PHP to have required text fields - php

Question

I have created a simple form that currently submits to a database. I am now wanting to add validation so that each field is required to be filled in.
This is what i have so far:
<?php include("header.php"); ?>
</br>
<form method = "post" action = "post-poster.php">
<label>Address Line 1:</label> <input name="addline1" id="addline1"></br>
<label>Area:</label> <input name="area" id="area"></br>
<label>Description:</label> <input name="description" id="description"></br>
<label>Bedrooms: </label><input name="bedrooms" id="bedrooms"></br>
<label>Bathrooms:</label> <input name="bathrooms" id="bathrooms"></br>
<label>Landlords Name:</label> <input name="lname" id="lname"></br>
<label>Landlords Number:</label> <input name="lphone" id="lphone"></br>
<label>Landlords Email:</label> <input name="lemail" id="lemail"></br>
</br>
<input type="submit" value="Submit">
</form>
<?php include("footer.php"); ?>
and this is the file that submits to the DB, i have blanked my db details:
<?php
/*
Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password)
*/
$link = mysqli_connect("localhost", "inspire_****", "*****", "inspire_****");
// Check connection
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
// Escape user inputs for security
$addline1 = mysqli_real_escape_string($link, $_POST['addline1']);
$area = mysqli_real_escape_string($link, $_POST['area']);
$description = mysqli_real_escape_string($link, $_POST['description']);
$bedrooms = mysqli_real_escape_string($link, $_POST['bedrooms']);
$bathrooms = mysqli_real_escape_string($link, $_POST['bathrooms']);
$lname = mysqli_real_escape_string($link, $_POST['lname']);
$lphone = mysqli_real_escape_string($link, $_POST['lphone']);
$lemail = mysqli_real_escape_string($link, $_POST['lemail']);
// attempt insert query execution
$sql = "INSERT INTO posts (addline1, area, description, bedrooms, bathrooms, lname, lphone, lemail) VALUES ('$addline1', '$area', '$description', '$bedrooms', '$bathrooms', '$lname', '$lphone', '$lemail')";
if(mysqli_query($link, $sql)){
echo "Records added successfully.";
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// close connection
mysqli_close($link);
?>
If anyone can help me i would be greatly appreciated

Answer 1

One way, perhaps the lazy way, is to add required to each input tag. For example
<input name="addline1" id="addline1" required>
You can add the key word required in this manner to all input tags that apply.