mysql select query using imploded values - php

Question

I have to following situation: I'm making a search page. The search page is populated with MySQL select query selectboxes. Therefor the name of the checkboxes are like name="name[]".
To show you what I'm doing, I'll include a picture:
So if I were to check 1 Availability - like Week - the query will work perfectly. But if I choose 2 Availabilities, only the models with BOTH availabilites show instead of every model that has one of both availabilities.
Here is my code:
HTML:
$return2 = $tafel->query("SELECT DISTINCT whenpossible FROM models where arttype LIKE 'Model%'");
while($row1 = $return2->fetch(PDO::FETCH_ASSOC)){
$whenp = $row1['whenpossible'];
<input type="checkbox" name="when[]" value="<?= $whenp ?>"><span class="box2"><?= $whenp ?></span>
PHP:
if (!empty($_POST['gender'])) {
$genders = $_POST['gender'];
$gender = implode(",",$genders);
} else {
$gender = "%";
}
$select = $tafel->prepare("SELECT * FROM models
WHERE whenpossible LIKE :when");
$select->bindParam(':when', $when, PDO::PARAM_STR);
$select->execute();
Does anyone have an idea how to fix this so that I can choose either 1 or multiple options?
Thank you all very much!

Answer 1

In code you build incorrect SQL command.
For your example SQL is
SELECT * FROM table WHERE field LIKE '%value1,%value2'
This is wrong code. Correct code can be
SELECT * FROM table WHERE field LIKE '%value1' OR field LIKE '%value2'
You should rewrite your code for build correct SQL

Answer 2

For those who are interested or facing the same problem, here is the answer:
In case IN or FIND_IN_SET aren't working for you, you can try this.
Implode your value like so:
if (!empty($_POST['VALUE'])) {
$value = $_POST['VALUE'];
$valueimplode = implode('|', $value)
} else {
$value = 'somethingelse'
}
| is very important for the SQL function. It acts like OR.
SQL as followed:
$query = $db->prepare("SELECT * FROM table WHERE column REGEXP(:valueimplode)");
$query->bindParam(':value', $valueimplode, PDO::PARAM_STR);
$query->execute();
You will find all the results that you need.
If you have an empty value, you can do this:
if (!empty($_POST['VALUE'])) {
$value = $_POST['VALUE'];
$valueimplode = implode('|', $value)
} else {
$value = '%' <-- Wildcard, means EVERYTHING!!!
}
Then the SQL like this:
$query = $db->prepare("SELECT * FROM table WHERE (column REGEXP(:valueimplode) OR column LIKE :value)");
$query->bindParam(':value', $valueimplode, PDO::PARAM_STR);
$query->execute();
% doesn't work with REGEXP so it will go to LIKE, which will then select everything in that column. Meaning, it will result everything.
I hope someone has good use for this!