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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.php
Subject: Re: Show picture in window
Date: Sat, 19 Oct 2019 20:39:38 +0200
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Xref: csiph.com comp.lang.php:18082

Heiko Wetteborn:

> (sorry for german language)
> Hallo Leute,
> 
> ist de.comp.lang.php tot?

It doesn't matter, if de.comp.lang.php is "dead" or not. This is still
an English speaking newsgroup.

[...]
> Hier nun das Script (PHP 5.4):

PHP 5.4 is *way* outdated! You should use at least PHP 7.1 and even this
version will be end of life this year. So better start at least with PHP
7.2.

Also see: <https://www.php.net/supported-versions.php>

> <?PHP
> include("function.php");

What is in function.php?

> $bildnr=$_GET['bildnr'];
> $dir= documentroot() . "/fotoalbum/*.jpg";

What does documentroot() return?

> foreach (glob($dir) as $filename)
> {
>     $eintraege[] = $filename;
> }
> $picname = $eintraege[$bildnr - 1];
> if (file_exists($picname))
> {
>     Header ("Content-type: image/jpeg");

header() and not Header() - also see:

https://www.php.net/manual/en/function.header.php

You should also get familiar with a PHP debugger like xdebug and an
editor which suports debugging.

-- 
Arno Welzel
https://arnowelzel.de