How to check mulitple files empty or not in php? - php

Question

I want to check multiple files name are empty or not in php before inserting the database.
Kindly check what I am doing:
Try 1:
$filename1 = $_FILES['photo1']['name'];
$filename2 = $_FILES['photo2']['name'];
$filename3 = $_FILES['photo3']['name'];
if (empty($filename1 == "" && $filename2 == "" && $filename3 == ""))
{
$errors[] = 'All Images are required.';
}else{
// Files are not empty
}
Try 2:
if (empty($_FILES)) {
$errors[] = 'All images are required.';
}else{
}
if (empty(['photo1']['name'];)) {
$errors[] = 'Kindly Upload Image 1.';
}
if (empty(['photo2']['name'];)) {
$errors[] = 'Kindly Upload Image 2.';
}
if (empty(['photo3']['name'];)) {
$errors[] = 'Kindly Upload Image 3.';
}
For me both are not working as I want,
1)if someone upload image 1 then no error will show.
2)if someone do not upload image 3 then error will show kindly upload image 3
3)If someone do not upload image 2 then error will show kindly upload image 2
4)If someone do not upload all images then error will show all images are required.
Any idea or suggestions would be welcome.

Answer 1

You are not using the empty function correctly. It doesn't support multiple parameters and you have to recall it for every var you need to check.
if (empty($filename1) && empty($filename2) && empty($filename3))
{
btw, I think what you need in this case is the isset function, determining if a variable is set and is not NULL. This time, it support multiple parameters.
if (!isset($filename1, $filename2, $filename3))
{

Answer 2

The time to check for empty or missing values is before you assign to a variable. Trying to assign, for example, $filename1 = $_FILES['photo1']['name'] will result in an undefined index notice, if photo 1 hasn't been uploaded. The following code sets each variable to the appropriate filename, or null if it hasn't been uploaded. Then you can check for each one in turn.
<?php
$filename1 = $_FILES['photo1']['name'] ?? null;
$filename2 = $_FILES['photo2']['name'] ?? null;
$filename3 = $_FILES['photo3']['name'] ?? null;
if ($filename1 && $filename2 && $filename3) {
// do stuff
} elseif (!$filename1 && !$filename2 && !$filename3) {
$errors[] = 'All images are required.';
} else {
if (!$filename1) {
$errors[] = 'Kindly Upload Image 1.';
}
if (!$filename2) {
$errors[] = 'Kindly Upload Image 2.';
}
if (!$filename3) {
$errors[] = 'Kindly Upload Image 3.';
}
}