check if file selected in field array in php - php

Question

I have to update database which consists of multiple fields of file input type.
name of all input fields are same.
<input type="text" name="title[]">
<input type="file" name="image[]">
<input type="text" name="title[]">
<input type="file" name="image[]">
<input type="text" name="title[]">
<input type="file" name="image[]">
Now it is not mandatory that all images are selected, there might be chances that all title are changed but only 3rd image is selected. Now i want to upload file only if image is selected else escape uploading.
this is action page:
<?php
$title = $_POST['title'];
$upload = 0;
for($i=0; $i<sizeof($title); $i++)
{
if(!empty($_FILES['image'][$i]))
{
// upload file and set flag upload=1
} else {
// set flag upload=0
}
if($upload == 1)
{
$qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>";
// execute $qry
} else {
$qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
// execute $qry
}
}
but every time only else statement is running event when image is selected and even when image is not selected.
Update 2 : Result of print_r($_FILES);
Array
(
[image] => Array
(
[name] => Array
(
[0] =>
[1] => Selection_238.png
[2] =>
)
[type] => Array
(
[0] =>
[1] => image/png
[2] =>
)
[tmp_name] => Array
(
[0] =>
[1] => /tmp/phpqSB0Jn
[2] =>
)
[error] => Array
(
[0] => 4
[1] => 0
[2] => 4
)
[size] => Array
(
[0] => 0
[1] => 72259
[2] => 0
)
)
)
Selected Image in 2nd input field

Answer 1

First of all you need to change = to == in your code if($upload = 1). because = is assignment operator not comparisonoperator.
Check it and may be your problem is solved. Otherwise please check below possible solution
1.
<?php
$title = $_POST['title'];
for($i=0; $i<sizeof($title); $i++)
{
if(!empty($_FILES['image']['name'][$i]))
{
// check if file uploaded then run below query
$qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>"; // you can apply if else here based on move_uploaded_file output
} else {
// set flag upload=0
$qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
}
}
?>
2.
<?php
$title = $_POST['title'];
$upload = 0; // define here
for($i=0; $i<sizeof($title); $i++)
{
if(!empty($_FILES['image']['name'][$i]))
{
// upload file and set flag $upload = 1
} else {
// set flag $upload = 0
}
if($upload == 1) // you need to change = (assignment) to == (comparision)
{
$qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>";
// execute $qry
} else {
$qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
// execute $qry
}
}
?>