works fine, especially with the spectre extension.

nevertheless sometimes the index values have to be kept. To achieve this, just replace:

$sorted_arr[] = $array[$arr_key];  

with:

$sorted_arr[$arr_key] = $array[$arr_key];

down

Anon ¶

13 years ago

Case insensitive sort in one line:

<?php

array_multisort(array_map('strtolower', $array), $array);

?>

down

mbevan at marginsoftware dot com ¶

22 years ago

Nevermind... use my last note as a quick tip: if you wish to keep the keys, use asort() and arsort() in place of sort() and rsort().

down

jacko at kring dot co dot uk ¶

24 years ago

asort has one anoying feature, it ignores any default or implicit order in the data.  i.e. if two elements of an array contain "banana" then it is not garanteed that the first will still be the first after the sort.

This makes the Burrows-Wheeler block sort a bit of a pain to impliment, with a trailing string having to be appended to all strings before sorting, and removed after sorting. To maintain the so called "banana" order.

down

freeman at generalresources dot com ¶

23 years ago

The asortbyindex($sortarray, $index) looks like sort not asort. The key of the $sortarray was changed.

down

rcwang at cmu dot edu ¶

22 years ago

Here's my version of sorting multi-dimensional array by 2nd index.

Feel free to change the code to suit your needs.



<?php

function aSortBySecondIndex($multiArray, $secondIndex) {

    while (list($firstIndex, ) = each($multiArray))

        $indexMap[$firstIndex] = $multiArray[$firstIndex][$secondIndex];

    asort($indexMap);

    while (list($firstIndex, ) = each($indexMap))

        if (is_numeric($firstIndex))

            $sortedArray[] = $multiArray[$firstIndex];

        else $sortedArray[$firstIndex] = $multiArray[$firstIndex];

    return $sortedArray;

}

?>

down

richard at happymango dot me dot uk ¶

18 years ago

This is a fixed version of the same function I posted below. Now it will handle duplicate entries in the sorted field. EG: If there were two records that had the name Heathrow it would still work. 

<?php

function record_sort($records, $field, $reverse=false)
{
    $hash = array();
    
    foreach($records as $key => $record)
    {
        $hash[$record[$field].$key] = $record;
    }
    
    ($reverse)? krsort($hash) : ksort($hash);
    
    $records = array();
    
    foreach($hash as $record)
    {
        $records []= $record;
    }
    
    return $records;
}

?>

down

rojaro ¶

20 years ago

Advanced sort array by second index function, which produces ascending (default) or descending output and uses optionally natural case insensitive sorting (which can be optionally case sensitive as well).
Only the first two arguments are required.

<?php

function sabsi ($array, $index, $order='asc', $natsort=FALSE, $case_sensitive=FALSE) {
  if(is_array($array) && count($array)>0) {
    foreach(array_keys($array) as $key) $temp[$key]=$array[$key][$index];
    if(!$natsort) ($order=='asc')? asort($temp) : arsort($temp);
    else {
      ($case_sensitive)? natsort($temp) : natcasesort($temp);
      if($order!='asc') $temp=array_reverse($temp,TRUE);
    }
    foreach(array_keys($temp) as $key) (is_numeric($key))? $sorted[]=$array[$key] : $sorted[$key]=$array[$key];
    return $sorted;
  }
  return $array;
}

?>

down

salchicha at cable dot net dot co ¶

22 years ago

Here's one I whipped up to allow you to sort an array of a specific class by a member or function:



<?php

// Sort a class by one of its members (even lowercase!!!)

function casort($arr, $var) {

   $tarr = array();

   $rarr = array();

   for($i = 0; $i < count($arr); $i++) {

      $element = $arr[$i];

      $tarr[] = strtolower($element->{$var});

   }



   reset($tarr);

   asort($tarr);

   $karr = array_keys($tarr);

   for($i = 0; $i < count($tarr); $i++) {

      $rarr[] = $arr[intval($karr[$i])];

   }



   return $rarr;

}

?>



It works very well. For example, I have a Room class with members title, isActive(), date, etc. I can sort an array by casort($rooms, "title") or casort($rooms, "isActive()") and it'll work.

down

Jesse K ¶

4 years ago

'asort' is fine for sorting arrays in English, but if accented characters exist in the array then it is better to use the 'asort' method of PHP's Collator class:
https://www.php.net/manual/en/class.collator.php

$collator = new \Collator('fr_CA');
$collator->asort($french_list);

There are options for using `setlocale()` to control `asort` behaviour, but it isn't reliable across systems.
For instance, in my development environment I only have access to the following locals:

$ locale -a
C
C.UTF-8
POSIX

down

Anonymous ¶

22 years ago

Similar to above but for an array of arrays instead of an array of objects.



<?php

function aasort($x,$var,$cmp='strcasecmp'){

  if ( is_string($var) ) $var = "'$var'";

  uasort($x,

    create_function('$a,$b',

      'return '.$cmp.'( $a['.$var.'],$b['.$var.']);')

  );

  return $x;

}

?>

down

-1

marty8zhang at gmail dot com ¶

4 years ago

"This function sorts an array such that array indices maintain their correlation with the array elements they are associated with."

Note this sentence in the description has a quite important implication especially when you're working with an originally non-indexed (or say integer-indexed) array and JSON encoding/decoding.
I'm not reporting this as a bug, because the end result does fit into the description.

<?php

$myArray = ['small_image', 'image'];
var_dump(json_encode($myArray)); // string(23) "["small_image","image"]"
var_dump(is_object($myArray)); // bool(false)

asort($myArray);
$myJson = json_encode($myArray);
var_dump($myJson); // string(31) "{"1":"image","0":"small_image"}"
var_dump(is_object($myArray)); // bool(false)

/*
 * class stdClass#1 (2) {
 *     public $1 =>
 *     string(5) "image"
 *     public $0 =>
 *     string(11) "small_image"
 * }
 */
var_dump(json_decode($myJson));

?>

down

przemekkus [at] interia [dot] pl ¶

17 years ago

Function written by a dot brandon at chello dot nl has an error  - wrong variable name. It should be:

if($rev) arsort($named_hash,$flags=0) ;

instead of

if($reverse) arsort($named_hash,$flags=0) ;

down

gunnar at taljaren dot se ¶

17 years ago

for ($i=0;$i<5;$i++)
   $values[] = $i;
asort($values);  

works, but
for ($i=0;$i<5;$i++)
   $values[$i] =$i;
asort($values);
doesn't!

down

smileaf at smileaf dot org ¶

17 years ago

Ok I was mistaken, after re-reading the previous post the ".$key" is important. What caused the sorting issue for me wasn't that at all. But rather something else.
doing an: asort($records, $flags); before returning fixes the sorting problems.
The sorting problem I was refearing to causes a character based sorting done on numeric data.
so instead of:
1
2
3
...
10
12
20
It was returned back as
1
10
12
2
20
3
...
basically what I was trying to fix in the first place.

down

-1

Eran ¶

15 years ago

i made this sample multi dimensional array sort to someone who needed to read lines from a text file instead of using sql - order by statement.

the idea is to take the key and sort(order) the specific column and then order the entire of the array as the selected column asort returned.

<?php
/**
 * 
 * This sample is reading text data
 * and perform a sort to a 2 dimensional array
 * just like a normal sql do to "order by asc" 
 * 
 */

$foo = array();

/*
# SORT_REGULAR - compare items normally (don't change types)
# SORT_NUMERIC - compare items numerically
# SORT_STRING - compare items as strings
*/
$sort_by = SORT_REGULAR;

/*
# 0 - order by name column
# 1 - order by age column
# 2 - order by rank column
# 3 - order by color column
*/
$order_by = 1;

// source file
$line_of_text[1] = 'a1name|f2age|h3rank|jcolor';
$line_of_text[2] = 'b1name|d2age|i3rank|k4color';
$line_of_text[0] = 'c1name|e2age|g3rank|l4color';

// make array
for ($x=0; $x<=2; $x++)
{
    $line = explode('|',$line_of_text[$x]);

    // save it by coulmns otherwise it will saved like rows
    for ($i=0; $i<=3; $i++) {
          $foo[$i][$x] = $line[$i];
    }
}

// get the key order
$a = $foo[$order_by];

// sort
asort($a, $sort_by);

// start print
echo "<table cellpudding=0 cellspacing=0 border=1>\n";
        echo "<tr>\n";
          echo "<td>key</td>\n";
          echo "<td>name</td>\n";
          echo "<td>age</td>\n";
          echo "<td>rank</td>\n";
          echo "<td>color</td>\n";
        echo "</tr>\n";

// print by key order
foreach ($a as $k => $v) {
    echo "<tr>\n";
      echo "<td>$k</td>\n";
      // you can print here a for loop (0 to num of columns[=3])
      echo "<td>".$foo[0][$k]."</td>\n";
      echo "<td>".$foo[1][$k]."</td>\n";
      echo "<td>".$foo[2][$k]."</td>\n";
      echo "<td>".$foo[3][$k]."</td>\n";
    echo "</tr>\n";
}
echo "</table>\n";
?>

down

-1

spectre at hellfish dot NOSPAM dot org ¶

21 years ago

that works nicely, tho it breaks the result-array up if one or more of arrays indexes are deleted before sorting. this one should fix it up:

change:
for ($i = 0; $i < sizeof($array); $i++) {

to:
foreach ($array as $i => $k) {

down

-1

a dot brandon at chello dot nl ¶

17 years ago

I use this for quasi-SQL orderby. Loosely based on smileaf. Any good for you nerds?

<?

function named_records_sort($named_recs, $order_by, $rev=false, $flags=0)
{// Create 1-dimensional named array with just 
 // sortfield (in stead of record) values
    $named_hash = array(); 
     foreach($named_recs as $key=>$fields) 
             $named_hash["$key"] = $fields[$order_by];
 
 // Order 1-dimensional array, 
 // maintaining key-value relations   
    if($reverse) arsort($named_hash,$flags=0) ;
    else asort($named_hash, $flags=0);
  
 // Create copy of named records array 
 // in order of sortarray  
    $sorted_records = array(); 
    foreach($named_hash as $key=>$val) 
           $sorted_records["$key"]= $named_recs[$key];
  
return $sorted_records;} // named_recs_sort()

function show_sorted_records($named_recs, $order_by, $rev=false, $flags=0)
{$sorted_records=named_records_sort($named_recs, $order_by, $rev, $flags);
foreach($sorted_records as $name=>$fields) 
  {echo "<b>$name</b>   "; 
   foreach($fields as $field=>$val) 
          echo "$field = $val "; echo "<br>";}
} // show_sorted_records()

$girl_friends=array();
$girl_friends["Anna"]=
array("born"=>'1989-08-22',"cupsize"=>'B-',"IQ"=>105, "daddy"=>'rich');
$girl_friends["Zoe"]
=array("born"=>'1978-03-11',"cupsize"=>'C#',"IQ"=>130, "daddy"=>'poor');
$girl_friends["Lilly"]
=array("born"=>'1985-06-16',"cupsize"=>'DD',"IQ"=>90, "daddy"=>'nasty');

$order_by="cupsize"; echo "And the winners are: <br>";
show_sorted_records($girl_friends, $order_by, true);

?>

down

-1

stephen [ at ] brooksie-net [ dot ] co [ dot ] uk ¶

11 years ago

It is obviously necessary to log the keys used as so we don't overwrite previous entries in the array ;o)



N.B. this also effects the timings, but still faster than the alternatives : 



     * int : 0.00159    (ms)

     * str : 0.00092    (ms)



<?php

private function _keySort(Array $data) 

    {

        $keys = array();

        

        foreach($data as $row) {

            

            $keyIncrement = 

                (!isset($keys[$row[$this->_orderField]])) 

                    ? $keys[$row[$this->_orderField]] = 0

                    : ++$keys[$row[$this->_orderField]];



            $tempArray[$row[$this->_orderField].$keyIncrement] = $row;

        }



        if ($this->_orderDirection == 'DESC') {

            krsort($tempArray, SORT_NATURAL | SORT_FLAG_CASE );

        } else {

            ksort($tempArray, SORT_NATURAL | SORT_FLAG_CASE);

        }



        return $tempArray;           

            

    }

?>

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-1

bwuhlman at tallships dot ca ¶

24 years ago

Well, actually, asort has *two* annoying features.



It works perfectly well sorting hashes (or associative arrays, as you might have it), but doggedly refuses to sort regular arrays maintaining index assocation. Kind've makes sense, but the docs don't explicitly say you can't do it.



Urgggh.

down

-4

rick at toewsweb dot net ¶

13 years ago

On sorting by value first, then by key (cf., 2008-01-31 notes by mike at clear-link dot com):

What occurred to me to solve this problem was to extract the keys and values into separate arrays, then use array_multisort to get the desired order:

Ex:
<?php
$kvpairs = array('noun' => 'thought', 'animal' => 'fish', 'abstract' => 'thought', 'food' => 'fish', 'verb' => 'fish');
print "before:\n";
print_r($kvpairs);

// Essentially, one line of code is all that's needed for the sort:
array_multisort(array_values($kvpairs), array_keys($kvpairs), $kvpairs);

print "after:\n";
print_r($kvpairs);
?>

before:
Array
(
    [noun] => thought
    [animal] => fish
    [abstract] => thought
    [food] => fish
    [verb] => fish
)
after:
Array
(
    [animal] => fish
    [food] => fish
    [verb] => fish
    [abstract] => thought
    [noun] => thought
)

Of course, array_multisort allows you to specify sort order (SORT_ASC, SORT_DESC) and sort type (SORT_REGULAR, SORT_STRING, SORT_NUMERIC) for each array you pass it.

down

-1

phzzzt .a.t. acm .d.o.t. org ¶

22 years ago

Similar to above but for an array of arrays instead of an array of objects.



<?php

function aasort($x,$var,$cmp='strcasecmp'){

  if ( is_string($var) ) $var = "\'$var\'";

  uasort($x,

    create_function('$a,$b',

      'return '.$cmp.'( $a['.$var.'],$b['.$var.']);')

  );

  return $x;

}

?>

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-3

elhanafi123 at gmail dot com ¶

6 years ago

I have written this function so its sort an multidimensional array with a specific key.

<?php
function sort_array($array, $sort_value, $reverse = false){
    $value = $result = array();
    
    foreach($array as $key => $rows){
        $value[$key] = strtolower($rows[$sort_value]);
    }
    
    if($reverse == true){
        arsort($value);
    }else{
        asort($value);
    }
    
    foreach($value as $keys => $null){
        $result[] = $array[$keys];
    }
    
    return $result;
}
?>

Examples

<?php

$array = array(array('a' => 'foo'), array('a' => 'foo4'), array('a' => 'foo2'), array('a' => 'foo3'));
print_r($array);
//Array ( [0] => Array ( [a] => foo ) [1] => Array ( [a] => foo4 ) [2] => Array ( [a] => foo2 ) [3] => Array ( [a] => foo3 ) )

print_r(sort_array($array, 'a'));
//Array ( [0] => Array ( [a] => foo ) [1] => Array ( [a] => foo2 ) [2] => Array ( [a] => foo3 ) [3] => Array ( [a] => foo4 ) )

print_r(sort_array($array, 'a', true));
//Array ( [0] => Array ( [a] => foo4 ) [1] => Array ( [a] => foo3 ) [2] => Array ( [a] => foo2 ) [3] => Array ( [a] => foo ) ) 

?>

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-2

mzvarik at gmail dot com ¶

16 years ago

I noticed that my function mentioned earlier is very misleading - somebody please delete that note!

This is how you sort:
<?php
setlocale (LC_ALL, 'czech');
$array = array("a", "č", "c");
usort ($array, 'strcoll');
print_r($array);
?>

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-4

bakatamas at freemail dot hu ¶

16 years ago

Dear mike at clear-link dot com!

I needed a case insensitive version of your function. It is still not perfect as I have to do something with country specific characters (öüóőúéáűíÖÜÓŐÚÉÁŰÍ)

function akisort(&$array,$valrev=false,$keyrev=false)
    {
    if ($valrev)
        {
        arsort($array);
        }
        else
        {
        asort($array);
        };
    $vals = array_count_values($array);
    $i = 0;
    foreach ($vals AS $val=>$num)
        {
        $first = array_splice($array,0,$i);
        $tmp = array_splice($array,0,$num);
        $tmp2 = array();
        foreach($tmp as $key => $value)
            {
            $tmp2[] = $key;
            $number = $value;
            };
        natcasesort($tmp2);
        reset($tmp2);
        print_r($tmp2);
        unset($tmp);
        foreach($tmp2 as $key => $value)
            {
            $tmp[$value] = $number;
            };
        if($keyrev)
            {
            $tmp = array_reverse($tmp, true);
            };
        $array = array_merge($first,$tmp,$array);
        unset($tmp);
        $i = $i+$num;
        };
};

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