WordPress media_handle_sideload error message of Specified file failed upload test.

I got error “Specified file failed upload test.” when I try to upload image file using media_handle_sideload(). It took me several hours just to solve this. Haha

My HTML Form

<form class="row g-3 needs-validation" action="" method="post" enctype="multipart/form-data">< 
    <input type="file" class="form-control" name="filename">
    <button type="submit" class="btn btn-primary">Save</button>>
</form>

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<form class="row g-3 needs-validation" action="" method="post" enctype="multipart/form-data"><

<input type="file" class="form-control" name="filename">

<button type="submit" class="btn btn-primary">Save</button>>

</form>

My PHP

$media_id = media_handle_sideload($_FILES, 0, 'file description');

1	$media_id = media_handle_sideload($_FILES, 0, 'file description');

The error is not really verbose, it should say empty file found rather then failed test. My mistake I forgot to put the index ‘filename’ as in my form.

Solution

$media_id = media_handle_sideload($_FILES['filename'], 0, 'file description');

1	$media_id = media_handle_sideload($_FILES['filename'], 0, 'file description');