note 87884 modified in function.usort by danbrown
| From: | danbrown@php.net | Date: | Mon, 29 Dec 2008 02:07:38 +0000 |
| Subject: | note 87884 modified in function.usort by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-148628@lists.php.net to get a copy of this message | ||
<?php
/*---------------------------------------------------------
* my own home made easy object sort, which
* i cannot find anywhere on the net
* at all, tut. i can find only complicated ones,
* which brings me a headache.
*
* You can enhance it to return all sorts of error
* conditions if you wish,
* i need nothing but a false return upon failure to sort,
* so that is the only error i have here
*
* Example usage:
*
* INPUT - $objects_array
// an array of objects for sorting
* PARAMETERS - property
// the property of the object to be sorted
* OUTPUT - $engine
// an engine object created by new,
// with your arrays of objects sorted according to your
// selected property
//( the sorting is done upon sort object creation )
*
* Code Examples
*
* $engine = new objSorter($objects_array);
// sorts on FIRST property - default
* $engine = new objSorter($objects_array,'property');
// sort on ANY specific property
*--------------------------------------------------------*/
class objSorter
{
var $property;
var $sorted;
function ObjSorter($objects_array,$property=null)
{
$sample = $objects_array[0];
$vars = get_object_vars($sample);
if (isset($property))
{
if (isset($sample->$property))
// make sure requested property is correct for the object
{
$this->property = $property;
usort($objects_array, array($this,'_compare'));
}
else
{
$this->sorted = false;
return;
}
}
else
{
list($property,$var) = each($sample);
$this->property = $property;
usort($objects_array, array($this,'_compare'));
}
$this->sorted = ($objects_array);
}
function _compare($apple, $orange)
{
$property = $this->property;
if ($apple->$property == $orange->$property) return 0;
return ($apple->$property < $orange->$property) ? -1 : 1;
}
} // end class
?>
USAGE EXAMPLE
DUMP ORIGINAL
user Object ( [name] => Yunihe Jopoba [age] => 27 [richness] => â⬠899,970 )
user Object ( [name] => Janirevi Fakejorumoa [age] => 19 [richness] => ââ¬
219,078 )
user Object ( [name] => Korejowi Mezede [age] => 95 [richness] => â⬠3,272 )
user Object ( [name] => Nugoaivu Jongyi [age] => 84 [richness] => â⬠94,853 )
user Object ( [name] => Cepomase Buaesukoyua [age] => 32 [richness] => ââ¬
677,180 )
user Object ( [name] => Vejosehona Auva [age] => 20 [richness] => â⬠144,540 )
user Object ( [name] => Fewame Wojuvuzo [age] => 69 [richness] => â⬠198,231 )
user Object ( [name] => Risuku Zagedobu [age] => 48 [richness] => â⬠763,860 )
user Object ( [name] => Fazurada Aayu [age] => 16 [richness] => â⬠302,352 )
SORTED by age
<?php
$objects = new ObjSorter($objects_array,'age');
if ($objects->sorted)
{
$objects_array = $objects->sorted;
foreach ($objects_array as $key=>$object) { print_r($object); echo "<br />"; }
}
?>
user Object ( [name] => Fazurada Aayu [age] => 16 [richness] => â⬠302,352 )
user Object ( [name] => Janirevi Fakejorumoa [age] => 19 [richness] => ââ¬
219,078 )
user Object ( [name] => Vejosehona Auva [age] => 20 [richness] => â⬠144,540 )
user Object ( [name] => Yunihe Jopoba [age] => 27 [richness] => â⬠899,970 )
user Object ( [name] => Cepomase Buaesukoyua [age] => 32 [richness] => ââ¬
677,180 )
user Object ( [name] => Risuku Zagedobu [age] => 48 [richness] => â⬠763,860 )
user Object ( [name] => Fewame Wojuvuzo [age] => 69 [richness] => â⬠198,231 )
user Object ( [name] => Nugoaivu Jongyi [age] => 84 [richness] => â⬠94,853 )
user Object ( [name] => Korejowi Mezede [age] => 95 [richness] => â⬠3,272 )
SORTED by richness
<?php
$objects = new ObjSorter($objects_array,'richness');
if ($objects->sorted)
{
$objects_array = $objects->sorted;
foreach ($objects_array as $key=>$object) { print_r($object); echo "<br />"; }
}
?>
--was--
class objSorter
{
var $property;
var $sorted;
function ObjSorter($objects_array,$property=null)
{
$sample = $objects_array[0];
$vars = get_object_vars($sample);
if (isset($property))
{
if (isset($sample->$property))
// make sure requested property is correct for the object
{
$this->property = $property;
usort($objects_array, array($this,'_compare'));
}
else
{
$this->sorted = false;
return;
}
}
else
{
list($property,$var) = each($sample);
$this->property = $property;
usort($objects_array, array($this,'_compare'));
}
$this->sorted = ($objects_array);
}
function _compare($apple, $orange)
{
$property = $this->property;
if ($apple->$property == $orange->$property) return 0;
return ($apple->$property < $orange->$property) ? -1 : 1;
}
} // end class
http://php.net/manual/en/function.usort.php