I'm working on algorithm to display my events on the website.
I want to sort my multidimensional array by specific key value.
My array:
["2022-02-28"]=>
array(1) {
[0]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
}
["2022-03-01"]=>
array(2) {
[2]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
[3]=>
array(3) {
["post_id"]=>
string(4) "3784"
["time"]=>
string(5) "13:00"
["priority"]=>
string(1) "0"
}
}
["2022-03-03"]=>
array(1) {
[5]=>
array(3) {
["post_id"]=>
string(4) "3663"
["time"]=>
string(5) "13:06"
["priority"]=>
string(1) "1"
}
}
}
I want to sort the array by "time" key value. So for example at this index :
["2022-03-01"]=>
array(2) {
[2]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
[3]=>
array(3) {
["post_id"]=>
string(4) "3784"
["time"]=>
string(5) "13:00"
["priority"]=>
string(1) "0"
}
}
I want first 13:00 to appear then 16:05. Thank you for your help in advance! :)
Try with this:
<?php
$arr = array();
$arr["2022-02-28"] = [
array("post_id"=>"3656", "time"=>"16:05", "priority"=>"0"),
array("post_id"=>"4856", "time"=>"13:05", "priority"=>"3")];
$arr["2022-03-01"] = [
array("post_id"=>"3656", "time"=>"16:05", "priority"=>"0"),
array("post_id"=>"3636", "time"=>"13:05", "priority"=>"1")
];
foreach($arr as $key => $value){
usort($value, function($a,$b){
return strtotime($a["time"])>strtotime($b["time"]);
});
$arr[$key] = $value;
}
echo "<pre>";
var_dump($arr);
echo "</pre>";
Output:
array(2) {
["2022-02-28"]=>
array(2) {
[0]=>
array(3) {
["post_id"]=>
string(4) "4856"
["time"]=>
string(5) "13:05"
["priority"]=>
string(1) "3"
}
[1]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
}
["2022-03-01"]=>
array(2) {
[0]=>
array(3) {
["post_id"]=>
string(4) "3636"
["time"]=>
string(5) "13:05"
["priority"]=>
string(1) "1"
}
[1]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
}
Use usort for define custom sort.
function time_sort(array $arr){
usort($arr, function($a, $b){
return strcmp($a['time'], $b['time']);
});
}
Related
I may seem having difficulty in understanding on how array works. So result, I can't work on the issue.
foreach($results as $key => $value){
$product_key = array(
'key' => $key
);
array_push($results, $product_key);
}
var_dump($results); exit;
Expected Output
array(2) {
[0]=>
object(stdClass)#21 (4) {
["items_id"]=>
string(1) "1"
["item_name"]=>
string(6) "laptop"
["price"]=>
string(5) "20000"
["quantity"]=>
string(2) "10"
["key"]=>
int(0)
}
[1]=>
object(stdClass)#22 (4) {
["items_id"]=>
string(1) "2"
["item_name"]=>
string(10) "smartphone"
["price"]=>
string(5) "10000"
["quantity"]=>
string(3) "200"
["key"]=>
int(1)
}
Unexpected Output
array(4) {
[0]=>
object(stdClass)#21 (4) {
["items_id"]=>
string(1) "1"
["item_name"]=>
string(6) "laptop"
["price"]=>
string(5) "20000"
["quantity"]=>
string(2) "10"
}
[1]=>
object(stdClass)#22 (4) {
["items_id"]=>
string(1) "2"
["item_name"]=>
string(10) "smartphone"
["price"]=>
string(5) "10000"
["quantity"]=>
string(3) "200"
}
[2]=>
array(1) {
["key"]=>
int(0)
}
[3]=>
array(1) {
["key"]=>
int(1)
}
}
You push new value (which is array) to the end of existsing array, what do you expect then?
If you want to modify current interated array value use this approach:
foreach($results as $key => $value) {
// use `->` as `$value` is object
$value->key = $key;
}
var_dump($results); exit;
I am trying to loop through a multidimensional array but in the foreach loop it just outputs error
index 'name' not found. index 'calories' not founder
foreach($responsex['foods'] as $fx5)
{
echo($fx5['name']);
echo($fx5['calories']);
}
Response: i.e. $responsex
array ( 'encodedId' => '4H8xxx', 'displayName' => 'sam', )array(3) {
["foods"]=> array(3) { [0]=> array(5) { ["isFavorite"]=> bool(false)
["logDate"]=> string(10) "2016-04-15" ["logId"]=> int(7139364449)
["loggedFood"]=> array(10) { ["accessLevel"]=> string(6) "PUBLIC"
["amount"]=> int(2) ["brand"]=> string(0) "" ["calories"]=> int(574)
["foodId"]=> int(536497687) ["locale"]=> string(5) "en_AU"
["mealTypeId"]=> int(7) ["name"]=> string(14) "Potato Pudding"
["unit"]=> array(3) { ["id"]=> int(91) ["name"]=> string(3) "cup"
["plural"]=> string(4) "cups" } ["units"]=> array(8) { [0]=> int(6754)
[1]=> int(91) [2]=> int(256) [3]=> int(279) [4]=> int(226) [5]=>
int(180) [6]=> int(147) [7]=> int(389) } } ["nutritionalValues"]=>
array(6) { ["calories"]=> int(574) ["carbs"]=> float(49.16) ["fat"]=>
float(34.98) ["fiber"]=> float(3.6) ["protein"]=> float(16.1)
["sodium"]=> int(1524) } } [1]=> array(5) { ["isFavorite"]=>
bool(false) ["logDate"]=> string(10) "2016-04-15" ["logId"]=>
int(7138517833) ["loggedFood"]=> array(10) { ["accessLevel"]=>
string(6) "PUBLIC" ["amount"]=> int(1) ["brand"]=> string(0) ""
["calories"]=> int(359) ["foodId"]=> int(535239347) ["locale"]=>
string(5) "en_AU" ["mealTypeId"]=> int(7) ["name"]=> string(54) "Fish,
Noodles and Vegetables in Cheese Sauce (Mixture)" ["unit"]=> array(3)
{ ["id"]=> int(91) ["name"]=> string(3) "cup" ["plural"]=> string(4)
"cups" } ["units"]=> array(8) { [0]=> int(6837) [1]=> int(91) [2]=>
int(256) [3]=> int(279) [4]=> int(226) [5]=> int(180) [6]=> int(147)
[7]=> int(389) } } ["nutritionalValues"]=> array(6) { ["calories"]=>
int(359) ["carbs"]=> float(28.01) ["fat"]=> float(14.05) ["fiber"]=>
float(2.9) ["protein"]=> float(29.08) ["sodium"]=> int(534) } } [2]=>
array(5) { ["isFavorite"]=> bool(false) ["logDate"]=> string(10)
"2016-04-15" ["logId"]=> int(7138326866) ["loggedFood"]=> array(10) {
["accessLevel"]=> string(6) "PUBLIC" ["amount"]=> int(1) ["brand"]=>
string(0) "" ["calories"]=> int(157) ["foodId"]=> int(536493638)
["locale"]=> string(5) "en_AU" ["mealTypeId"]=> int(7) ["name"]=>
string(11) "Cashew Nuts" ["unit"]=> array(3) { ["id"]=> int(226)
["name"]=> string(2) "oz" ["plural"]=> string(2) "oz" } ["units"]=>
array(4) { [0]=> int(226) [1]=> int(180) [2]=> int(147) [3]=> int(389)
} } ["nutritionalValues"]=> array(6) { ["calories"]=> int(157)
["carbs"]=> float(8.56) ["fat"]=> float(12.43) ["fiber"]=> float(0.9)
["protein"]=> float(5.17) ["sodium"]=> int(3) } } } ["goals"]=>
array(2) { ["calories"]=> int(1161) ["estimatedCaloriesOut"]=>
int(1411) } ["summary"]=> array(7) { ["calories"]=> int(1090)
["carbs"]=> float(85.73) ["fat"]=> float(61.46) ["fiber"]=> float(7.4)
["protein"]=> float(50.35) ["sodium"]=> int(2061) ["water"]=> int(0) }
}
you can recursively iterate through the arrays and print them as follows as key value pairs.
<?php
//initially call the function
print_array($responsex);
function print_array($array){
foreach($array as $key=>$value){
//recursively print the array
if(is_array($value)){
echo("Array : ".$key."\n");
print_array($value);
}
else{
echo($key." => ".$value);
}
}
}
?>
You can define additional tasks other than printing them with the above code.
Edit:
if you are sure that the array is two dimensional, no need to go recursively.
<?php
//initially call the function
print_array($responsex);
//if you are sure that the array is two dimensional, no need to go recursively.
function print_array($array){
foreach($array as $key=>$value){
if(is_array($value)){
if($key==="foods"){
var_dump($array[$key]);
}
}
else{
echo($key." => ".$value);
}
}
}
Use this way..
<?php
$keys = array_keys($data);// put your array name as a place of $data
$iterations = count($array[$keys[0]]);
for($i = 0; $i < $iterations; $i++) {
$data = array();
foreach($array as $key => $value) {
$data[$key] = $value[$i];
}
print_r($data);
}
?>
Below is example of my array
["value"]=>
array(16) {
[0]=>
string(5) "4"
[1]=>
string(4) "2"
[2]=>
string(4) "1"
[3]=>
string(4) "3"
}
["id"]=>
array(16) {
[0]=>
string(4) "four-id"
[1]=>
string(4) "two-id"
[2]=>
string(4) "one-id"
[3]=>
string(4) "three-id"
}
Now I am sorrting using array_multisort($arr["value"],SORT_NUMERIC, SORT_DESC); , which results in below output.
["value"]=>
array(16) {
[0]=>
string(5) "4"
[1]=>
string(4) "3"
[2]=>
string(4) "2"
[3]=>
string(4) "1"
}
["id"]=>
array(16) {
[0]=>
string(4) "four-id"
[1]=>
string(4) "two-id"
[2]=>
string(4) "one-id"
[3]=>
string(4) "three-id"
}
I want $arr["id"] to be sorted based on same sorting order of $arr["value"] like below
["id"]=>
array(16) {
[0]=>
string(4) "four-id"
[1]=>
string(4) "three-id"
[2]=>
string(4) "two-id"
[3]=>
string(4) "one-id"
}
You can use krsort
$array_1 = Array(4,2,1,3);
$array_2 = Array('four-id','two-id','one-id','three-id');
foreach ($array_1 as $key => $value) {
$array_merged[$value] = $array_2[$key];
}
krsort($array_merged);
foreach ($array_merged as $key => $value) {
$new_array_1[] = $key;
$new_array_2[] = $value;
}
echo '<pre>'.print_r( $new_array_1, true ).print_r( $new_array_2, true ).'</pre>';
I have 7 array fetched by mysql and its working correctly each array have exactly 9 rows which are city_names but one of the array has only 7 rows since two values on the results where null . This causes confunsion while dumping file in csv. I use the below code. Is there any way to check it by city name without using foreach for eact array ?
for($i=0 ; $i <= $count-2 ; $i++)
{
$data[] = $all_restaurants_opr_no_temp_off[$i]['city_name'];
$data[] = $all_restaurants_opr[$i]['total'];
$data[] = $all_restaurants_opr_no_temp_off[$i]['total'];
$data[] = $restaurants_opr_temp_off[$i]['total'];
$data[] = $restaurants_opr_operations_closed[$i]['total'];
$data[] = $restaurants_opr_automated[$i]['total'];
$data[] = $restaurants_opr_automated_working[$i]['total'];
$data[] = $restaurants_opr_online_payment[$i]['total'];
$data[] = $restaurants_opr_online_payment_with_tempoff[$i]['total'];
$data[] = $restaurants_opr_atleast_one_order[$i]['total'];
fputcsv($fp, $data,",");
unset($data);
}
Array 1:
array(9) {
[0]=>
array(2) {
["city_name"]=>
string(9) "Bangalore"
["total"]=>
string(3) "687"
}
[1]=>
array(2) {
["city_name"]=>
string(9) "Hyderabad"
["total"]=>
string(2) "16"
}
[2]=>
array(2) {
["city_name"]=>
string(6) "Mumbai"
["total"]=>
string(3) "568"
}
[3]=>
array(2) {
["city_name"]=>
string(7) "Chennai"
["total"]=>
string(3) "139"
}
[4]=>
array(2) {
["city_name"]=>
string(4) "Pune"
["total"]=>
string(3) "232"
}
[5]=>
array(2) {
["city_name"]=>
string(9) "Ghaziabad"
["total"]=>
string(2) "57"
}
[6]=>
array(2) {
["city_name"]=>
string(5) "Noida"
["total"]=>
string(2) "77"
}
[7]=>
array(2) {
["city_name"]=>
string(9) "Faridabad"
["total"]=>
string(1) "4"
}
[8]=>
array(2) {
["city_name"]=>
string(7) "Gurgaon"
["total"]=>
string(3) "113"
}
}
Array 2:
array(9) {
[0]=>
array(2) {
["city_name"]=>
string(9) "Bangalore"
["total"]=>
string(3) "674"
}
[1]=>
array(2) {
["city_name"]=>
string(9) "Hyderabad"
["total"]=>
string(2) "16"
}
[2]=>
array(2) {
["city_name"]=>
string(6) "Mumbai"
["total"]=>
string(3) "547"
}
[3]=>
array(2) {
["city_name"]=>
string(7) "Chennai"
["total"]=>
string(3) "135"
}
[4]=>
array(2) {
["city_name"]=>
string(4) "Pune"
["total"]=>
string(3) "202"
}
[5]=>
array(2) {
["city_name"]=>
string(9) "Ghaziabad"
["total"]=>
string(2) "56"
}
[6]=>
array(2) {
["city_name"]=>
string(5) "Noida"
["total"]=>
string(2) "77"
}
[7]=>
array(2) {
["city_name"]=>
string(9) "Faridabad"
["total"]=>
string(1) "4"
}
[8]=>
array(2) {
["city_name"]=>
string(7) "Gurgaon"
["total"]=>
string(3) "111"
}
}
Array 3:(Problem is here)
array(6) {
[0]=>
array(2) {
["city_name"]=>
string(9) "Bangalore"
["total"]=>
string(2) "13"
}
[1]=>
array(2) {
["city_name"]=>
string(6) "Mumbai"
["total"]=>
string(2) "21"
}
[2]=>
array(2) {
["city_name"]=>
string(7) "Chennai"
["total"]=>
string(1) "4"
}
[3]=>
array(2) {
["city_name"]=>
string(4) "Pune"
["total"]=>
string(2) "30"
}
[4]=>
array(2) {
["city_name"]=>
string(9) "Ghaziabad"
["total"]=>
string(1) "1"
}
[5]=>
array(2) {
["city_name"]=>
string(7) "Gurgaon"
["total"]=>
string(1) "2"
}
}
I'm not sure I understand the question 100%, but perhaps you can test each value if it is null and put a default value there if it is, for example, for this row, you could use this above your for loop:
foreach($badArray as $b){
$reformattedArray[$b['city_name']] = $b['total'];
}
then replace the bad array line with this in your for loop
data[] = is_null($reformattedArray[$all_restaurants_opr_no_temp_off[$i]['city_name']]) ? 'Default' : $reformattedArray[$all_restaurants_opr_no_temp_off[$i]['city_name']];
I need to calculate the frequency of all values in the array $inputArr in order to build frequency histogram.
$query="SELECT delay FROM TestDB;";
$result=DatabaseConnector::ExecuteQueryArray($query);
$inputArr = array();
foreach ($result as $row) {
$inputArr[] = array($row['delay']);
}
$freq = array_count_values ($inputArr);
But var_dump($freq) returns array(0). It's strange, because var_dump($inputArr) returns the following result (just a sample):
array(429) {
[0]=> array(1) { [0]=> string(1) "0" }
[1]=> array(1) { [0]=> string(1) "0" }
[2]=> array(1) { [0]=> string(1) "0" }
[3]=> array(1) { [0]=> string(1) "9" }
[4]=> array(1) { [0]=> string(2) "12" }
[5]=> array(1) { [0]=> string(1) "7" }
[6]=> array(1) { [0]=> string(2) "15" }
[7]=> array(1) { [0]=> string(1) "3" }
[8]=> array(1) { [0]=> string(2) "13" }
[9]=> array(1) { [0]=> string(1) "0" }
[10]=> array(1) { [0]=> string(1) "1" }
[11]=> array(1) { [0]=> string(2) "35" }
[12]=> array(1) { [0]=> string(2) "24" }
[13]=> array(1) { [0]=> string(2) "14" }
[14]=> array(1) { [0]=> string(1) "4" }
[15]=> array(1) { [0]=> string(1) "0" }
[16]=> array(1) { [0]=> string(2) "26" }
[17]=> array(1) { [0]=> string(1) "0" }
As it can be seen from this output, inputArr has repeating values, e.g. 0.
So, why $freq = array(0)?
I would consider skipping the PHP part and changing your SQL statement to do all the work for you:
SELECT delay, count(*) AS freq FROM TestDB GROUP BY delay;
$inputArr[] = array($row['delay']);
You are making each element in $inputArr an array. You don't need a 2d array here, just do:
$inputArr[] = $row['delay'];