Issue with OOP Array Sorting

Question

LastMitch

11 Years Ago

Hi,

I'm having issue with understanding how this array works in OOP. I want to sort this from ABC or by 123. I'm reading about it but I don't know how to run this code. I created the array but making it work is something new to me.

//This is my Array
$cheesecake = array(1 => 'Apple CheeseCake', 2 => 'Blueberry CheeseCake', 3 => 'Strawberry CheeseCake', 4 => 'Mango CheeseCake', 5 => 'Raspberry CheeseCake');

//This is my Function that sort the array
function sortObjectByKey($object,$cheesecake =''){

 $temp = array();
 foreach($object as $key => $valve){
     $temp[$key] = '';
 }

 if($cheesecake == 'ASC'){
     sortC($temp);
 } else {
     sortCa($temp);
 }

 $tempObject = new stdClass();
 foreach($temp as $key => $valve){
     $tempObject ->$key = $object-> $key;
 }

 return $tempObject;

 }

Any Suggestions and explanation will help. I appreciate it. Thanks!

php

4 Contributors
23 Replies
351 Views
18 Hours Discussion Span
Latest Post 11 Years Ago Latest Post by LastMitch

All 23 Replies

jkon 602 Posting Whiz in Training

11 Years Ago

I can’t see any object there …. except from the stdClass that is used for typecasting to object. What exactly are you trying to do?

radow 7 Junior Poster in Training

11 Years Ago

You can to use functions uasort(), uksort or usort().

Edited 11 Years Ago by radow

diafol

11 Years Ago

Yes, like jkon, I'm a bit confused too. You're passing an array to the function, although you've called it 'object'. sortC and sortCa don't exist in php, unless you have them as user-defined functions.

http://php.net/manual/en/function.sort.php

I don't know what you're trying to do either. The first loop sets all keys to ''. Odd. The you pass this info to the 'class' loop.

If you need to get rid of keys for some reason, you can use array_values(), but this will still hold the same 'keys' just starting at 0 instead of 1. Have a look at radow's suggestions.

radow 7 Junior Poster in Training

11 Years Ago

You can will implement your method sorting and use its together with method usort.

function sortDates($a, $b)
{
    $timestamp_a = is_int($a) ? $a : strtotime($a);
    $timestamp_b = is_int($b) ? $a : strtotime($b);
    if($timestamp_a == $timestamp_b)
    {
        return 0;
    }

    return $timestamp_a < $timestamp_b ? -1 : 1;
}

$date = array(1001203200, "10 September 2010", "09/23/2001 00:00:00");

usort($date, 'sortDates');

radow 7 Junior Poster in Training

11 Years Ago

ok. method strcmp() take two parametrs strcmp().
Your method sortByName() should look like a following way

public static function sortByName(CheeseCake $c1, CheeseCake $c2)
    {
        return strcmp($c1->name, $c2->name);
    }



$cheesecake = array(new CheeseCake("Apple Cheesecake"), new CheeseCake("Strawberry Cheesecake"), new CheeseCake("Mango Cheesecake"));

usort($cheesecake, array('CheeseCake','sortByName'))

Edited 11 Years Ago by radow

LastMitch commented: Thanks for the example! +5

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LastMitch · Answer 1 · 2012-10-28T17:35:03+00:00

@jkon

I can’t see any object there …. except from the stdClass that is used for typecasting to object. What exactly are you trying to do?

Thanks for the reply & explanation. I'm trying to sort the array.

LastMitch · Answer 2 · 2012-10-28T17:36:57+00:00

@radow

You can to use functions uasort(), uksort or usort().

Thanks for the reply & example. I'm not going to used that because on the Manaul it said

Be careful when sorting arrays with mixed types values because sort() can produce unpredictable results.

LastMitch · Answer 3 · 2012-10-28T17:38:35+00:00

@diafol

Thanks for the reply & explanation!

I'm not going to used that because on the Manaul it said

Be careful when sorting arrays with mixed types values because sort() can produce unpredictable results.

LastMitch · Answer 4 · 2012-10-28T18:28:46+00:00

OK, Since I got confused with the function so I modify the code into 2 different type of sorting array .

Here is the first example I ended up using sort() function anyway:

<?php
//This is my Array
$cheesecake = array("Apple Cheesecake", "Blueberry Cheesecake", "Strawberry Cheesecake", "Mango Cheesecake", "Raspberry Cheesecake");
//This is to Sort 
sort($cheesecake);
//Foreach $key is assigned
foreach ($cheesecake as $key => $val) {

   echo $cheesecake[" .$key "]= "$val<br/>";

}

?>

When I ran the code my cheesecakes were in order:

Apple Cheesecake
Blueberry Cheesecake
Mango Cheesecake
Raspberry Cheesecake
Strawberry Cheesecake

So this works! Thanks to everyone explanation.

LastMitch · Answer 5 · 2012-10-28T18:30:50+00:00

Here is my second example:

When I ran this code, my page went blank. Any explanation why?

<?php
//This is my Array
$cheesecake = array("Apple Cheesecake", "Blueberry Cheesecake", "Strawberry Cheesecake", "Mango Cheesecake", "Raspberry Cheesecake");

class CheeseCake
{
private $name;

public function CheeseCake($name)
{
$this->name = $name;
}

public static function sortByName(CheeseCake $c1)
{
return strcmp($c1->name);
}

private $cheesecake = array();

public function addCheeseCake ($name)
{
$this->cheesecake[] = new CheeseCake($name);
}

public function display()
{
print_r($this->cheesecake);
}

}

?>

LastMitch · Answer 6 · 2012-10-28T19:09:34+00:00

@radow

I make some adjusted base on changes:

<?php

$cheesecake = array("Apple Cheesecake", "Blueberry Cheesecake", "Strawberry Cheesecake", "Mango Cheesecake", "Raspberry Cheesecake");

class CheeseCake
{
private $name;
public function CheeseCake($name)
{
$this->name = $name;
}
public static function sortByName(CheeseCake $c1, CheeseCake $c2)
{
 return strcmp($c1->name, $c2->name);
}

private $cheesecake = array();
public function addCheeseCake ($name)
{
$this->cheesecake[] = new CheeseCake($name);
}

public function display()
{
print_r($this->cheesecake);
}
}

$cheesecake = array(new CheeseCake("Apple Cheesecake"), new CheeseCake("Blueberry Cheesecake"), new CheeseCake("Strawberry Cheesecake"), new CheeseCake("Raspberry Cheesecake"), new CheeseCake("Mango Cheesecake"))

usort($cheesecake, &array("CheeseCake","sortByName"));

?>

It didn't work either. There's an error in usort

Any suggestion and explanation?

radow 7 Junior Poster in Training · Answer 7 · 2012-10-28T19:30:47+00:00

in function usort() second parameter will not should passed by reference.
what did display error?
how look like array $cheesecake after applying function usort.

LastMitch · Answer 8 · 2012-10-28T19:35:59+00:00

I got forgot to post the error:

unexpected 'usort'

It's means it something wrong here:

&array("CheeseCake","sortByName")

which I don't know how to fixed

radow 7 Junior Poster in Training · Answer 9 · 2012-10-28T19:56:15+00:00

maybe. Try cause this:

usort($cheesecake, array('CheeseCake','sortByName'))

radow 7 Junior Poster in Training · Answer 10 · 2012-10-28T20:01:59+00:00

radow 7 Junior Poster in Training

11 Years Ago

29 line does the semicolon at the end of line

LastMitch · Answer 11 · 2012-10-28T20:55:26+00:00

@radow

I will make some adjusted base on changes:

usort($cheesecake, array('CheeseCake','sortByName'))

-

29 line does the semicolon at the end of line

LastMitch · Answer 12 · 2012-10-28T20:57:21+00:00

I make some adjusted base on changes and when I ran it appear a blank page again

<?php

$cheesecake = array("Apple Cheesecake", "Blueberry Cheesecake", "Strawberry Cheesecake", "Mango Cheesecake", "Raspberry Cheesecake");

class CheeseCake
{
private $name;
public function CheeseCake($name)
{
$this->name = $name;
}
public static function sortByName(CheeseCake $c1, CheeseCake $c2)
{
 return strcmp($c1->name, $c2->name);
}

private $cheesecake = array();
public function addCheeseCake ($name)
{
$this->cheesecake[] = new CheeseCake($name);
}

public function display()
{
print_r($this->cheesecake);
}
}

$cheesecake = array(new CheeseCake("Apple Cheesecake"), new CheeseCake("Blueberry Cheesecake"), new CheeseCake("Strawberry Cheesecake"), new CheeseCake("Raspberry Cheesecake"), new CheeseCake("Mango Cheesecake"));

usort($cheesecake, array('CheeseCake','sortByName'))

?>

Any suggestion and explanation?

radow 7 Junior Poster in Training · Answer 13 · 2012-10-28T21:08:11+00:00

will add in end your script

var_dump($cheesecake);

you should will see sorted array

LastMitch · Answer 14 · 2012-10-28T21:25:22+00:00

OK I will used var_dump($cheesecake);

LastMitch · Answer 15 · 2012-10-28T21:26:38+00:00

I'm a bit surprise that var_dump() was used.

This is what it dump:

array(5) { [0]=> object(CheeseCake)#1 (2) { ["name":"CheeseCake":private]=> string(16) "Apple Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [1]=> object(CheeseCake)#2 (2) { ["name":"CheeseCake":private]=> string(20) "Blueberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [2]=> object(CheeseCake)#5 (2) { ["name":"CheeseCake":private]=> string(16) "Mango Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [3]=> object(CheeseCake)#4 (2) { ["name":"CheeseCake":private]=> string(20) "Raspberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [4]=> object(CheeseCake)#3 (2) { ["name":"CheeseCake":private]=> string(21) "Strawberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } }

This output looks weird

radow 7 Junior Poster in Training · Answer 16 · 2012-10-28T21:38:41+00:00

What is strange?
Objects in the array sorted by ABC.
What and it's necessary was to do.

LastMitch · Answer 17 · 2012-10-28T22:06:53+00:00

What is strange?
Objects in the array sorted by ABC.
What and it's necessary was to do.

When the output it should be more organized than it should be. That was the issue.

The output should look like this:

array(5) { 
[0]=> object(CheeseCake)#1 (2) { 
["name":"CheeseCake":private]=> string(16) "Apple Cheesecake"   ["cheesecake":"CheeseCake":private]=> array(0) { } } 
[1]=> object(CheeseCake)#2 (2) { 
["name":"CheeseCake":private]=> string(20) "Blueberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } 
[2]=> object(CheeseCake)#5 (2) { 
["name":"CheeseCake":private]=> string(16) "Mango Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } 
[3]=> object(CheeseCake)#4 (2) { 
["name":"CheeseCake":private]=> string(20) "Raspberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } 
[4]=> object(CheeseCake)#3 (2) { 
["name":"CheeseCake":private]=> string(21) "Strawberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } 
}

Not this:

array(5) { [0]=> object(CheeseCake)#1 (2) { ["name":"CheeseCake":private]=> string(16) "Apple Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [1]=> object(CheeseCake)#2 (2) { ["name":"CheeseCake":private]=> string(20) "Blueberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [2]=> object(CheeseCake)#5 (2) { ["name":"CheeseCake":private]=> string(16) "Mango Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [3]=> object(CheeseCake)#4 (2) { ["name":"CheeseCake":private]=> string(20) "Raspberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } [4]=> object(CheeseCake)#3 (2) { ["name":"CheeseCake":private]=> string(21) "Strawberry Cheesecake" ["cheesecake":"CheeseCake":private]=> array(0) { } } }

How do I make it organized when I used var_dump(). Usually when you dump a file it's usually not organized. Is there another way to echo it out correctly?

LastMitch · Answer 18 · 2012-10-29T00:15:24+00:00

@radow

Nevermind I figure it out! I used print_r() function instead of var dump() function plus I put <pre> tags

Thanks for being patience and helping me out with this issue. Thanks!

Here is my example:

<pre>
<?php
$cheesecake = array("Apple Cheesecake", "Blueberry Cheesecake", "Strawberry Cheesecake", "Mango Cheesecake", "Raspberry Cheesecake");

class CheeseCake
{
private $name;
public function CheeseCake($name)
{
$this->name = $name;
}
public static function sortByName(CheeseCake $c1, CheeseCake $c2)
{
 return strcmp($c1->name, $c2->name);
}

private $cheesecake = array();
public function addCheeseCake ($name)
{
$this->cheesecake[] = new CheeseCake($name);
}

public function display()
{
print_r($this->cheesecake);
}
}

$cheesecake = array(new CheeseCake("Apple Cheesecake"), new CheeseCake("Blueberry Cheesecake"), new CheeseCake("Strawberry Cheesecake"), new CheeseCake("Raspberry Cheesecake"), new CheeseCake("Mango Cheesecake"));

usort($cheesecake, array('CheeseCake','sortByName'));

print_r($cheesecake)
?>
</pre>

Here is my output which I want it to appear as:

Array
(
    [0] => CheeseCake Object
        (
            [name:CheeseCake:private] => Apple Cheesecake
            [cheesecake:CheeseCake:private] => Array
                (
                )

        )

    [1] => CheeseCake Object
        (
            [name:CheeseCake:private] => Blueberry Cheesecake
            [cheesecake:CheeseCake:private] => Array
                (
                )

        )

    [2] => CheeseCake Object
        (
            [name:CheeseCake:private] => Mango Cheesecake
            [cheesecake:CheeseCake:private] => Array
                (
                )

        )

    [3] => CheeseCake Object
        (
            [name:CheeseCake:private] => Raspberry Cheesecake
            [cheesecake:CheeseCake:private] => Array
                (
                )

        )

    [4] => CheeseCake Object
        (
            [name:CheeseCake:private] => Strawberry Cheesecake
            [cheesecake:CheeseCake:private] => Array
                (
                )
        )
    )

Issue with OOP Array Sorting

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