Log
Log_composite
Log_console
Log_daemon
Log_display
Log_error_log
Log_file
Log_mail
Log_mcal
Log_null
Log_observer
Log_sql
Log_sqlite
Log_syslog
Log_win

Log
   Log_observer_mail

composite.php
composite.php
console.php
console.php
daemon.php
display.php
display.php
error_log.php
error_log.php
file.php
file.php
Log.php
mail.php
mail.php
mcal.php
null.php
null.php
observer.php
observer_mail.php
pear_error_handler.php
php_error_handler.php
sql.php
sql.php
sqlite.php
sqlite.php
syslog.php
syslog.php
win.php
win.php