how to search array of checkboxes - php

Question

Im building a search form but how do you search a array of checkboxes?
here is my html form
<form method="get">
<label>
<input type="checkbox" name="material[]" value="metal">metal
</label>
<label>
<input type="checkbox" name="material[]" value="plastic">Plastic
</label>
<label>
<input type="checkbox" name="material[]" value="carbon">Carbon
</label>
<input type="text" name="keyword">
<input type="submit" value="search">
</form>
and the php so far is. So how can i search the material for each checked.
<?php
if(isset($_GET['keyword'])){
$keyword = $_GET['keyword'];
// $material = $_GET['material'];
// $Search->search($keyword);
}
?>
ANd the query would be so far
$query = $this->pdo->prepare('SELECT * FROM `shop` WHERE `material` = ?');

Answer 1

When posted this will submit an array named material (accessible via $_GET['material']) that contains only the values that were checked.
You can then use those or output them like this:
foreach ($_GET['material'] AS $material) {
echo $material;
}
Addition after the question was edited:
You can also implode() the array values with ', ' as glue and use that as the search parameter in your SQL statement. Just change it to use IN instead of =, like #Prashant M Bhavsar suggested in his answer.

Answer 2

I think this will help you
Get your submitted material array in variable
$material_array = $_POST['material'];
You can implode array in select query to fetch related result
$selected_search_material = implode(',', $material_array);
SELECT * FROM `shop` WHERE `material` IN ($selected_search_material)

Answer 3

I haven't tested this yet, but since you receive an array ($_get['material'] is already an array), just use the following code with find_in_set;
<?php
$materials = array();
if (array_key_exists('material', $_GET)) {
$materials = $_GET['material'];
}
$query = $this->pdo->prepare('SELECT * FROM `shop` WHERE find_in_set(cast(material as char), :materials');
$query->execute(array('materials' => $materials));
?>

Answer 4

Implode $_GET['material'] and use a different query:
$where = implode(', ',$_GET['material']);
$query = $this->pdo->prepare('SELECT * FROM `shop` WHERE `material` IN ?');
Then use $where in your execute();

Answer 5

You can use $materialValue to store into Database.
<?php
if(isset($_GET['material'])){
$material = $_GET['material'];
foreach($material as $materialIndex){
$materialValue .= $materialIndex.',';
}
}
// use value to store into db
pass $materialValue variable to IN query also remove last "," from string
$materialValue.substring(0,$materialValue.length()-1);
?>