Why does php not return the extension of all images when renaming it?

Question

Why does php not return the extension of all images when renaming it?

Asked 5 years, 5 months ago

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I need to rename images when uploading, however, some images the code can not take the extension to finish the process correctly.

Thus ending: maisguarapari_5c4a3bec18563. (i.e., saving the image without the extension)

I try several times with the same image, but without success.

This is one of the images that I can’t get its extension from the code: https://www.maisguarapari.com.br/certo.jpg

Important to remember that, I take photos by my phone, the dozens of photos I send, some photos the code cannot catch its extension.

PHP

$nome = $_FILES['userfile']['name'];
$extensao = strtolower(end(explode('.', $nome)));
$nomenovoorigem = uniqid('maisguarapari_');
$nomenovo = $nomenovoorigem.".".$extensao;

HTML

<form class="frm_mural" action="/mural-gravar" method="post" enctype="multipart/form-data">
<input class="entrada_frm_mural" required="required" name="userfile" type="file">
<button class="entrada_frm_mural_enviar" type="submit">Enviar</button>
</form>

What is the print_r from $_FILES when this happens?

– Woss

2019/01/31 at 09:39
@Andersoncarloswoss I used this code print_r($_FILES); and returned that Array ( )

– Gladison

2019/01/31 at 09:42
Even sending the file through the form? The result seems that no file was sent. By the way, you had not asked this question?

– Woss

2019/01/31 at 09:43
@Andersoncarloswoss yes, but in another context. This case is very specific.

– Gladison

2019/01/31 at 09:45
@Andersoncarloswoss make the direct test by the link with the code that Bulfaitelo sent https://www.maisguarapari.com.br/teste.php

– Gladison

2019/01/31 at 09:48
The problem with being very specific is that it turns out to be non-reproducible. I recommend that you edit the question by putting all the possible information in the situation that the problem occurs, such as the request that the browser does, values of the superglobal in PHP, if JS influences the upload, server logs, etc.

– Woss

2019/01/31 at 09:48
Let’s go continue this discussion in chat.

– Gladison

2019/01/31 at 09:49
@Andersoncarloswoss Even using only his code, IE, totally dry, does not work to get the extension of the image that provided the link.

– Gladison

2019/01/31 at 09:51

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by Bulfaitelo • **1,684** points · Answer 1 · 2019-01-31T09:29:33+00:00

You can use the function pathinfo();:

pathinfo - Returns information about a file path

$path = $_FILES['userfile']['name'];
$extensao = pathinfo($path, PATHINFO_EXTENSION);
$nomenovoorigem = uniqid('maisguarapari_');
$nomenovo = $nomenovoorigem.".".$extensao;

Applied Example:

<!DOCTYPE html>
<html lang="en">
<body>
    <form class="frm_mural" action="index.php" method="post" enctype="multipart/form-data">
        <input class="entrada_frm_mural" required="required" name="userfile" type="file">
        <button class="entrada_frm_mural_enviar" type="submit">Enviar</button>
    </form>
</body>
</html>
<?php
$path = $_FILES['userfile']['name'];
$extensao = pathinfo($path, PATHINFO_EXTENSION);
$nomenovoorigem = uniqid('maisguarapari_');
$nomenovo = $nomenovoorigem.".".$extensao;

var_dump($nomenovo);