php-systemd

PHP extension allowing native interaction with systemd and journald

Installation

Prerequisites

.deb based

sudo apt install php5-dev  libsystemd-dev

.rpm based

sudo dnf install php-devel systemd-devel

Build

phpize
./configure --with-systemd
make

Setup

sudo make install

Fedora

echo "extension=systemd.so" | sudo tee /etc/php.d/systemd.ini

Debian (PHP 5)

echo "extension=systemd.so" | sudo tee /etc/php5/mods-available/systemd.ini
sudo php5enmod systemd

Basic Test

echo "<?php echo sd_journal_send('MESSAGE=hello world');" | php

Usage

Quick example:

<?php
sd_journal_send('MESSAGE=Hello world.');
// message with priority "3" (warning) and identifier (also called *TAG*) set to "appname" 
sd_journal_send('MESSAGE=Error message','PRIORITY=3', 'SYSLOG_IDENTIFIER=appname');"

Notes:

• Each argument must be in the form of a KEY=value pair, environmental variable style.
• Unlike the native C version of journald's sd_journal_send(), printf-style substitution is not supported. Perform any substitution using PHP's sprintf() or similar capabilities first.
• The base message is usually sent in the form MESSAGE=hello. The MESSAGE field is, however, not required.
• Invalid arguments result in nothing recorded in the journal.

Viewing Output

Quick way to view output with all fields as it comes in:

sudo journalctl -f --output=json