PHP Logging class. WordPress code example

This code defines a Class_Log class with methods to log messages to a file. The constructor of the class takes an optional argument $args, which is an array that can contain the property log_path to specify a custom path for the log file.

The class has a method insert_title() which inserts a string message with the current time to the log file and a method insert_log() which inserts any data to the log file after converting it to a string using print_r(). The log file is saved in the logs/directory relative to the main PHP file calling this class, with a filename that starts with the current date in GMT format.

<?php


class Class_Log {

	public $log_path;

	function __construct( $args = false ) {

		if ( $args ) {
			$this->init_properties( $args );
		}

		if ( ! $this->log_path ) {

			$logDir = PATH . 'logs/';

			if ( ! file_exists( $logDir ) ) {
				wp_mkdir_p( $logDir );
			}

			$this->log_path = $logDir . gmdate( 'Y-m-d' ) . '.log';
		}
	}

	function init_properties( $args ) {
		$properties = get_class_vars( get_class( $this ) );

		foreach ( $properties as $name => $val ) {
			if ( isset( $args[ $name ] ) ) {
				$this->$name = $args[ $name ];
			}
		}
	}

	function insert_title( $title ) {

		$this->insert_log( gmdate( 'H:i:s' ) . " " . $title );
	}

	function insert_log( $data ) {

		if ( ! is_string( $data ) ) {
			$data = print_r( $data, true );
		}

		file_put_contents( $this->log_path, $data . "\n", FILE_APPEND );
	}

}