show array child dependent of the another array child member - php

Question

i have an array, and i want to show the array values if the name of same array repeat in another array and have true as value
my arrays like this
$array1 = [
array(
'id' => 1
'name' => internal_evidence
'price' => 30
'course_id' => 3
),
array(
'id' => 2
'name' => international_evidence
'price' => 450
'course_id' => 3
),
array(
'id' => 3
'name' => internal_evidence
'price' => 10
'course_id' => 1
),
array(
'id' => 4
'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 access and show all attr members with value true in array2
Also, the course_id from array1 must be the same as id in array2
Like this:
<p>internal_evidence with id=1 and price=30 </p>
<p>technical_evidence with id=4 and price=134 </p>
<p>internal_evidence with id=3 and price=10 </p>
i tried this code but its don`t work properly
$array1ByIdAndName = array_reduce($array1, static function ($byIdAndName, $entry) {
$byIdAndName[$entry['product_id']][$entry['e_name']] = $entry;
return $byIdAndName;
});
$array2 = array_map(static function ($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);
you should know to i dont want to show by id in array1 and array2. i want to show by course_id in array1 in array2 with true value in attr member in array2

Answer 1

you can just use this code
$array1ByIdAndName = array_reduce($array1, static function ($byIdAndName, $entry) {
$byIdAndName[$entry['course_id']][$entry['name']] = $entry;
return $byIdAndName;
});
$array2 = array_map(static function ($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'];
$entry[$attrName] = $array1ByIdAndName[$entry['id']][$attrName]['price'];
}
return $attrs;
}, []);
return $entry;
}, $array2);
echo '<pre>';
print_r($array2);