Linkoteca. Archivo de navegación

Who is using chroot with php-fpm? Is it worth it?

15/09/2025 • chroot, PHP, PHP-FPM, SELinux, sysadmin

I don’t use chroot, but the default setup for modern versions of FPM already compartmentalizes everything adequately for example, the private /tmp directory. I agree with others that chroot is an outdated way of doing things.

Also, I use SELinux…yet another way of achieving many of the same goals of chrooting. I’d highly recommend setting up SELinux if you are not already using it. If you’re concerned enough about security that you’d even think of chrooting php-fmp, you probably want to set up SELinux and have it on «Enforcing» (it’s useless on «Permissive» mode, that’s really only suitable for the configuration phase of test servers.) Not only will it provide security with PHP, but you get a whole bunch of other security benefits of it.

I have done some pretty sophisticated things with a web server under SELinux, requiring me to manually change a number of policies, and while I have had a few prolonged sessions of frustration, maybe 3-4 hours at a time of banging my head against the wall trying to get the permissions set up properly, it is totally worth it. It’s all up-front work, and once you learn how to do it it’s very easy.

How to install or upgrade to PHP 8.3 on Ubuntu and Debian

27/09/2024 • Debian, Linux, PHP

# Install new PHP 8.3 packages
sudo apt install php8.3 php8.3-cli php8.3-{bz2,curl,mbstring,intl}# Install FPM OR Apache module
sudo apt install php8.3-fpm
# OR
# sudo apt install libapache2-mod-php8.2# On Apache: Enable PHP 8.3 FPM
sudo a2enconf php8.3-fpm
# When upgrading from an older PHP version:
sudo a2disconf php8.2-fpm## Remove old packages
sudo apt purge php8.2*

Set array pointer to a specific key or value in PHP

25/04/2023 • array pointer, desarrollo web, PHP

What PHP lacks is the ability to set the array pointer to an arbitrary key or value. There are ways to move forward and backward in the array but not a dedicated function to set the internal pointer to a specific key. Fortunately we can make it work, but it’s pretty archiac. We’ll need to loop through the array and look for what we want.

Convert hex color to RGB values in PHP

23/03/2023 • color, PHP

$hex = "#ff9900";
list($r, $g, $b) = sscanf($hex, "#%02x%02x%02x");
echo "$hex -> $r $g $b";

Running two PHP versions on the same server

08/02/2023 • PHP, sysadmin

Configuring Debian 11 Servers For PHP 8.1

01/02/2023 • Debian, Debian Bullseye, PHP, sysadmin

How to Install and Use Composer on Debian 11

01/02/2023 • composer, Debian, Debian Bullseye, desarrollo web, kimai2, PHP, sysadmin

Format a number with leading zeros in PHP

13/07/2022 • PHP, sprintf

$var = 1234567;
echo sprintf('%08d', $var);
// Output: 
// 01234567

PHP setcookie “SameSite=Strict”?

10/06/2021 • cookies, desarrollo web, PHP, setcookie

You can use the $options array to set the samesite value, for example:

setcookie($name, $value, [
‘expires’ => time() + 86400,
‘path’ => ‘/’,
‘domain’ => ‘domain.com’,
‘secure’ => true,
‘httponly’ => true,
‘samesite’ => ‘None’,
]);

The value of the samesite element should be either None, Lax or Strict.

How to Create URL Slug from String in PHP

02/05/2021 • desarrollo web, PHP

function slugify($urlString) {
$search = array(‘Ș’, ‘Ț’, ‘ş’, ‘ţ’, ‘Ş’, ‘Ţ’, ‘ș’, ‘ț’, ‘î’, ‘â’, ‘ă’, ‘Î’, ‘ ‘, ‘Ă’, ‘ë’, ‘Ë’);
$replace = array(‘s’, ‘t’, ‘s’, ‘t’, ‘s’, ‘t’, ‘s’, ‘t’, ‘i’, ‘a’, ‘a’, ‘i’, ‘a’, ‘a’, ‘e’, ‘E’);
$str = str_ireplace($search, $replace, strtolower(trim($urlString)));
$str = preg_replace(‘/[^\w\d\-\ ]/’, », $str);
$str = str_replace(‘ ‘, ‘-‘, $str);
return preg_replace(‘/\-{2,}’, ‘-‘, $str);
}

Sending multiple non-blocking cURL requests with PHP.

22/04/2021 • curl, curl_multi_init, desarrollo web, PHP

In this tutorial, I will show you how to send multiple non-blocking / asynchronous cURL requests using PHP. Furthermore, I will also show you how to get the output and HTTP response code for each request.

Ce que vous devez savoir sur les Attributes de PHP 8

17/01/2021 • desarrollo web, PHP

Les Attributes sont une forme de données structurées, qui permet d’ajouter des métadonnées à nos déclarations de classes, propriétés, méthodes, fonctions, paramètres et constantes.

How to Master the Translation of PHP Apps

31/08/2020 • desarrollo web, idiomas, PHP, Symfony

Building a truly international application is not just about translating strings. Other issues to consider are date and time formats, currency symbols and pluralization. Programmers often underestimate the complexity of localization and get stuck with homemade code that is a pain to maintain. So, let’s talk about PHP Arrays, gettext, frameworks, and Intl.

Shaarli. The personal, minimalist, super-fast, database free, bookmarking service

11/08/2020 • archivo digital, PHP, Shaarli

Do you want to share the links you discover? Shaarli is a minimalist bookmark manager and link sharing service that you can install on your own server. It is designed to be personal (single-user), fast and handy.

PHPMailer Guide. Sending emails to multiple recipients

01/12/2019 • PHP, PHPMailer

PHP Compatibility Checker

18/09/2019 • PHP, plugin, sysadmin, wordpress

The WP Engine PHP Compatibility Checker can be used by any WordPress website on any web host to check PHP version compatibility.

SymfonyCasts: PHP and Symfony Video Tutorial Screencasts

16/05/2019 • desarrollo web, PHP, Symfony

Simply the Best PHP & Symfony Tutorials

And the official way to learn Symfony

PHP Markdown Extra

08/11/2018 • markdown, Markdown Extra, PHP

Markdown Extra is an extension to PHP Markdown implementing some features currently not available with the plain Markdown syntax. Markdown Extra is available as a separate parser class in PHP Markdown Lib.