Display the member of one array depending on the other array - php

Question

i have an array i and i want to show the array values if the name of same array repeat in the another array and have true value
my arrays like this
$array1 = [
array(
'name' => internal_evidence
'price' => 30
'course_id' => 3
),
array(
'name' => international_evidence
'price' => 450
'course_id' => 3
),
array(
'name' => internal_evidence
'price' => 10
'course_id' => 1
),
array(
'name' => technical_evidence
'price' => 134
'course_id' => 3
),
];
$array2 = [
array(
'id' => 3
'name' => graphic
'price' => 150
'attr' => array(
'internal_evidence' => 'true',
'international_evidence' => 'false',
'technical_evidence' => 'true'
)
),
array(
'id' => 5
'name' => 3dmax
'price' => 300
'attr' => array(
)
),
array(
'id' => 1
'name' => ICDL
'price' => 480
'attr' => array(
'internal_evidence' => 'true',
)
),
];
i want to showing this all attr selected with true value in like this
also I want to sum price of array2 member and array1
<h2>graphic</h2>
<p>internal_evidence</p>
<p>technical_evidence</p>
<small>course price: 150</small>
<small>314</small> <!-- Price with selected evidence -->
<h2>3dmax</h2>
<small>course price: 300</small>
<!-- its not have attr evidence -->
<h2>ICDL</h2>
<p>internal_evidence</p>
<small>course price: 480</small>
<small>490</small> <!-- Price with selected evidence -->
i try this but its don`t work properly
$priceOfAttr = 0;
foreach($array2 as $key => $cat):
echo "<h2>{$cat['name']}</h2>";
foreach($array1 as $pr):
if($pr['course_id'] == $cat['id']):
foreach($cat['attr'] as $m => $optionV):
if($m == $pr['name'] && $optionV == "true"){
echo $m .'<br>';
$priceOfAttr += $pr['price'];
// echo "<small>{$cat['price']}</small><br>";
// echo $cat['price'] + $pr['price']. "<br>";
}
endforeach;
echo $priceOfAttr + $cat['price'] . '<br>';
endif;
endforeach;
echo '<br>';
endforeach;

Answer 1

I'd use a combination array_reduce and array_map to transform your data into what you need, then simply loop over that to display your view:
<?php
// Index your $array1 by [id][name]
$array1ByIdAndName = array_reduce($array1, static function ($byIdAndName, $entry) {
$byIdAndName[$entry['course_id']][$entry['name']] = $entry;
return $byIdAndName;
});
// Transform $array2's `attr` entries into attribute list + compute total price
$array2 = array_map(static function ($entry) use ($array1ByIdAndName) {
$entry['total_price'] = $entry['price'];
$entry['attr'] = array_reduce(array_keys($entry['attr']), static function ($attrs, $attrName) use ($array1ByIdAndName, &$entry) {
if ($entry['attr'][$attrName] === 'true') {
$attrs[] = $attrName;
$entry['total_price'] += $array1ByIdAndName[$entry['id']][$attrName]['price'];
}
return $attrs;
}, []);
return $entry;
}, $array2);
// Display your view
?>
<?php foreach ($array2 as $entry): ?>
<h2><?= $entry['name'] ?></h2>
<?php foreach ($entry['attr'] as $attrName): ?>
<p><?= $attrName ?></p>
<?php endforeach ?>
<small>course price : <?= $entry['price'] ?></small>
<?php if ($entry['total_price'] > 0): ?>
<small><?= $entry['total_price'] ?></small>
<?php endif ?>
<?php endforeach ?>
Demo: https://3v4l.org/nS3Gl