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How to Delete Specific Data from Database (SQL/PHP)

I have a file upload system where a user can upload an image/file with some text, and then it displays it.

I need help figuring out how to be able to delete a post by user command, so if the user posts an image with some text, the user can click a button next to the post and execute a command that deletes that post/image/text.

Here is my database display system:

<?php
$db = mysqli_connect("localhost", "boxofmem", "", "boxofmem_GMSConnect");
$sql = "SELECT * FROM images ORDER BY id ASC";
$result = mysqli_query($db, $sql);
while ($row = mysqli_fetch_array($result)) {
    echo "<div id='img_div'>";
    echo "<p style='font-family:Roboto;color:white;font-size:20px;'>".$row['text']."</p>";
    echo "<img src='images/".$row['image']."' ' style='width:100%;height:100%;'>";
    echo "</div>";
}

function deletePost() {


$db->query("DELETE from images WHERE id=0");


}

?>

DELETE FROM table_name WHERE condition;

DELETE FROM Customers
WHERE CustomerName='Alfreds Futterkiste';

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