Can't push all array items into a second array PHP - php

So I have an array ($items) which has about 900 items in it. What I'm trying to do is, for the items that are read ($key["status"] == 1) which is about 300 items -> push those into a second array ($lifeSpanArray) with two attributes (added_date and read_date).
For some reason, when I try to push items into the lifespan array, I only have one item. Like I said, there are around 300 items that are status read - and I can dump those out, so I believe I am making a mistake with building my lifeSpanArray and pushing into it.
Any help much appreciated!
$items = $pocket->retrieve($params, $accessToken);
$numberArticles = count($items["list"]);
$hasRead = 0;
$hasNotRead = 0;
$readDatesArray = array();
$lifeSpanArray = array();
foreach ($items['list'] as $key) {
if ($key["status"] == 1) {
$hasRead++;
$timeAdded = date('m/d/Y', $key["time_added"]);
$dateRead = date('m/d/Y', $key["time_read"]);
// Where the problem is - only one item added
$lifeSpanArray['timeAdded'] = $timeAdded;
$lifeSpanArray['timeRead'] = $dateRead;
//Push into the read dates array
array_push($readDatesArray, $dateRead);
}
else {
$hasNotRead++;
}
}
var_dump($lifeSpanArray);

As you are overwriting your $lifeSpanArray array on each iteration you're must be getting only last entry so what you need is a two-dimension array,
Change this,
//Push into lifespan array
$lifeSpanArray['timeAdded'] = $timeAdded;
$lifeSpanArray['timeRead'] = $dateRead;
to,
$lifeSpanArray[] = array('timeAdded' => $timeAdded,'timeRead' => $dateRead);

$lifeSpanArray['timeAdded'] = $timeAdded;
$lifeSpanArray['timeRead'] = $dateRead;
For the above code, you are actually assigning a scalar value to $lifeSpanArray['timeAdded'] and $lifeSpanArray['timeRead'].
To treat them as array and push values to them, you should first initialize timeAdded and timeRead as arrays first:
$lifeSpanArray = array(
'timeAdded' => array(),
'timeRead' => array()
);
And pushing values to them within the foreach loop:
$lifeSpanArray['timeAdded'][] = $timeAdded;
$lifeSpanArray['timeRead'][] = $dateRead;

Related

Looking for an element in an array in PHP

I don't know if I'm managing this array in the best way.
The array I have is this:
$bass = $_POST['bass'];
$selected_scale = $_POST['scale'];
$major_scales = array
(
array("C","D","E","F","G","A","B","C","D","E","F","G","A","B",),
array("C#","D#","E#","F#","G#","A#","B#","C#","D#","E#","F#","G#","A#","B#",),
array("Db","Eb","F","Gb","Ab","Bb","C","Db","Eb","F","Gb","Ab","Bb","C",),
array("D","E","F#","G","A","B","C#","D","E","F#","G","A","B","C#"),
array("D#","E#","F##","G#","A#","B#","C##","D#","E#","F##","G#","A#","B#","C##"),
array("Eb","F","G","Ab","Bb","C","D","Eb","F","G","Ab","Bb","C","D"),
array("E","F#","G#","A","B","C#","D#","E","F#","G#","A","B","C#","D#"),
array("E#","F##","G##","A#","B#","C##","D##","E#","F##","G##","A#","B#","C##","D##"),
array("Fb","Gb","Ab","Bbb","Cb","Db","Eb","Fb","Gb","Ab","Bbb","Cb","Db","Eb"),
array("F","G","A","Bb","C","D","E","F","G","A","Bb","C","D","E"),
array("F#","G#","A#","B","C#","D#","E#","F#","G#","A#","B","C#","D#","E#"),
array("Gb","Ab","Bb","Cb","Db","Eb","F","Gb","Ab","Bb","Cb","Db","Eb","F"),
array("G","A","B","C","D","E","F#","G","A","B","C","D","E","F#"),
array("G#","A#","B#","C#","D#","E#","F##","G#","A#","B#","C#","D#","E#","F##"),
array("Ab","Bb","C","Db","Eb","F","G","Ab","Bb","C","Db","Eb","F","G"),
array("A","B","C#","D","E","F#","G#","A","B","C#","D","E","F#","G#"),
array("A#","B#","C##","D#","E#","F##","G##","A#","B#","C##","D#","E#","F##","G##"),
array("Bb","C","D","Eb","F","G","A","Bb","C","D","Eb","F","G","A"),
array("B","C#","D#","E","F#","G#","A#","B","C#","D#","E","F#","G#","A#"),
array("B#","C##","D##","E#","F##","G##","A##","B#","C##","D##","E#","F##","G##","A##"),
array("Cb","Db","Eb","Fb","Gb","Ab","Bb","Cb","Db","Eb","Fb","Gb","Ab","Bb")
);
$bass is a string, like the one inside the arrays. The $selected_scale is just a number.
What I'm trying to do is to find the $bass in one of those array in the position of $selected_scale. Basically, $bass = $major_scales[$selected_scale]. Therefore I want to create a loop in order to get the elements after that.
But I don't know how to manage in this case the situation. I've looked everything in internet and try various solutions without success. I'd like to know how can I do it. Thanks
Try to use next loop:
// if value exists in mentioned index
if (in_array($bass,$major_scales[$selected_scale])){
// index of that value in that array
$tmp_ind = array_search($bass,$major_scales[$selected_scale]);
// length of the array
$len = count($major_scales[$selected_scale]);
// store values after this value
$res = [];
for ($i=$tmp_ind;$i<$len;$i++){
$res[$i] = $major_scales[$selected_scale][$i];
}
}
print_r($res);
Demo1
If you need to find value by index $selected_scale in one of these arrays and also store values after this position:
foreach($major_scales as $ar){
if ($ar[$selected_scale] == $bass){
// length of the array
$len = count($ar);
// store values after this value
$res = [];
for ($i=$selected_scale;$i<$len;$i++){
$res[$i] = $ar[$i];
}
}
}
print_r($res);
Demo2

PHP build json from a dynamic number of arrays

I have a dynamic number of pages in my web project. It depends on data from the database. I may have 1 page or 10 pages. I put the data selected on each page in session, and finally want to build an array. At the moment I am building JSON from 4 arrays. (In session all the keys are level + int in ascending order. If session x is missing I don't have any data on 6+ levels)
$level1 = array();
$level2 = array();
$level3 = array();
$level4 = array();
if (isset($_SESSION['level1'])) {
$level1 = $_SESSION['level1'];
}
//the same for 3 more levels in session
$array = array(
"first" => ($level1),
"second" => ($level2),
"third" => ($level3),
"fourth" => ($level4)
);
json_encode($array);
Example of output of the json_encode($array):
{"first":["1","2"],"second":["4","6","8","9"],"third":["13","14","17","18"],"fourth":["33","34","35","36"]}
I tried to check how would json_encode work with array_push(), but I get an array of JSON objects instead of a single json object.
$result = array();
array_push($result, ["key1" => $_SESSION["level1"]]);
array_push($result, ["key2" => $_SESSION["level2"]]);
array_push($result, ["key3" => $_SESSION["level3"]]);
echo json_encode($result);
and the output:
[{"key1":["1","2"]},{"key2":["4","5","6"]},{"key3":["13","14","15"]}]
I will make everything iteratively, but I want to know if it is possible to make a single JSON object instead of array of JSONs. Thanks!
You can just add the keys to the array without any need for a function.
$result = array();
$result["key1"] = $_SESSION["level1"];
$result["key2"] = $_SESSION["level2"];
$result["key3"] = $_SESSION["level3"];
echo json_encode($result);

Flatten RecursiveIteratorIterator array by children

I can't seem to figure out the best way to do this. I have a RecursiveIteratorIterator.
$info = new RecursiveIteratorIterator(
new GroupIterator($X), # This is a class that implements RecursiveIterator
RecursiveIteratorIterator::SELF_FIRST
);
Note: GroupIterator is a class that handles our custom formatted data
When I loop through it, I get exactly what I expect.
foreach($info as $data){
echo $info->getDepth().'-'.$data."\n";
}
The output is:
0-a
1-b
2-c
2-d
1-e
2-f
0-g
1-h
2-i
This is correct, so far. Now, what I want is to flatten the parents and children into a single array. I want one row for each max-depth child. The output I am trying to get is:
0-a 1-b 2-c
0-a 1-b 2-d
0-a 1-e 2-f
0-g 1-h 2-i
I can't figure out how to do this. Each iteration over the loop gives me another row, how can I combine the rows together that I want?
I managed to figure it out. #ComFreek pointed me in the right direction. Instead of using a counter, I used the current depth to check when I hit the lowest child, then I added the data to the final array, otherwise I added it to a temp array.
$finalArray = array();
$maxDepth = 2;
foreach($info as $data){
$currentDepth = $info->getDepth();
// Reset values for next parent
if($currentDepth === 0){
$currentRow = array();
}
// Add values for this depth
$currentRow[$currentDepth] = $data;
// When at lowest child, add to final array
if($currentDepth === $maxDepth){
$finalArray[] = $currentRow;
}
}
Try adding a counter variable:
// rowNr loops through 0, 1, 2
$rowNr = 0;
$curData = [];
$outputData = [];
foreach($info as $data){
// got last element, add the temp data to the actual array
// and reset temp array and counter
if ($rowNr == 2) {
$outputData[] = $curData;
$curData = [];
$rowNr == 0;
}
else {
// save temp data
$curData[] = $info->getDepth() . '-' . $data;
}
$rowNr++;
}

Assign values to an associated array in a loop

I am having a difficult time creating an associated array and assigning a value to the key. I have two arrays (tech_pay and tech_scans) and I am doing a simple calculation using their values and I want to create a new array called tech_per_scan but I keep getting an array with the key automatically created starting at 0.
$tech_per_scan = array();
foreach($tech_pay as $key=>$value)
{
$pay_per_scan = $tech_pay[$key]['tot_pay']/$tech_scans[$key]['scans'];//calculate the payment per scan
$tech_per_scan[] = array('id'=>$key,'pay_per_scan'=>$pay_per_scan);
}
This line $tech_per_scan[] = array('id'=>$key,'pay_per_scan'=>$pay_per_scan); will add an element to you array and it will start with 0 as its index, because you did not specify its key. Similar to array_push
It should be $tech_per_scan[$id]
$tech_per_scan[$id] = $pay_per_scan;
you should set value for new array like this :
$tech_per_scan[$key] = $pay_per_scan ;
Full code is :
$tech_per_scan = array();
foreach($tech_pay as $key=>$value)
{
$pay_per_scan = $tech_pay[$key]['tot_pay']/$tech_scans[$key]['scans'];//calculate the payment per scan
$tech_per_scan[$key] = $pay_per_scan ;
}

shift array without indexOfOutBounds

I have 2 array's with the same length. array $gPositionStudents and array $gPositionInternships. Each student is assigned to a different internship, That part works.
Now I want the first element (index 0) of $gPositionStudent refer to the second (index 1) element of array $gPositionInternship. That implicitly means that the last element of $gPositionStudents refer to the first element of $gPositionInternship. (I included a picture of my explanation).
My Code is:
// Make table
$header = array();
$header[] = array('data' => 'UGentID');
$header[] = array('data' => 'Internships');
// this big array will contains all rows
// global variables.
global $gStartPositionStudents;
global $gStartPositionInternships;
//var_dump($gStartPositionInternships);
$rows = array();
$i = 0;
foreach($gStartPositionStudents as $value) {
foreach($gStartPositionInternships as $value2) {
// each loop will add a row here.
$row = array();
// build the row
$row[] = array('data' => $value[0]['value']);
//if($value[0] != 0 || $value[0] == 0) {
$row[] = array('data' => $gStartPositionInternships[$i]);
}
$i++;
// add the row to the "big row data (contains all rows)
$rows[] = array('data' => $row);
}
$output = theme('table', $header, $rows);
return $output;
Now I want that I can choose how many times, we can shift. 1 shift or 2 or more shifts. What I want exists in PHP?
Something like this:
//get the array keys for the interns and students...
$intern_keys = array_keys($gStartPositionInternships);
$student_keys = array_keys($gStartPositionStudents);
//drop the last intern key off the end and pin it to the front.
array_unshift($intern_keys, array_pop($intern_keys));
//create a mapping array to join the two arrays together.
$student_to_intern_mapping = array();
foreach($student_keys as $key=>$value) {
$student_to_intern_mapping[$value] = $intern_keys[$key];
}
You'll need to modify it to suit the rest of your code, but hopefully this will demonstrate a technique you could use. Note the key line here is the one which does array_unshift() with array_pop(). The comment in the code should explain what it's doing.
I think you want to do array_slice($gPositionsStudents, 0, X) where X is the number of moves to shift. This slices of a number of array elements. Then do array_merge($gPositionsStudents, $arrayOfSlicedOfPositions); to append these to the end of the original array.
Then you can do an array_combine to create one array with key=>value pairs from both arrays.

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