PHP

php(1) (PHP: Hypertext Preprocessor) is a scripting language designed for dynamic web pages.

The current version is 8, but older (unsupported) versions see continued use. The language has evolved rapidly and porting between versions can be a difficult task.

Contents

Example

<?php echo 'Hello, World!';

Embedded Example

php(1) can be embedded into web pages, if the web server supports it.

<!DOCTYPE html>
<html>
  <head>
    <title>PHP "Hello, World!" program</title>
    </head>
    <body>
    <?php
       echo '<p>Hello, World!</p>';
    ?>
  </body>
</html>

Installation

Most Linux and BSD distributions will offer a php package, as well as versioned packages (like php7).

Configuration

See here for details.

Logging PHP

To log a php(1) process, configure /etc/php/php.ini with:

display_errors = off
log_errors = on
error_log = "/var/log/php.log"

Some notable settings and their default values:

log_errors_max_len defaults to 1024; set to 0 for no limit
setting ignore_repeated_errors to 1 will suppress repeated log messages
setting ignore_repeated_source to 1 while ignore_repeated_errors is also 1 will suppress repeated log messages from different sources

Logging PHP-FPM

To log a pgp-fpm(8) pool, configure /etc/php/php.fpm.d/$pool.conf with:

[www]
access.format = "[%t] %m %{REQUEST_SCHEME}e://%{HTTP_HOST}e%{REQUEST_URI}e %f%Q%q (status=%s)"
access.log = /usr/local/var/log/$pool.log

Note that log_level is set in php-fpm.conf.

log_level = debug

To log php(1) processes differently for each php-fpm(8) pool, try:

[www]
php_admin_flag[log_errors] = on
php_admin_value[error_log] = /var/log/php-$pool.log

PHP

PHP