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1 | <? |
2 | /** |
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3 | ** array.php |
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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"] = $dir; // Direction, a positive number for ascending a negative for descending |
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19 | |
20 | usort($ary,comp2); |
21 | return $ary; |
22 | } |
23 | |
24 | function comp2($a,$b,$i = 0) { |
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25 | global $col; |
26 | global $dir; |
27 | $c = count($col) -1; |
28 | if ($a["$col[$i]"] == $b["$col[$i]"]){ |
29 | $r = 0; |
30 | while($i < $c && $r == 0){ |
31 | $i++; |
32 | $r = comp2($a,$b,$i); |
33 | } |
34 | } elseif($a["$col[$i]"] < $b["$col[$i]"]){ |
35 | $r = -1 * $dir; // Im not sure why you must * dir here, but it wont work just before the return... |
36 | } else { |
37 | $r = 1 * $dir; |
38 | } |
39 | return $r; |
40 | } |
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41 | ?> |