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how to check in php if no file is selected in form – Jquery ajax

I send the data from a form with jquery ajax to php file.
I want to check if a user has chosen at least 1 file.
This is part of my form for the attachment file:

<input type="file" class="form-control-file" name="user_attachment[]" multiple="multiple">

My jquery ajax:

$.ajax({
    url: "contact.php",
    type: "POST",
    data:  new FormData(this),
    contentType: false,
    cache: false,
    processData:false,
    success: function(data){
        $(".response").html(data);
        $('.spinner').hide();
    },
                
});

And to check in contact.php if no file has been chosen:

$user_attachment_tmp = $_FILES['user_attachment']['tmp_name'];
$user_attachment = $_FILES['user_attachment']['name'];

// several checks if no file is chosen
if( empty($_FILES['user_attachment']['name']) ) {
    echo 'no file chosen'; // fails when nothing is chosen
}

if(!isset($_FILES['user_attachment']) || $_FILES['user_attachment']['error'] == UPLOAD_ERR_NO_FILE) {
    echo 'no file chosen'; // fails when nothing is chosen
}

if(!file_exists($_FILES['user_attachment']['tmp_name']) || !is_uploaded_file($_FILES['user_attachment']['tmp_name'])) {
    echo 'no file chosen'; // fails when nothing is chosen
}

So the problem is: in each case, when no file is selected, i do NOT get the message no file chosen

So how can i check if no file is selected (attached in the form)?

Tags:

2

Answers


  1. 0

    Since user_attachment[] is an array you can easily check with the count() function.

    $count = count($_FILES['user_attachment']['name']);
for ($i = 0; $i < $count; $i++) {
    if (empty($_FILES['user_attachment']['name'][$i])) {
        echo 'no file chosen';
    }

    if ($_FILES['user_attachment']['error'][$i] == UPLOAD_ERR_NO_FILE) {
        echo 'no file chosen';
    }

    if (!file_exists($_FILES['user_attachment']['tmp_name'][$i]) || !is_uploaded_file($_FILES['user_attachment']['tmp_name'][$i])) {
        echo 'no file chosen';
    }
}
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  2. 0

    You can check by using the size field on the $_FILES array like so:

    if ($_FILES['user_attachment']['size'] == 0 && $_FILES['user_attachment']['error'] == 0)
{
    // user_attachment is empty (and not an error)
}

    (I also check error here because it may be 0 if something went wrong. I wouldn’t use name for this check since that can be overridden)

    Copied from Rudi Visser answer

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