Search Arrays to Multidimensional Array - php

Question

I have 2 dimensional array like
$events = array(
array(
'desc' => 'Cancer Webinar',
'date' => '20201219'
),
array(
'desc' => 'CSR Management',
'date' => '20200812'
),
array(
'desc' => 'Company Anniversary',
'date' => '20200309'
)
);
$look = array('20201219','20200309');
result: array('Cancer Webinar','Company Anniversary');
The function call search from array list ($look) then find it to $events.
From the code above shoud return:
array('Cancer Webinar','Company Anniversary');

Answer 1

If the second array will just search by date use the following code
function search_from_array($array, $events) {
$result = [];
foreach($events as $event) {
if(in_array($event['date'], $array)) {
array_push($result, $event['desc']);
}
}
echo json_encode($result);
}
search_from_array($look, $events);
you can develop it more to can search with any key in the multidimensional array.
in case you want to search but many keys just add OR in the condition and make the same code for other keys like this
if(in_array($event['date'], $array) || in_array($event['desc'], $array))

Answer 2

You can make $look a dict, then check if the date key exist.
$events = array(
array(
'desc' => 'Cancer Webinar',
'date' => '20201219'
),
array(
'desc' => 'CSR Management',
'date' => '20200812'
),
array(
'desc' => 'Company Anniversary',
'date' => '20200309'
)
);
$look = array('20201219','20200309');
$look_dic = array_flip($look);
foreach($events as $event){
if(isset($look_dic[$event["date"]])){
$result[] = $event["desc"];
}
}
var_dump($result);