如何使用php从同一表单中的两个html输入字段上传文件？

Question

Hi I am facing a problem while uploading two files using php. I have this html input form with two files field

<form class="form-group" method="post" enctype="multipart/form-data">

<input type="file" accept=".jpg, .jpeg, .png" id="img" name="displaypic" required/>     

<input type="file" accept=".pptx" name="presentation" required>

<button name="submit>Submit</submit>   
</form>

This is my php code. Here I take the file data from the form but only the first one is uploaded, second file is not.

        <?php
    if(isset($_POST['submit'])){
    
        $file = $_FILES['displaypic'];
                  $fileName = $_FILES['displaypic']['name'];
                  $tempName = $_FILES['displaypic']['tmp_name'];
                  $size = $_FILES['displaypic']['size'];
                  $error = $_FILES['displaypic']['error'];
                  $format = $_FILES['displaypic']['type'];
                  $fileExt = explode('.', $fileName);
                  $fileActualExt = strtolower(end($fileExt));
                  $allowed = array('jpg', 'jpeg','png');
 
                  
            if(in_array($fileActualExt, $allowed)) {
                if ($error === 0) {
                    if ($size<2e6) {
                        $newname = $tid.".".$fileActualExt;
                        $location = 'displays/'.$newname;
                        move_uploaded_file($tempName,$location);
    }}}
    

Similarly when I write the same code for file two it doesn't work. Only the first file is uploaded not the second file.

    $file_ppt = $_FILES['presentation'];
                  $fileName = $_FILES['presentation']['name'];
                  $tempName = $_FILES['presentation']['tmp_name'];
                  $size = $_FILES['presentation']['size'];
                  $error = $_FILES['presentation']['error'];
                  $format = $_FILES['presentation']['type'];
                  $fileExt = explode('.', $fileName);
                  $fileActualExt = strtolower(end($fileExt));
                  $allowed = array('pptx');
 
                  
            if(in_array($fileActualExt, $allowed)) {
                if ($error === 0) {
                    if ($size<10e6) {
                        $newname = $tid.".".$fileActualExt;
                        $location = 'presentations/'.$newname;
                        move_uploaded_file($tempName,$location);
    }}}

} ?>

Kindly guide me and help me in this code.

Answer 1

If you use the same name for the file input field but use the array style syntax for the name you can assign your own identifier within the square braces which will be available in the POST / FILES array later. This identifier can be used to separate the different types of files so you can fork the logic as appropriate to your needs.

The following shows a basic usage of this methodology - it might prove of interest but it might not.

<?php
    $field='xfiles';     // Whatever you wish to name your file input elements
    $errors=array();
    $status=array();
    $maxfs=pow(1024,2) * 5; //5Mb or whatever.... 10e6?
    
    if( $_SERVER['REQUEST_METHOD']=='POST' && isset( $_FILES[ $field ] ) ){
        $obj=$_FILES[ $field ];
        
        foreach( $obj['name'] as $index => $void ){
            $name=$obj['name'][ $index ];
            $tmp=$obj['tmp_name'][ $index ];
            $error=$obj['error'][ $index ];
            $type=$obj['type'][ $index ];
            $size=$obj['size'][ $index ];
            $ext=strtolower(pathinfo($name,PATHINFO_EXTENSION));
            
            $allowed=(object)array(
                'displaypic'    =>  array('jpg','jpeg','png'),
                'presentation'  =>  array('ppt','pptx')
            );
            
            if( $error!==UPLOAD_ERR_OK )$errors[]=sprintf('An error [code:%d] occurred with file %s',$error,$name);
            if( !in_array( $ext, $allowed->$index ) )$errors[]=sprintf('Incorrect file extension %s for %s',$ext,$name);
            if( $size > $maxfs )$errors[]=sprintf('The file %s is too large @%d',$name,$size);
            
            
            
            if( empty( $errors ) ){
                $status[]=sprintf('<div>%s uploaded successfully - save to db, do a happy little dance or whatever else you need to do!</div>', $name );
                
                #move_uploaded_file($tmp,'/path/to/new/folder/'.$name);
                #$sql='insert into ....';
                
            }
        }
    }
?>
<!DOCTYPE html>
<html lang='en'>
    <head>
        <title>PHP: Multiple file uploads</title>
        <meta charset='utf-8' />
    </head>
    <body>
        <form class='form-group' method='post' enctype='multipart/form-data'>
            <label>Display - [accept:jpg,png]<input type='file' accept='.jpg, .jpeg, .png' name='xfiles[displaypic]' required /></label>
            <label>Presentation - [accept:ppt,pptx] <input type='file' accept='.ppt, .pptx' name='xfiles[presentation]' required /></label>
            <input type='submit' />
            <?php
                if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $status ) ){
                    echo '<h1>Success</h1>';
                    foreach($status as $msg)printf('<div>%s</div>',$msg);
                }
                
                if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $errors ) ){
                    echo '<h1>Error</h1>';
                    foreach($errors as $error)printf('<div>%s</div>',$error);
                }
            ?>
        </form>
    </body>
</html>