in_array function in php not working in foreach loop - php

Question

//codeigniter array passed form controller to view
$data['combined_array'] = array('75x35' => $output,'20x5' => $output1);
$all_dates = Array ('2019-11-19','2019-11-20', '2019-11-21','2019-11-22' );
foreach($combined_array as $key => $value){
foreach($value as $key1 => $value1)
{
foreach($value1 as $key2 => $value2)
{
if($value2['size'] == '20x5'){
if(in_array($value2['date'], $all_dates))
{
echo "exists -".$value2['date'];
}
else
{
echo "doesnt exists -".$value2['date'];
}
}
}
}
}
$value2['date'] contains the values 2019-11-20, 2019-11-21,2019-11-22. i want to check if all the values in all_dates exists in $value2['date']. if not then echo doesn't exists. but my code doesn't work.
var_export($combined_array)
array ( '75x35' => array ( '2019-11-19' => array ( 0 => array ( 'size' => '75x35', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-19', 'stock_out' => '4', ), ), '2019-11-20' => array ( 0 => array ( 'size' => '75x35', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-20', 'stock_out' => '6', ), ), '2019-11-21' => array ( 0 => array ( 'size' => '75x35', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-21', 'stock_out' => '5', ), ), '2019-11-22' => array ( 0 => array ( 'size' => '75x35', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-22', 'stock_out' => '5', ), ), ), '20x5' => array ( '2019-11-20' => array ( 0 => array ( 'size' => '20x5', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-20', 'stock_out' => '2', ), ), '2019-11-21' => array ( 0 => array ( 'size' => '20x5', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-21', 'stock_out' => '1', ), ), '2019-11-22' => array ( 0 => array ( 'size' => '20x5', 'category' => 'steel', 'type' => 'structural', 'sub_type' => 'flats', 'date' => '2019-11-22', 'stock_out' => '3', ), ), ), )

Answer 1

For checking each date value of each size row replace your if statement with a new one:
$temp = [];
foreach($combined_array as $key => $value){
foreach($value as $key1 => $value1)
{
foreach($value1 as $key2 => $value2)
{
//if($value2['size'] == '20x5'){
if (!in_array($value2['date'],$temp)){
$temp[] = $value2['date'];
if(in_array($value2['date'], $all_dates))
{
echo "exists -".$value2['date'];
echo "\r\n";
}
else
{
echo "doesnt exists -".$value2['date'];
echo "\r\n";
}
}
}
}
}
EDITED:
Or you can check all_dates values on existing inside defined size:
$temp = [];
foreach($combined_array as $key => $value){
if($key == '20x5') {
$temp = array_keys($value);
$diff = array_diff($all_dates, $temp);
foreach($all_dates as $date)
{
echo !in_array($date, $diff) ? "exists -".$date.PHP_EOL : "doesnt exists -".$date.PHP_EOL;
}
}
}
Demo

Answer 2

A simple solution is for each part of the combined array is to check the difference between the list of dates ( the keys ) and the list of dates you want. This can be done using array_keys() to get a list of the dates and array_diff() to check for missing dates...
foreach( $combined_array as $key => $value){
$dateMismatch = array_diff($all_dates, array_keys($value));
if(count($dateMismatch) > 0 ){
echo "Dates for {$key} missing=".implode(",", $dateMismatch).PHP_EOL;
}
}
This just displays the differences as...
Dates for 20x5 missing=2019-11-19
for your test data.
EDIT:
If you just want the dates different for 1 size, then you don't need a loop, just pick out the details first using something like $combined_array['20x5']...
$dateMismatch = array_diff($all_dates, array_keys($combined_array['20x5']));
if(count($dateMismatch) > 0 ){
echo "Dates missing=".implode(",", $dateMismatch).PHP_EOL;
}