PHP - How Do I Sort An Array By The Order Of Another Array?

Hello,

Im struggling with this, probably because of my lack of fundamental knowledge of arrays.

What i want to do is:
make an array with two keys. 'id' and 'distance'.

I want to sort the results by distance, displaying the id's...

im looking at ksort() as the solution, however i don't think im implementing it properly as i dont think i have set the array up properly!!

what i have is not good...

Code: [Select]
<?php
while ($row = mysql_fetch_array($result)) {
//get the photographers postcode and split it into 2 pieces
$p_postcode = explode(' ',$row['address_post_code']);
//get the photographers postcode and split it into 2 pieces
$u_postcode_a = explode(' ',$u_postcode);
//run the two postcodes throught the function to determin the deistance
$final_distance = return_distance($u_postcode_a[0], $p_postcode[0]);
//start the variable so we can add to it later on
$photographers_inrange = "";
//declare this variable to help with the comma spacing too EDIT LOOK TO LINE 46
//$i2 = 1;
$photographers_inrange = array();
//if the distance is smaller or equal to the distance the photographer covers
if($final_distance <= $row['cover_distance']){
//get their id
$photographers_inrange['id'] = $row['ID'].',';
$photographers_inrange['distance'] = ''.$final_distance;
//echo $photographers_inrange;
//EDIT: this method does not work when just one result is returned. now i use substr -1.
//if this isnt the last result
//if($i++ <= $i2++){
//then add a comma for the sql statement
//$photographers_inrange .= ',';
//}
}

ksort($photographers_inrange);
foreach ($photographers_inrange as $key => $val) {
    echo "togs[" . $key . "] = " . $val . "<br/>";
}
 ?>
with $photographers_inrange being where it is, i am getting alot of empty arrays. not what i want.
i just need to know how to add to the original array, and how to then sort it.

thanks for your ongoing help!!

I've got a multidimensional array that has 2 columns.  The first column is numerical (country_id), and the second column is text (country_name), which may or may not be data that will be turned into an array. 

Looks something like this:

column 1 (index 0) = 42
column 2 (index 1) = Great Britain|England

I use a while loop to create an array of these rows, then a use a foreach loop to go through index[1] of each row.  If there is a single name for a country, it is added to a new array, but if there is more than one name for a country, then both names are added to the new array. So, for example, if we had this data:

row1
column 1 (index 0) = 12
column 2 (index 1) = Algeria

row2
column 1 (index 0) = 22
column 2 (index 1) = Ethiopia

row3
column 1 (index 0) =42
column 2 (index 1) = Great Britain|England

Then the final array would look like this:

index[0] = 12  index[1] = Algeria
index[0] = 22  index[1] = Ethiopia
index[0] = 42  index[1] = Great Britain
index[0] = 42  index[1] = England

Now I would like to sort by index[1] to get the following alphabetical order:

index[0] = 12  index[1] = Algeria
index[0] = 42  index[1] = England
index[0] = 22  index[1] = Ethiopia
index[0] = 42  index[1] = Great Britain

What do I use?  I've fooled around with sort, usort, asort ... can't figure it out.

Thanks in advance.

i need some help sorting my arrays. i have a class that selects data from database, and holds it inside a class to be used multiple times. rather then executing multiple queries. i know how to sort an array. but i am sorting arrays inside an array



$data = arrray(

array(

'id'=>1,

'_name'=>'Server A',

'_date_added'=>1298207645.5424,

);

array(

'id'=>2,

'_name'=>'Server B',

'_date_added'=>1298247384.4839,

);

array(

'id'=>3,

'_name'=>'Server C',

'_date_added'=>1298218493.0493,

);
);



i want to sort my array descending by key _date_added
hope you understand...

Hi, I have an array of type array_name[roll_number][aggregate_marks]. How do I sort such array on 'aggregate_marks'? My attempts on sort, asort haven't worked.

I've tried various sort methods on this array. And seem to be failing.
Code: [Select]
Array
(
    [monkey quest] => 8
    [monkey] => 2
    [monkey sports] => 0
    [monkey go happy] => 0
    [monkey go happy 3] => 1
    [monkey joes] => 0
    [monkey games] => 2
    [monkey bread recipe] => 1
    [monkey go happy 2] => 3
    [monkey quest trailer] => 4
    [monkey quest guide] => 5
    [monkey quest nick] => 6
)

What I want to do or attempt to do rather is sort the array by the => value from highest to lowest (or maybe in reverse as well, but one thing at a time)

My last failed attempt I was trying out usort() as my concept..
Code: [Select]
function cmp($a, $b)
{
    if ($a == $b)
{
        return 0;
    }
    return ($a < $b) ? -1 : 1;
}

echo "<pre>";
print_r(usort($kw, "cmp"));
echo "</pre>";

But the only thing I am left with on the page is just 1 everything else seems to be getting lost, or I dunno whats going on. So I think I've done stumped my self. Now I'm looking for idea's assuming I am tackling this all wrong.

Hi freaks,

Got a simple one for ya, I THINK?

I have a multi-array that resembles this..
Code: [Select]
$_SESSION["book_array"] = array(0 => array("plantID" => $plantID, "botanicalName" => $botanicalName, "commonName" => $commonName, "use" => $use));

I would like to sort it by the botanicalName key of the inner array before I call the forech loop that renders the display so that after it renders the table the items will be seen alphabetically, code below..
Code: [Select]
<?php 
$bookOutput = "";
//$plant_use_array = '';
if (!isset($_SESSION["book_array"]) || count($_SESSION["book_array"]) < 1) {
    $bookOutput = '<tr><td colspan="4"><h6>Your Book is EMPTY!</h6></td></tr>';
} else {
// Start the For Each loop
$i = 0; 
    foreach ($_SESSION["book_array"] as $each_item) { 
$plantID = $each_item['plantID'];
$botanicalName = $each_item['botanicalName'];
$botanicalName = stripslashes($botanicalName);
$commonName = $each_item['commonName'];
$commonName = stripslashes($commonName);
$use = $each_item['use'];
//$x = $i + 1; 
// Dynamic table row assembly
$bookOutput .= "<tr>";
$bookOutput .= '<td><a href="plant_details.php?plantID=' . $plantID . '" id="bodyLink">' . $botanicalName . '</a></td>';
$bookOutput .= '<td>' . $commonName . '</td>';
$bookOutput .= '<td><strong>' . $use . '</strong></td>';
$bookOutput .= '<td><form action="book.php" method="post"><input name="removeBtn" type="submit" value="Remove"/><input name="index_to_remove" type="hidden" value="' . $i . '" /></form></td>';
$bookOutput .= '</tr>';
$i++; 
    } 
}
?>

Any help would be much appreciated!  Thanks in advance.

Hello all,

I have a rather large array and I need to list it's contents in an alphabetical list.

The array is built like this:

$array['query']['row']['0']['title'] = 'Bob';
$array['query']['row']['1']['title'] = 'Andy';
$array['query']['row']['2']['title'] = 'Tom';

I need to sort it so it is in alphabetical order based on the title. Is there an easy way to do this?

hi,

i'm trying to sort an array of associative arrays, based on one of the keys.

if the value of the key is a primitive, normal sorting occurs - this works fine.

if the value of the key is an array, i'd like to have it sorted by "groups"

here's an example:

Code: [Select]
<?php

$data[] = array('name' => 'h', 'list' => array(1,2));
$data[] = array('name' => 'g', 'list' => array(1));
$data[] = array('name' => 'a', 'list' => array(1,3));
$data[] = array('name' => 'f', 'list' => array(2));
$data[] = array('name' => 'e', 'list' => array(2,3));
$data[] = array('name' => 'b', 'list' => array(3));
$data[] = array('name' => 'c', 'list' => array(1,2,3,4));
$data[] = array('name' => 'd', 'list' => array(3,4));

function deep_sort($array, $sorton){

usort($array, function($a, $b) use($sorton) {

$a = $a[$sorton];
$b = $b[$sorton];

if(is_array($a) && is_array($b)){

// this bit is obviously flawed - only included for illustrative purposes
$a = implode('', $a);
$b = implode('', $b);

}

return ($a == $b) ? 0 : ($a > $b) ? 1 : -1;

});

return $array;

}

$sorted_by_name = deep_sort($data, 'name');

print '<pre>';

print_r($sorted_by_name);

print '</pre>';

$sorted_by_list = deep_sort($data, 'list');

print '<pre>';

print_r($sorted_by_list);

print '</pre>';

?>
the sorted_by_name bit is fine - but for sorted_by_list, what i want returned is all the array ordered as follows:

all those with "1" (or the lowest if none have "1") in it's list value first, then all those remaining that have the next highest ("2"), etc.

so right now, the returns for sort_by_list look like this:

Code: [Select]
Array
(
    [0] => Array
        (
            [name] => g
            [list] => Array
                (
                    [0] => 1
                )

        )

    [1] => Array
        (
            [name] => f
            [list] => Array
                (
                    [0] => 2
                )

        )

    [2] => Array
        (
            [name] => b
            [list] => Array
                (
                    [0] => 3
                )

        )

    [3] => Array
        (
            [name] => h
            [list] => Array
                (
                    [0] => 1
                    [1] => 2
                )

        )

    [4] => Array
        (
            [name] => a
            [list] => Array
                (
                    [0] => 1
                    [1] => 3
                )

        )

    [5] => Array
        (
            [name] => e
            [list] => Array
                (
                    [0] => 2
                    [1] => 3
                )

        )

    [6] => Array
        (
            [name] => d
            [list] => Array
                (
                    [0] => 3
                    [1] => 4
                )

        )

    [7] => Array
        (
            [name] => c
            [list] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => 3
                    [3] => 4
                )

        )

)whereas i'd like to get back:
Code: [Select]
Array
(
    [0] => Array
        (
            [name] => g
            [list] => Array
                (
                    [0] => 1
                )

        )

    [1] => Array
        (
            [name] => h
            [list] => Array
                (
                    [0] => 1
                    [1] => 2
                )

        )

    [2] => Array
        (
            [name] => c
            [list] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => 3
                    [3] => 4
                )

        )

    [3] => Array
        (
            [name] => a
            [list] => Array
                (
                    [0] => 1
                    [1] => 3
                )

        )

    [4] => Array
        (
            [name] => f
            [list] => Array
                (
                    [0] => 2
                )

        )

    [5] => Array
        (
            [name] => e
            [list] => Array
                (
                    [0] => 2
                    [1] => 3
                )

        )

    [6] => Array
        (
            [name] => b
            [list] => Array
                (
                    [0] => 3
                )

        )   

    [7] => Array
        (
            [name] => d
            [list] => Array
                (
                    [0] => 3
                    [1] => 4
                )

        )

)
TYIA for any suggestions

Hi, i have an issue to sort gallery photos by date. Right now its sort by Value (Name).   here is the code    index.php contains :  

<div>

	<?php foreach($categories_array as $photo_category=>$photos_array){?>
    
    	<?php 
		$category_thumbnail = $gallery_url."/layout/pixel.gif";
		if(file_exists('files/'.$photo_category.'/thumbnail.jpg')){
			$category_thumbnail = $gallery_url.'/'.$photo_category.'/thumbnail.jpg';
		}
		
		$category_url = $gallery_url.'/'.$photo_category;
		?>
        
  		<span class="category_thumbnail_span" style="width:<?php echo $settings_thumbnail_width;?>px; height:<?php echo $settings_thumbnail_height+20;?>px;">
        <a class="category_thumbnail_image" href="<?php echo $category_url;?>" style="width:<?php echo $settings_thumbnail_width;?>px; height:<?php echo $settings_thumbnail_height;?>px; background-image:url('<?php echo $gallery_url;?>/layout/lens_48x48.png');" title="<?php echo htmlentities(ucwords(str_replace('-', ' ', $photo_category)));?>">
        <img src="<?php echo $category_thumbnail;?>" width="<?php echo $settings_thumbnail_width;?>" height="<?php echo $settings_thumbnail_height;?>" alt="<?php echo htmlentities(ucwords(str_replace('-', ' ', $photo_category)));?>" />
        </a>
        <a class="category_thumbnail_title" href="<?php echo $category_url;?>" title="<?php echo htmlentities(ucwords(str_replace('-', ' ', $photo_category)));?>">
        <?php echo htmlentities(str_replace('-',' ', truncate_by_letters($photo_category, 16, '..')), ENT_QUOTES, "UTF-8");?> (<?php echo count($photos_array);?>)
        </a>
        </span>
    

	<?php } ?>

</div>

the sort function :

ksort($categories_array);

Hi guys,
I'm just working on a script to get menu items from a database, sorted by a sort column. Each item needs to be checked to see if it has a parent, then paired with the parent.

Would it be best to get all of the items at once and pair them with PHP, or get the children of each item when as a separate array?

id label link parent sort 1 Home index.php 0 10 2 About about.php 0 20 3 Contact Us contact.php 2 10

I have a multidimensional array that I want to sort by "price" then by "date".  Here is an example of the array:
Code: [Select]
$productArray   = array ( array ("Bus", "1/1/2010", 15.99),
                                        array ("Train", "2/1/2010", 14.99),
                                        array ("Car", "3/1/2010", 18.00),
                                        array ("Plane", "3/1/2010", 15.99),
                                        array ("Bike", "3/1/2010", 9.99),
                                        array ("Truck", "1/1/2010", 19.99)
);
//sort by date
function sortElement1Asc($x, $y)
{
if ( $x[1] == $y[1] )
  return 0;
        else if ( $x[1] < $y[1] )
  return -1;
        else
  return 1;
}
//sort by price
function sortElement2Asc($x, $y)
{
if ( strtotime($x[2]) == strtotime($y[2]) )
  return 0;
else if ( strtotime($x[2]) < strtotime($y[2]) )
  return -1;
else
  return 1;
}
usort($productArray, 'sortElement1Asc');
usort($productArray, 'sortElement2Asc');

Unfortunately this is just sorting by price (or whatever i sort last).

Any ideas?

Hello,

I'm making a imagegallery and when someone upload a new image that image has to appear as first picture of the gallery.
I'm using an array for the files, but how can I sort the files on date, newest first.?

<?php
$n = 0;
$pathToThumbs = "images/tekeningen/";
$dir = opendir( $pathToThumbs );
while (false !== ($fname = readdir($dir))){
      
      // strip the . and .. entries out
     if ($fname != '.' && $fname != '..'){
     $tekeningen[$n] = $fname;
    } echo $tekeningen[$n]."<br />"; 
     $n = $n +1;
}
   closedir( $dir );
?>


I found solutions with ksort and filemtime, but I don't understand them and/or they didn't work for me.

I have an array I want to define in Php and then sort it.
I am pretty new to Php and don't know the syntax or what funcs to use.

Here's the array I want:

user_email, user_name, hours_worked_per_week, total_earned

There will be about 120 users, and I want to sort them ascending alphabetically  on  user_email

Hello , i am trying to sort a 2d dimensional array by the first column(id) and i havent find anything till now

This is my code for the 2d array:

$username = $_SESSION['username'];
$c = 0;

$row=1;
$col=1;
$users_array = array();
$get_from = mysql_query("SELECT id FROM my_activity WHERE from_user='$username'");
while($fetch1 = mysql_fetch_array($get_from)){
$id[$c] = $fetch1[0];
$get_from_user = mysql_query("SELECT * FROM my_activity WHERE id='$id[$c]'");
$get_user_rows = mysql_num_rows($get_from_user);
while($guser = mysql_fetch_array($get_from_user)){
$user[$c] = $guser['to_user'];
$users_array[$id[$c]][$user[$c]]= $id[$c].".".$user[$c];
$c++;
}


}

$get_to = mysql_query("SELECT * FROM my_activity WHERE to_user='$username'");
while($fetch2 = mysql_fetch_array($get_to)){
$id[$c] = $fetch2[0];
$get_to_user = mysql_query("SELECT from_user FROM my_activity WHERE id='$id[$c]'");
while($tuser = mysql_fetch_array($get_to_user)){
$user[$c] = $tuser[0];
$users_array[$id[$c]][$user[$c]]= $id[$c].".".$user[$c];
$c++;
}


}


This is what i get if i simply loop the array to get the result:

Code: [Select]
Array
(
    [6] => Array
        (
            [checkdate] => 6.checkdate
        )

    [25] => Array
        (
            [asdsadsad] => 25.asdsadsad
        )

    [7] => Array
        (
            [webuser] => 7.webuser
        )

    [9] => Array
        (
            [newuser] => 9.newuser
        )

    [10] => Array
        (
            [bot77un] => 10.bot77un
        )
)

I am trying to sort it by the ids 6,25,7,9,10 in DESC

Hi there.

I am trying to sort values in a combo box stored in an array. The array is written in t his way. Here this is in proper sorting:


 $WeightArray = array('' => '',
    '100gOrLess' => '100g or Less',
    '101g-250g' => '101g to 250g', 
    '251g-500g' => '251g to 500g',
    '501g-1kg' => '501g to 1kg',
    '1kg-2kg' => '1kg to 2kg',
    '2kg-3kg' => '2kg to 3kg',
    '3kg-4kg' => '3kg to 4kg',
    '4kg-5kg' => '4kg to 5kg',
    '5kg-6kg' => '5kg to 6kg',
    '6kg-7kg' => '6kg to 7kg',
    '7kg-8kg' => '7kg to 8kg', 
    '8kg-9kg' => '8kg to 9kg',  
    '9kg-10kg' => '9kg to 10kg',
    '10kg-11kg' => '10kg to 11kg', 
    '11kg-12kg' => '11kg to 12kg' 
    );


Now when I call this array and put in a combo it is displayed as shown in the Screenshot. It is displaying as, 10kg, 11kg 1kg ... in the incorrect order.

I tried few sort() functions but I am not able to sort the array as shown in the screenshot attached.

Kindly let me know how I can sort the values in the Combo box.

Thank you!!