how to add image in html from a folder

1<img src="/images/flowers.jpg" alt="A Flower Bouquet"/>
2<img src= "./flowers.jpg" alt="A Flower Bouquet"/>
3<img src="../otherImages/flowers.jpg" alt="A Flower Bouquet"/>

1|-> myhtmlfiles
2      |-> index.html
3|-> images
4      |-> my_image.jpg
5
6<img src="../images/my_image.jpg">

1$conn = mysqli_connect("localhost", "root", "", "customer");
2	$image_details  = mysqli_query($conn, "SELECT * FROM customer_table");
3     while ($row = mysqli_fetch_array($image_details)) {     
4		
5      	echo "<img src='images/".$row['imagename']."' >";   
6      
7    }