how to check if the file field is empty?

Question

I am having a hard time using $_FILES

I want to check if it's empty or not and if it's not empty then it shouldn't try and uploading the file. How do I check this?

Answer 1

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

Answer 2

This should work

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

Answer 3

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 4

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

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

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