Php Mysql multiple Selected Option - php

Question

hello mysql table is as below.
1.) edit-reference?id=58
When I enter the page, there is an error in my select operation, reference_categories all selected.
2.) Another issue is when I want to post the form
In the table "ref_sel_categories"
reference_id: 58 has reference_category_id: 92 in both columns.
table name 'reference'
id:58
referencetitle :helloword 1
id:59
referencetitle :helloword 2
table name 'reference_categories'
category_id: 92
category_name: word category 1
category_id: 93
category_name: word category 2
category_id: 94
category_name: word category 3
category_id: 95
category_name: word category 4
category_id: 96
category_name: word category 5
table 'ref_sel_categories'
id:1
reference_id:58
reference_category_id:92
id:2
reference_id:58
reference_category_id:93
id:3
reference_id:59
reference_category_id:94
id:4
reference_id:59
reference_category_id:94
id:5
reference_id:59
reference_category_id:94
$id = get('id');
$row = $db->from('reference')
->where('reference_id', $id)
->first();
$categories = $db->from('reference_categories')
->orderby('category_name', 'ASC')
->all();
$selectcategory = $db->from('ref_sel_categories')
->where('reference_id', $id)
->first();
if (post('submit')) {
$PostCategories = post('reference_categories');
if (!isset($error)) {
foreach ($_POST[$PostCategories as $selectedOption)
{
$update = $db->update('ref_sel_categories')
->where('reference_id', $id)
->set([
'reference_category_id' => $selectedOption,
]);
}
}
}
require 'edit-reference';
<form action="" method="post" enctype="multipart/form-data">
<select class="form-control" name="reference_categories[]" multiple data-max-options="4">
<?php foreach ($categories as $category): ?>
<option <?= ($_POST['reference_categories'] ? $_POST['reference_categories'] : $selectcategory['reference_category_id']) ? ' selected' : null ?>
value="<?= $category['category_id'] ?>"><?= $category['category_name'] ?></option>
<?php endforeach; ?>
</select>
<div class="card-footer ml-auto mr-auto">
<input type="hidden" name="submit" value="1">
<button type="submit" class="btn btn-warning">UPDATE</button>
</div>
</form>
<?php print_r($selectcategory['reference_category_id']) ?>
Database

Answer 1

I solved the problem. maybe it will help others.
$id = get('id');
$row = $db->from('reference')
->where('reference_id', $id)
->first();
$categories = $db->from('reference_categories')
->orderby('category_name', 'ASC')
->all();
$selectcategory = $db->from('ref_sel_categories')
->join('reference_categories', '%s.category_id = %s.reference_category_id')
->where('reference_id', $id)
->all();
$CatSelId = [];
foreach ($selectcategory as $SelCat) {
$CatSelId[] = trim($SelCat['reference_category_id']);
}
if (!isset($error)) {
$update = $db->update('reference')
->where('reference_id', $id)
->set($data);
if ($update) {
$postID = $id;
// Check and Add Any Changes in Category
$PostCategories = array_map('trim', $PostCategories);
$PostCategories = array_filter($PostCategories);
if (count($PostCategories) > 0) {
foreach ($PostCategories as $SelCat) {
// Kayıtlı Kategori var mı kontrol et
$row = $db->from('ref_sel_categories')
->where('reference_id', $id)
->where('reference_category_id', $SelCat)
->first();
if (!$row) {
$tagInsert = $db->insert('ref_sel_categories')
->set([
'reference_id' => $postID,
'reference_category_id' => $SelCat
]);
$ReferenceID = $db->lastId();
}
}
}
// Check Removed Selections! and delete
$diffs = array_diff($CatSelId, $PostCategories);
if (count($diffs) > 0) {
foreach ($diffs as $diff) {
foreach ($selectcategory as $allCategory) {
if (trim($allCategory['reference_category_id']) == $diff) {
$db->delete('ref_sel_categories')
->where('id', $allCategory['id'])
->where('reference_id', $id)
->done();
}
}
}
}
} else {
$error = 'Error';
}
}
<form action="" method="post" enctype="multipart/form-data">
<select class="form-control" name="reference_categories[]" multiple data-max-options="4">
<?php foreach ($categories as $category): ?>
<option <?= (post('reference_categories') ? post('reference_categories') : $CatSelId)
&& in_array($category['category_id'], (post('reference_categories') ? post('reference_categories') : $CatSelId)) ? 'selected' : null ?>
value="<?= $category['category_id'] ?>"><?= $category['category_name'] ?></option>
<?php endforeach; ?>
</select>
<div class="card-footer ml-auto mr-auto">
<input type="hidden" name="submit" value="1">
<button type="submit" class="btn btn-warning">UPDATE</button>
</div>
</form>