How to add multiple input same name to database MySQL - php

Question

Hi I want to add a lot of inputs with same name to my database.
I am working on a recipe submit form, that adds in ingredients with form input text. I have multiple inputs with same name, and want them all to be added to the database. By array of some sort.
I have a jquery that makes it possible to add in more ingredients and amount, don't think it is important for this question. So won't add.
Till now I have this html/php:
<form id="opskriftReg" name="opskriftReg" action="opskriftRegSave.php" method="post">
*Ingredienser:<br>
Ingrediens: <input type="text" name="ingredients[]">
Mængde: <input type="text" name="amount[]"><br>
<div id="InputsWrapper"></div>
<input type="button" id="AddMoreFileBox" value="Tilføj ingrediens"><br>
<input type="submit" value="Submit">
</form>
And this for php/database input:
$mysqli = new mysqli ("localhost","","","brugerreg");
//Add this php add to database:
$ingredients = $_POST['ingredients'];
$amount = $_POST['amount'];
echo $ingredients." ".$amount;
$sql = "INSERT INTO `brugerreg`.`opskriftreg` (`ingredients`,
`amount`) VALUES ('".$ingredients."', '".$amount."')";
$stmt = $mysqli->prepare($sql); $stmt->execute();

Answer 1

Make your jQuery print your inputs such as:
<input type="text" name="ingredients[]">
<input type="text" name="amount[]">
Note the [] in the name, these are called HTML input arrays.
Now you can access these inputs in your PHP as:
$ingredients = implode(',',$_POST['ingredients']);
$amount = implode(',',$_POST['amount']);
echo $ingredients."<br>".$amount; //you could comment this
$sql = "INSERT INTO `brugerreg`.`opskriftreg` (`ingredients`,
`amount`) VALUES ('".$ingredients."', '".$amount."')";
$stmt = $mysqli->prepare($sql); $stmt->execute();
You could use the implode() function to convert an array into a single string with a delimiter

Answer 2

Found here.
Every time you add new input with same name, append it with "[]", so in the end you get:
Ingrediens: <input type="text" name="ingredients[]">
Mængde: <input type="text" name="amount[]"><br>
Ingrediens: <input type="text" name="ingredients[]">
Mængde: <input type="text" name="amount[]"><br>
Ingrediens: <input type="text" name="ingredients[]">
Mængde: <input type="text" name="amount[]"><br>
And in php:
$ingredients = $_POST['ingredients']; // $ingredients is now an array
$amount = $_POST['amount']; // $amount is now an array
echo $amount[0];
echo $amount[1];
To insert it into database just prepare the query accordingly, for example iterate over the array and concatenate the "('".$ingredients."', '".$amount."')" for every pair.
$values = "".
for ($i = 0; $i < sizeof($amount); $i++) {
$values .= "('".$ingredients[$i]."', '".$amount[$i]."')";
if ($i != sizeof($amount) - 1) {
$values .= ", ";
}
}
$sql = "INSERT INTO `brugerreg`.`opskriftreg` (`ingredients`,`amount`) VALUES " . $values;