Light Logger

class.light-logger.php

<?php
/**
 * Super simple class for logging. Generates regular logs and csv files
 * @package     lightLogger
 * @author      Kevin Chappell <[email protected]>
 * @license     http://opensource.org/licenses/MIT The MIT License (MIT)
 * @since       lightLogger .5
 */

/**
 * # Log Usage
 * $log = new Logger();
 * $log->error( 'Something went wrong' );
 * ## Output
 * Jun-19-2015 05:53:32 | Error: Something went wrong
 *
 * # CSV Usage
 * $csv = new Logger('my.csv');
 * $row = array( 'name', 'email', 'phone' );
 * $csv->add_row( $row );
 * ## Output
 * name,email,phone
 */

class Logger {

	private $log_file;
	private $log = array();

	/**
	 * define the log file to be used
	 * @param string $filename
	 */
	public function __construct( $filename = null ) {
		$log_dir = __DIR__ . '/logs/';
		if ( ! file_exists( $log_dir ) ) {
			mkdir( $log_dir, 0600, true );
		}
		$this->log_file = is_null( $filename ) ? $log_dir.'log' : $log_dir.$filename;
	}

	/**
	 * Writes to log file before class is unloaded from memory
	 */
	public function __destruct() {
		$log_file = fopen( $this->log_file, 'a' );
		if ( ! empty( $this->log ) ) {
			$this->log[] = '';
			$log = implode( PHP_EOL, $this->log );
			if ( ! fwrite( $log_file, $log ) ) {
				chmod( $this->log_file, 0600 );
				if ( ! fwrite( $log_file, $log ) ) {
					// log a problem with the logger
					error_log( 'Could not write to ' . $log_file, 0 );
				}
			}
			fclose( $log_file );
		}
	}

	/**
	 * Use overloading to for dynamic log types
	 * @param  string $method
	 * @param  array  $args
	 * @return function       returns add_log()
	 */
	public function __call( $method, $args ) {
		return $this->add_log( ucfirst( $method ), $args[0] );
	}

	/**
	 * Add the timestamped log
	 * @param string $type log type
	 * @param string $text text to be logged
	 */
	public function add_log( $type, $text ) {
		$date = date( 'M-d-Y H:i:s' );
		$this->log[] = "$date | $type: $text";
		return true;
	}

	/**
	 * add a row to a csv file
	 * @param  array $columns array of columns to be added to the CSV
	 */
	public function add_row( $columns ) {
		$columns = array_map( function( $column ){
			return addslashes( $column );
		}, $columns );
		$this->log[] = implode( ',', $columns );
		return true;
	}

}