functions/array.php

   1 <?
   2    /**
   3     **  array.php
   4     **
   5     **  This contains functions that work with array manipulation.  They
   6     **  will help sort, and do other types of things with arrays
   7     **
   8     **/
   9
  10    function ary_sort($ary,$col, $dir = 1){
  11       // The globals are used because USORT determines what is passed to comp2
  12       // These should be $this->col and $this->dir in a class
  13       // Would beat using globals
  14       if(!is_array($col)){
  15          $col = array("$col");
  16       }
  17       $GLOBALS["col"] = $col;  // Column or Columns as an array
  18       $GLOBALS["dir"] = $dir;  // Direction, a positive number for ascending a negative for descending
  19
  20       function comp2($a,$b,$i = 0) {
  21          global $col;
  22          global $dir;
  23          $c = count($col) -1;
  24          if ($a["$col[$i]"] == $b["$col[$i]"]){
  25             $r = 0;
  26             while($i < $c && $r == 0){
  27                $i++;
  28                $r = comp2($a,$b,$i);
  29             }
  30          } elseif($a["$col[$i]"] < $b["$col[$i]"]){
  31             $r = -1 * $dir; // Im not sure why you must * dir here, but it wont work just before the return...
  32          } else {
  33             $r = 1 * $dir;
  34          }
  35          return $r;
  36       }
  37
  38       usort($ary,comp2);
  39       return $ary;
  40    }
  41 ?>