What is the best practice for allowing users to upload multiple files simultaneously in PHP?

When allowing users to upload multiple files simultaneously in PHP, the best practice is to use an array in the form input field name attribute, such as "file[]" to handle multiple files. This way, PHP can process each file separately and efficiently. Additionally, you can loop through the array of files to handle each one individually during the upload process. 

<form action="upload.php" method="post" enctype="multipart/form-data">
    <input type="file" name="file[]" multiple>
    <input type="submit" value="Upload">
</form>

<?php
if(isset($_FILES['file'])){
    $files = $_FILES['file'];
    
    foreach($files['tmp_name'] as $key => $tmp_name){
        $file_name = $files['name'][$key];
        $file_tmp = $tmp_name;
        
        // Process each file here (e.g. move_uploaded_file)
    }
}
?>

Keywords

file upload multiple files simultaneous PHP form submission

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