What are some common issues when uploading multiple files using PHP?

One common issue when uploading multiple files using PHP is handling file arrays. When multiple files are uploaded, PHP stores them as arrays in the $_FILES superglobal. To properly handle multiple file uploads, you need to loop through each file in the array and process them individually. 

if(isset($_FILES['files'])){
    $files = $_FILES['files'];
    
    foreach($files['name'] as $key => $name){
        $tmp_name = $files['tmp_name'][$key];
        $error = $files['error'][$key];
        
        // Process each file here
    }
}

Keywords

file upload PHP multiple files max_file_uploads file size limit

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