How do I upload an image that can be updated but remains with the same name? [closed]

In order to upload, <form> has the attribute enctype="multipart/form-data" and method="POST" , as explained in:

• Upload does not work $ _FILES undefined index error

So for example:

<form action="upload.php" method="POST">
    <input type="file" name="foto_profile">
    <input type="submit" value="Upload">
</form>

The upload can be like this (I've used this link check):

<?php

$name = 'profilepic'; //Sem extensão

/*
Troque aqui conforme a necessidade
Se o arquivo de upload estiver na mesma pasta que a pasta
./gh-pages pode fazer isso:

$caminhosite = 'gh-pages/images/';
*/
$caminhosite = 'http://localhost/gh-pages/images/';

$location = $_SERVER['DOCUMENT_ROOT'] . '/gh-pages/images/';
$folderexists = is_dir($location);

function mimeType($file)
{
    $mimetype = false;

    if (class_exists('finfo')) {//PHP5.4+
        $finfo     = finfo_open(FILEINFO_MIME_TYPE);
        $mimetype  = finfo_file($finfo, $file);
        finfo_close($finfo);
    } else if (function_exists('mime_content_type')) {//php5.3 ou inferiror
        $mimetype = mime_content_type($file);
    }

    return $mimetype;
}

//Tenta criar a pasta se ela não existir
if (!$folderexists) {
    //Usei o 0644 para acaso o servidor seja linux
    $folderexists = mkdir($diretorio, 0644, true);
}

if (!$folderexists) {
    echo 'A pasta não existe e não foi possível cria-la';
} else if (isset($_FILES['foto_profile'])) {
    $tmp_name = $_FILES['foto_profile']['tmp_name'];

    $error = $_FILES['foto_profile']['error'];

    if ($error !== UPLOAD_ERR_OK) {
        echo 'Erro ao fazer o upload:', $error;
    } else {

        $permitidos = array(
            'jpeg', 'png', 'gif'
        );

        $info = mimeType($rowData['imagem']);

        //Transforma image/jpeg em jpeg por exemplo
        $info = str_replace('image/', '', $infos);
        $info = str_replace('x-', '', $infos);

        /*
         * Adiciona extensão ao nome da foto, podendo ficar como:
         * profilepic.jpeg ou profilepic.png ou profilepic.gif
         */
        $name .= '.' . $info;

        if (!in_array($infos, $permitidos)) {
            echo 'O tipo de arquivo enviado é inválido, permitido somente imagens';
        } else if (move_uploaded_file($tmp_name, $location . $name)) {
            echo 'Upload completado, veja a foto<br>';

            $urlfoto = $caminhosite . $name . '?' . filemtime($location . $name);

            echo '<img src="' . $urlfoto . '">';
        } else {
            echo 'Erro ao mover o arquivo';
        }
    }
} else {
    echo 'Selecione um arquivo para fazer upload';
}

Avoiding the cache

At the moment of displaying the image there may be a cached version in the user's browser, to avoid you can use querystring as explained in this answer

• What is the reason for the "some number" suffix in the CSS link?

In this format:

http://site.com/images/profilepic.jpg?{unixtime da última atualização da foto}

For example:

http://site.com/images/profilepic.jpg?102992929292

To resolve this filemtime like this:

<?php
//Supondo que o caminho seja relativo
$caminho = '/gh-pages/images/profilepic.jpg';
$urlfoto = '/gh-pages/images/profilepic.jpg?' . filemtime($caminho);
?>

<img src="<?php echo $urlfoto; ?>">

Each time you update the file, the file incorporates a modification date, so it is possible to know the last one from which the file was updated.

Pro Navigator this (this number in front is unixtime that represents April 18, 2016):

http://site.com/gh-pages/images/profilepic.jpg?1460971238595

It is different from this (it represents December 5, 2016):

http://site.com/gh-pages/images/profilepic.jpg?1480971302550

But it will still be the same photo, however every time you upload the prppy function it will detect the new date and will change the unixtime in querystring.

I think there are three solutions to this: