PHP/Data Structure/arsort

arsort() function maintains the original index association and sorts the elements in reverse order.

   <source lang="html4strict">

Its syntax is: void arsort (array array) <?

   $cities = array ("A" => "a",
           "I" => "i",
           "A" => "z",
           "F" => "f",
           "C" => "c");
   arsort($cities);
   for (reset ($cities); $key = key ($cities); next ($cities)) :
        print "cities[$key] = $cities[$key] 
";
   endfor;

?>

 </source>
   
  

arsort( ) function reverse sorts it by its values while preserving the keys

   <source lang="html4strict">

//bool arsort ( array &arr [, int options] ) <?

   $capitalcities["England"] = "London";
   $capitalcities["Wales"] = "Cardiff";
   $capitalcities["Scotland"] = "Edinburgh";
   arsort($capitalcities);

?>

 </source>
   
  

Reversing an Array Using arsort()

   <source lang="html4strict">

<?php

   $dogs = array("A" => "C", "B" => "D", "X" => "Z", "Q" => "T"); 
   arsort($dogs); 

printf("

%s

\n", var_export($dogs, TRUE));

?>

 </source>
   
  

Sorting with arsort()

   <source lang="html4strict">

<? $meal = array("breakfast" => "A",

             "lunch" => "B",
             "snack" => "C",
             "dinner" => "D");

print "Before Sorting:\n"; foreach ($meal as $key => $value) {

   print "   \$meal: $key $value\n";

} arsort($meal); print "After Sorting:\n"; foreach ($meal as $key => $value) {

   print "   \$meal: $key $value\n";

} ?>

 </source>