php多文件上传，file_exist

Question

I'm new to programming in PHP, and I'm trying to make a multiple file upload script, but I don't know how to check if the uploading files already exist! How can I do that? Can you help me? This is my code:

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

foreach($_FILES['files']['name'] as $i => $name) {

    $name = $_FILES['files']['name'][$i];
    $size = $_FILES['files']['size'][$i];
    $type = $_FILES['files']['type'][$i];
    $tmp = $_FILES['files']['tmp_name'][$i];

    $explode = explode('.', $name);

    $ext = end($explode);

    $path = 'uploads/';
    $path = $path . basename( $explode[0] . time() .'.'. $ext);
    
    $errors = array();

    if(empty($_FILES['files']['tmp_name'][$i])) {
        $errors[] = 'Please choose at least 1 file to be uploaded.';
    }
    if(empty($errors)) {
        
        if(!file_exists('uploads')) {
            mkdir('uploads', 0777);
        }

        if(move_uploaded_file($tmp, $path)) {
            echo '<p>The file <b>'.$name.'</b> successfully uploaded</p>';
        }else {
            echo 'Something went wrong while uploading the file <b>'.$name.'</b>';
        }

    }else {
        foreach($errors as $error) {
            echo '<p>'.$error.'<p>';
        }
    }

}
?>

</div>

Answer 1

file_exists return true if file is there in directory. So, you have to keep move_uploaded_file inside that if condition where file_exists you are checking.

For more info, check this File Exist - W3 Schools

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

    foreach($_FILES['files']['name'] as $i => $name)
    {

        $name = $_FILES['files']['name'][$i];
        $size = $_FILES['files']['size'][$i];
        $type = $_FILES['files']['type'][$i];
        $tmp = $_FILES['files']['tmp_name'][$i];

        $explode = explode('.', $name);

        $ext = end($explode);

        $path = 'uploads/';
        $path = $path . basename( $explode[0] . time() .'.'. $ext);

        $errors = array();

        if(empty($_FILES['files']['tmp_name'][$i])) {
            $errors[] = 'Please choose at least 1 file to be uploaded.';
        }
        if(empty($errors)) 
        {

            if(!file_exists($path))
            {

                if(move_uploaded_file($tmp, $path)) 
                {
                    echo '<p>The file <b>'.$name.'</b> successfully uploaded</p>';
                }
                else
                {
                    echo 'Something went wrong while uploading the file <b>'.$name.'</b>';
                }
            }
        }
        else
        {
            foreach($errors as $error)
            {
                echo '<p>'.$error.'<p>';
            }
        }

    }