How to check if the file input field is empty?

Question

I am having a hard time using $_FILES

I want to check if file upload field is empty or not then apply a condition such that if file upload is empty then the script doesn't try uploading the file. How do I enforce this?

Answer 1

if($_FILES["file"]["error"] != 0) {
//stands for any kind of errors happen during the uploading
} 

also there is

if($_FILES["file"]["error"] == 4) {
//means there is no file uploaded
}

Answer 2

This should work

if ( ! empty($_FILES)) {...}

Answer 3

The other answers didn't work for me. So I post my solution:

if($_FILES['theFile']['name']=='')
{
    //No file selected
}

Answer 4

Here's what worked for me:

if ($_FILES['theFile']['tmp_name']!='') {
    // do this, upload file
} // if no file selected to upload, file isn't uploaded.

Answer 5

You can use the UPLOAD_ERR_NO_FILE value:

function isset_file($file) {
    return (isset($file) && $file['error'] != UPLOAD_ERR_NO_FILE);
}

if(isset_file($_FILES['input_name'])) {
    // It's not empty
}

Updated: Since sending $_FILES['input_name'] may throw a Notice

function isset_file($name) {
    return (isset($_FILES[$name]) && $_FILES[$name]['error'] != UPLOAD_ERR_NO_FILE);
}

if(isset_file('input_name')) {
    // It's not empty
}

Answer 6

this question is duplicate but your answer is is_uploade_file() function.

Answer 7

if(!empty($_FILES['myFileField'])) {
    // file field is not empty..
} else {
    // no file uploaded..
}

Answer 8

To check if an input of type file is empty you will have to take any of $_FILES arrays and check it against an empty array. All that I have seen above is check against an empty string which will not work. Example:

if($_FILES["your_field_name"]["size"] == [' '])
{
Perform your validation here•
}

I hope this helps.