What are common pitfalls when handling multiple file uploads in PHP forms?

One common pitfall when handling multiple file uploads in PHP forms is not properly iterating through the $_FILES array to process each file individually. To solve this, you need to loop through the array and handle each file upload separately. 

if(isset($_FILES['files'])){
    $file_array = reformatFilesArray($_FILES['files']);

    foreach($file_array as $file){
        $file_name = $file['name'];
        $file_tmp = $file['tmp_name'];
        
        // Process each file upload here
    }
}

function reformatFilesArray($files){
    $file_array = array();
    $file_count = count($files['name']);
    $file_keys = array_keys($files);

    for($i = 0; $i < $file_count; $i++){
        foreach($file_keys as $key){
            $file_array[$i][$key] = $files[$key][$i];
        }
    }

    return $file_array;
}

Keywords

file uploads PHP forms handling multiple pitfalls

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