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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.logNote 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