I am adding elements to multidimensional array like this
foreach($results as $res){
$fwidth=$res[0];
$fpath=$res[1];
$sub = array (
'img_w' => $fwidth,
'img_path' => $fpath,
);
$widths[] = $sub;
}
And i want to sort $widths array by 'img_w' from bigger to smaller (DESC).
Can anyone help me? Thanks in advance.
Use PHP's USort() function (user sort), which takes two arguments. The first is the array you want to sort. The second is a function that does the actual sorting (you write it yourself). The page I linked to has some examples that should cover your case.
Related
I have an array as follows:
$aq=['jonathan','paul','andy','rachel'];
Then I have an array as follows:
$bq=['rachel','andy','jonathan'];
What I need is to use the ordering of the first array to sort my second array.
So for this instance, the resulting sorted array should be:
$cq=['jonathan','andy','rachel'];
I started working on a solution that uses the highest key as the top value (the head of the array) because what Im looking for is the top value but that ran into issues and seemed more like a hack so i think sorting is what im looking for.
Is there a simple function in php that can sort my data based on my first array and there respective positions in the array
please try this short and clean solution using array_intersect:
$aq = ['jonathan','paul','andy','rachel'];
$bq = ['rachel','andy','jonathan'];
$cq = array_intersect($aq, $bq);
var_export($cq);
the output will be :
array ( 0 => 'jonathan', 2 => 'andy', 3 => 'rachel', )
You'll have to use a custom sort function. Here we grab the keys of corresponding entries in the "ordering" array and use them to order the working array.
In this example, we give up (return 0) if the key doesn't exist in the ordering array; you may wish to customize that behavior, but this should give you the general idea.
$order = ['jonathan','paul','andy','rachel'];
$arrayToSort =['rachel','andy','jonathan'];
usort($arrayToSort,function($a,$b) use ($order){
if( ! array_key_exists($a,$order) ) return 0;
if( ! array_key_exists($b,$order) ) return 0;
if( array_search($a,$order) > array_search($b,$order)
return 1;
return -1;
});
I have a simple question:
Query returns array in which I would like to change order of elements in PHP.
I have an array like this:
$typesSumAr = array( 'break', 'private absence', 'sick leave', 'vacation', 'work', 'work absence' );
I would like to have an array in this order:
$typesSumAr = array( 'work', 'break', 'sick leave', 'vacation', 'private absence', 'work absence' );
The are not always all elements in array, it could be only two for example, so I cannot hardcode the array. Do I need to make if statemenets to find out if key exists and then order it manually?
Thank you for your answer.
Seeing as you have an array in the order you prefer, your problem boils down to keeping the elements that are also present in another array. PHP has a function for exactly that: array_intersect
array_intersect returns an array containing all the values of its first array argument that are present in all the arguments. Note that keys are preserved.
There are lots of great array sorting function depending on how you want to sort it. Have a look here http://www.php.net/manual/en/array.sorting.php or even based on your own function via uksort (http://www.php.net/manual/en/function.uksort.php)
I am seeking for someone's knowledge out here.
Right now, I would need to merge several arrays into a bigger one, but all of those arrays depend on a function.
This function returns a numeric array containing different quantities of numbers between 1 and 7 :
function Possible($i, $j, $grid)
$possible = Possible($i, $j, $grid)
I'm working with a grid, and the function returns a different array for every case of the grid. What I would like to do is to merge those 7 arrays into another one. Some numbers may be present more than once in this big array, but I want it this way.
I tried using for loops, while loops and some other techniques, but nothing worked. In this case, it is not possible to manually define every array, since they change depending of what is contained in the grid and there are too many. It has to be done automatically, and this is where I get stuck.
for ($jj=0; $j<7; $j++){
$possRow = array_merge( ###what do I add here or what do I change in this code to make everything work###
Thank you if someone can help me out!
Etpi
hope this help:
$biggerOneArray = array();
for($k=0;$k<7;$k++) {
$biggerOneArray[] = Possible($i,$j,$grid);
}
Then you can check your bigger array, may contains all arrays of the iterations of the loop (7 arrays merged).
var_dump($biggerOneArray);
The output should be this:
array(
(int) 0 => array(
'key' => 'value',
'key2' => 'value2'
),
(int) 1 => array(
'key3' => 'value3',
'key4' => 'value4'
)
)
etc...
I'm sorry but your description isn't very clear. But just to get you started you might look at this solution.
function Possible($i, $j, $grid) {
// some code ... e.g. $array[] = "some data";
return $array;
}
By creating a small array for each grid and returning it using return $array you get a few little arrays which you can inturn place into a for loop to merge it into one larger array. However i believe the var $jj must have some meaning in the function it self as well.
for($jj=0;$jj<7;$jj++) {
$merged_array[$jj] = Possible($i,$j,$grid);
}
Maybe if you descripe your problem a little more and post an exmple of the array's your working with i can give you a better answer.
I am using Cassandra and I have saved some byte representations as ID. Everything is working fine, however that data (id) is no good for output.
$users = $db->get('1');
echo '<pre>';
print_r($users);
die();
Outputs
Array
(
[��� X��W��c_ ] => Array
(
[id] => ��� X��W��c_
[name] => steve
[surname] => moss
)
[�*B�X��y�~p��~] => Array
(
[id] => �*B�X��y�~p��~
[name] => john
[surname] => doe
)
)
As you can see ID's are some wierd characters, it's because they are byte representations in database. They actually look like \xf5*B\xa0X\x00\x11\xe1\x99y\xbf~p\xbc\xd1~.
In PHPCASSA there is function CassandraUtil::import(); to which I can pass these bytes and it will return guid. It works fine, but I want my array to automatically converted from bytes to guids.
Only option I find is looping through every item in array and assigning new value to it. Somehow I think that it is not the best approach. Is there any other ways to do this?
TL;DR
Have array with bytes like above, need to use CassandraUtil::import(); on array keys and id's to get readable id's. What is the most effective way of doing so.
UPDATE
Sorry, only saw the top level array key, I think you would have to run the function below as well as another one after:
function cassImportWalkRecur(&$item, $key)
{
if ($key == 'id')
$item = CassandraUtil::import();
}
$array = array_walk_recursive($array, 'cassImportWalkRecur');
That should apply it to the ID fields. If you need to check the data first, there maybe a way to detect the encoding, but I am not sure how to do that.
You should be able to create a function and use array_walk to traverse the array and update the keys. Something like:
function cassImportWalk($item, &$key)
{
$key = CassandraUtil::import();
}
$array = array_walk($array, 'cassImportWalk');
Untested (also you may have to change the CassandraUtil usage), but should work.
Unless I am misunderstanding the question this can be done simply and cleanly like so:
$users = $db->get('1');
$keys = array_keys($users);
$readableKeys = array_map("CassandraUtil::import",$keys);
foreach($users as $currentKey => $subArray) {
$readableKey = array_shift($readableKeys);
$subArray['id'] = $readableKey;
$users[$readableKey] = $subArray;
unset($users[$currentKey]);
}
Would array_flip() all keys and values, then array_walk() and apply my function, before doing a final array_flip().
Hello whew im stack in this problem.... arranging value from highest to lowest in json data values
pastebin - http://pastebin.com/yjFUfdJW for the codes
whew i just want to sort the likes highest to lowest... whew anyone has a solution for it? :) pleas help.. :)
Use one of PHP's sort functions for array sorting on the array-value of your JSON?
In order to sort your associative array and maintain the correlation between array elements, you need to use asort().
...
$like[] = array(
'uid' => $uid[$i],
'likes' => $datacount
);
foreach($like as $userlikes)
{
// Sort array numerically
asort($userlikes, SORT_NUMERIC);
}
...