How can the "supplied argument is not a valid stream resource" error be resolved when using fread in PHP for file uploads?

The "supplied argument is not a valid stream resource" error occurs when the file handle passed to the fread function is not a valid stream resource. To resolve this issue, make sure that the file handle is opened using fopen with the correct mode ('rb' for reading binary files). Additionally, check if the file handle is valid before passing it to fread. 

$file_handle = fopen($_FILES['file']['tmp_name'], 'rb');

if ($file_handle) {
    $file_content = fread($file_handle, filesize($_FILES['file']['tmp_name']));
    fclose($file_handle);

    // Further processing of the file content
} else {
    echo "Error opening file handle.";
}

Keywords

fread file uploads stream resource error PHP

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