MYSQL select display matching and non matching records - php

Question

I have a list of strings all separated by a new line. I need to match these strings with the value in a column in one single table. The problem is I need to display non-matching records as a defined value, example "not found" so the output remains the same length as the input and the results all remain in the same order.
Example Input
apple
orange
pear
banana
Desired Output
apple exists
orange not found
pear exists
banana exists
Is it possible to assign a custom value to records not found as well as display records found in a single statement?
Info seems to suggest I can create a statement using IFNULL to return non-matching records, I have experimented with this but to no avail.
<?php
// Wrap strings for select statement
$strings = $_POST['mystrings'];
$regex = '~<[^>]+>(*SKIP)(*FAIL)|\b\w+\b~';
$strings_wrapped = preg_replace($regex, "'\\0',", $strings);
$strings_prepared = substr($strings_wrapped, 0, -1);
// Statement
$select = "select * from table where specific_row in ($strings_prepared)";
// Connect
$connect = mysqli_query($con, $select);
// Retrieve rows
while ($row=mysqli_fetch_array($connect)) {
$column1 = $row['column1'];
$column2 = $row['column2'];
$column3 = $row['column3'];
$column4 = $row['column4'];
$column5 = $row['column5'];
// Display results
$results = "$column1-$column2-$column3-$column4-$column5\n";
echo $results;
}
?>
The matching rows are returned without error. I just don't know how to display the non-matching rows as well.

Answer 1

This is the approach you can use:
// Statement
$select = "select * from table where specific_row in ($strings_prepared)";
// Connect
$connect = mysqli_query($con, $select);
// Retrieve rows
$founded = [];
while ($row = mysqli_fetch_array($connect)) {
$founded[$row['specific_row']] = $row['column1']; // or whatever
}
foreach ($strings_prepared as $string) {
if (!empty($founded[$string])) {
echo 'found';
} else {
echo 'NOT found';
}
}

Answer 2

You can use a subquery to create a derived table containing the names you want to search for, and join that with the table.
SELECT a.value, IF(b.specific_row IS NULL, 'not found', 'exists') AS found
FROM (
SELECT 'apple' AS value
UNION
SELECT 'orange'
UNION
SELECT 'pear'
UNION
SELECT 'banana'
) AS a
LEFT JOIN table AS b ON a.value = b.specific_row