PHP Nested foreach with Key

PHP Nested foreach with Key - php

Assuming this is one big array and its called $data you can nest a couple of foreach loops.
I use foreach loops as I assume there are cases where this data structure get more complex than the one you show
foreach ( $data['Itineraries'] as $itin ) {
foreach ( $data['Legs'] as $legs) {
if ($legs['Id'] == $itin['OutboundLegId']) {
// we matched the itinerary with a leg
echo $legs['OutboundLegId'] . ' ' . $legs['FlightNumbers'][0]['FlightNumber'];
}
}
}

Use it as draft. Can't perform function without feedback.
Put proper arrays instead of {YOUR-ARRAY-WITH-LEGS} and {YOUR-ARRAY-WITH-ITINERARIES}
$sortedLegs = array_column('Id', {YOUR-ARRAY-WITH-LEGS});
$joinedArray = array_map(function($itinerary) use($sortedLegs){
if(array_key_exists($itinerary['OutboundLegId'],$sortedLegs)) {
$itinerary['legs'] = $sortedLegs[$itinerary['OutboundLegId']];
}
return $itinerary;
},{YOUR-ARRAY-WITH-ITINERARIES});

Related

merging array in CI 3

I want to merge two arrays in order to get the data as per my requirement.
I am posting my result, please have a look.
First array:
Array
(
[0] => Array
(
[km_range] => 300
[id] => 2
[car_id] => 14782
)
[1] => Array
(
[km_range] => 100
[id] => 3
[car_id] => 14781
)
[2] => Array
(
[km_range] => 300
[id] => 4
[car_id] => 14783
)
)
Second array:
Array
(
[0] => Array
(
[user_id] => 9c2e00508cb28eeb1023ef774b122e86
[car_id] => 14783
[status] => favourite
)
)
I want to merge the second array into the first one, where the value at key car_id matches the equivalent value; otherwise it will return that field as null.
Required output:
<pre>Array
(
[0] => Array
(
[km_range] => 300
[id] => 2
[car_id] => 14782
)
[1] => Array
(
[km_range] => 100
[id] => 3
[car_id] => 14781
)
[2] => Array
(
[km_range] => 300
[id] => 4
[car_id] => 14783
[fav_status] => favourite
)
)

Since the merge is so specific I would try something like this:
foreach ($array1 as $index => $a1):
foreach ($array2 as $a2):
if ($a1['car_id'] == $a2['car_id']):
if ($a2['status'] == "favourite"):
$array1[$index]['fav_status'] = "favourite";
endif;
endif;
endforeach;
endforeach;
You might be able to optimize the code more but this should be very easy to follow...

Another way to achieve this without using the index syntax is to reference the array elements in the foreach by-reference by prepending the ampersand operator:
foreach($firstArray as &$nestedArray1) {
foreach($secondArray as $nestedArray2) {
if ($nestedArray1['car_id'] == $nestedArray2['car_id']) {
$nestedArray1['fav_status'] = $nestedArray2['status'];
}
}
}
You can see it in action in this Playground example.
Technically you asked about merging the arrays. While the keys would be different between the input arrays and the desired output (i.e. "status" vs "fav_status"), array_merge() can be used to merge the arrays.
if ($nestedArray1['car_id'] == $nestedArray2['car_id']) {
$nestedArray1 = array_merge($nestedArray1, $nestedArray2);
}
Playground example.
Additionally the union operators (i.e. +, +=) can be used.
If you want to append array elements from the second array to the first array while not overwriting the elements from the first array and not re-indexing, use the + array union operator1
if ($nestedArray1['car_id'] == $nestedArray2['car_id']) {
$nestedArray1 += nestedArray1;
}
Playground example.
1http://php.net/manual/en/function.array-merge.php#example-5587

echo a multidimensional array into multiple html table rows

I have a query that I'm running and it will output an unknown number of results. I want to display these results in a table of 5 columns. So I need the array print until the sixth result and then start a new row.
The way I tried to do it was to take the original array and chunk it into blocks of 5.
$display=array_chunk($row_Classrooms,5);
which gives me an array like this.
Array (
[0] => Array (
[0] => Array (
[id_room] => 1
[Name] => Classroom 1
[class] => Yes
)
[1] => Array (
[id_room] => 5
[Name] => Classroom 2
[class] => Yes
)
[2] => Array (
[id_room] => 6
[Name] => Classroom 3
[class] => Yes
)
[3] => Array (
[id_room] => 7
[Name] => Classroom 4
[class] => Yes
)
[4] => Array (
[id_room] => 8
[Name] => Classroom 5
[class] => Yes
)
)
[1] => Array (
[0] => Array (
[id_room] => 9
[Name] => Classroom 6
[class] => Yes
)
)
)
I'm then trying to echo this out with a pair of while loops, like such.
while ($rows = $display) {
echo '<tr>';
while ($class = $rows) {
echo'<td>'.$class['name'].'<br>
<input name="check'.$i.' type="checkbox" value="'.$class['id_room'].'></td>';
$i++;
}
echo '</tr>';
}
When I run this it apparently gets stuck in a never ending loop because nothing gets displayed but the browser just keeps chewing up more and more memory :)

The while statements are wrong. Have a look at here - in your while-statement you are always assigning the complete $display - not one entry.
You could try using while(($rows = array_shift($display)) !== false) - that will always get the first array item until there are no more items.
The same case in the second while-statement.

I ended up replacing the while loops with foreach loops instead which solved the issue.
foreach ($display as $rows) {
echo '<tr class="popup">';
foreach($rows as $class) {
if(isset($row_Rego)){
$exist=NULL;
$exist=array_search($class['id_room'], array_column($row_Rego, 'id_room'));
}

Iterate through multidimensional PHP array and output values

I'm having a real headache trying to iterate through an array and output elements. Using the array structure below I want to be able to output each instance of partname.
The following loop outputs the first instance of partname. I can't seem to adapt it to loop through all instances within the array. I'm sure I'm missing something basic.
foreach($ItemsArray['assignments'] as $item) {
$partname = $item['grades'][0]['partname'];
}
Array
(
[assignments] => Array
(
[0] => Array
(
[assigntmentid] => 5101
[grades] => Array
(
[0] => Array
(
[id] => 5101
[name] => Advanced AutoCad
[partid] => 6601
[partname] => Draft
[userid] => 82069
[grade] => 53
[courseid] => 6265
[fullname] => Computer Aided Design
)
)
)
[1] => Array
(
[assigntmentid] => 5101
[grades] => Array
(
[0] => Array
(
[id] => 5101
[name] => Advanced AutoCad
[partid] => 6602
[partname] => Final
[userid] => 82069
[grade] => 35
[courseid] => 6265
[fullname] => Computer Aided Design
)
)
)
)
)

Instead of just coding by slapping the keyboard. Write down what your function needs to do. In english (or whatever language you prefer). This would be something like:
Foreach assignment, loop over all grades and store the partname of
that grade into an array.
And then code it:
function getPartnames($assignments) {
$partNames = array();
foreach ($assignments as $assignment) {
foreach($assignment['grades'] as $grade) {
$partNames[] = $grade['partname'];
}
}
return $partNames;
}
So what did I do? I simply translated english to code.
Some few more tips: Use variables names that make sense. $item; $ItemArray; ... don't make sense. They tell me nothing

use an extra foreach in your loop:
foreach($ItemsArray['assignments'] as $item) {
foreach($item['grades'] as $grade) {
echo $grade['partname'];
}
}

Ordering Array by value

I'm pulling in a list of my vimeo albums using the Vimeo API and the looping three times through the array to get to the albums. It works fine.
My question is, I'm isolating the date, so how can I create a new array and sort it by the date?
While where at it, is there a way to jump to the third level of a multi-dimensional array?
$albums=$vimeo->call('vimeo.albums.getAll', array('user_id' => $myUserId));
$albums_array=object_2_array($albums);
foreach($albums_array as $album_array_two){
foreach($album_array_two as $album_array_three){
foreach($album_array_threeas $album){
if(stristr($album['title'],'conference')){
$title=$album['title'];
$description=$album['description'];
$date=stristr($album['description'],'.',true);
$year_comma=stristr($date,',');
$year=ereg_replace("[^0-9]", "", $year_comma);
$url_title='http://www.psfk.com/events/'.str_replace( " ", "-", strtolower($title));
$url=''.$title.'';
$thumb=$album['thumbnail_video']['thumbnails']['thumbnail'][1]['_content'];
echo '<li class="album">';
echo '<img src="'.$thumb.'" alt="'.$title.'" />';
echo '<div class="info">';
echo '<h2>'.$url.'</h2>';
echo $description.'<br />';
echo 'View...';
echo '</div></li>';
}
}
}
}
Sample of the array returning one item:
Array (
[generated_in] => 0.0828
[stat] => ok
[albums] => Array (
[on_this_page] => 7
[page] => 1
[perpage] => 50
[total] => 7
[album] => Array (
[0] => Array (
[id] => 1690236
[title] => Interviews
[description] =>
[created_on] => 2011-09-10 21:43:49
[total_videos] => 1
[url] => Array (
[0] => http://vimeo.com/album/1690236
)
[video_sort_method] =>
[thumbnail_video] => Array (
[id] => 28825158
[owner] => 718882
[title] => Where Inspiration Comes From [thumbnails] => Array (
[thumbnail] => Array (
[0] => Array (
[height] => 75
[width] => 100
[_content] => http://b.vimeocdn.com/ts/192/593/192593029_100.jpg
)
)
)
)
)
)
)
)

In order to sort by date, you can use the php_function array_multisort(). There is a good example on that page that I think shows what you need. I'll try to provide a better example using your data. Suppose after looping through your albums you end up with an array $myAlbums that looks like this:
Array (
[0] => Array(
[title] => My Title
[description] => some description
[date] 01-05-2011
)
[1] => Array(
.......
)
In order to sort this by date, you could do the following (taken from the example on the php page)
<?php
// Obtain a list of columns
foreach ($myAlbums as $key => $row) {
$date[$key] = $row['date'];
}
// Sort the data with volume descending, edition ascending
// Add $myAlbums as the last parameter, to sort by the common key
array_multisort($date, SORT_DESC, $myAlbums);
?>
Then you can print_r($myAlbums); and you should see that it is sorted. You might have to change the SORT_DESC flag depending on what formate your dates are in. I can't really explain HOW this works, because I'm still trying to figure it out myself... but I think it is what you need.

foreach loops & stdclass objects

I've seen similar questions on here but I can't seem to apply the solutions to my problem. I have a variable called $results which I got from an API. I'll change the proper nouns so as to protect my work's customers:
stdClass Object
(
[out] => stdClass Object
(
[count] => 2
[transactions] => stdClass Object
(
[RealTimeCommissionDataV2] => Array
(
[0] => stdClass Object
(
[adId] => 12345678
[advertiserId] => 123456789
[advertiserName] => Chuck E. Cheese, inc.
[commissionAmount] => 50
[country] => US
[details] => stdClass Object
(
)
[eventDate] => 2009-11-16T09:44:25-08:00
[orderId] => X-XXXXXXXXXX
[saleAmount] => 0
[sid] => 123456789
[websiteId] => 2211944
)
[1] => stdClass Object
(
[adId] => 987654321
[advertiserId] => 12345
[advertiserName] => Chorizon Wireless.
[commissionAmount] => 50
[country] => US
[details] => stdClass Object
(
)
[eventDate] => 2009-11-16T09:58:40-08:00
[orderId] => X-CXXXXXX
[saleAmount] => 0
[sid] => 61-122112
[websiteId] => 1111922
)
)
)
)
)
I shortened it to two entries here but the number of entries will vary, it's the result of a check for transactions in the past hour, there may sometimes be only one and sometimes as many as a dozen.
I want to assign these entries to variables like websiteId1 websiteId2 etc. I know I need to do a foreach loop but can't seem to figure it out. How can I write it so that I get the "[details]" as well?

foreach ($results->out->transactions->RealTimeCommissionDataV2 AS $commissionData) {
// you can access the commissionData objects now, i.e.:
$commissionData->adId;
$commissionData->details;
}

<?
foreach ($result->out->transactions->RealTimeCommissionDataV2 as $item)
{
// do somthing with each item.
print_r($item);
// or the details array
$num_details = sizeof($item->details)
}

I think this is what you want.
EDIT
Updated based on some notes in the documentation. Specifically, these two
a numerically indexed array will not
produce results unless you use
EXTR_PREFIX_ALL or
EXTR_PREFIX_INVALID.
Prefixes are automatically separated
from the array key by an underscore
character.
echo extract( $results->out->transactions->RealTimeCommissionDataV2, EXTR_PREFIX_ALL, 'websiteId' );
// test the extract
print_r( $websiteId_0 );

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PHP Nested foreach with Key - php

Related

merging array in CI 3

echo a multidimensional array into multiple html table rows

Iterate through multidimensional PHP array and output values

Ordering Array by value

foreach loops & stdclass objects

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