PHP log usage experience (2)

<? PHP  /*  ** Create by: Xiaojiang * the PHP log storage function is only for communication and learning.  */  Class  Config {  Public   Static   Function  Getconfig (){  Return   Array  ( 'Log _ level' => 75 //  Info );}}  Class   Log  {  Private   $ Logfile  ;  Private   $ Loglevel  ;  Const DEBUG = 100 ;  Const Info = 75 ;  Const Notice = 50 ; Const Warning = 25 ;  Const Error = 10 ;  Const Critical = 5 ;  Private   Function  _ Construct (){}  Public   Static   Function Getinstance ( $ Name  ){  Return  Log : Backendmanager ( $ Name  );}  Public   Static   Function Register ( $ App , $ Params  ){  $ Urldate = Parse_url ( $ Params  );  If (!Isset ( $ Urldate ['Scheme' ]) {  Throw   Exception ('Invalid log connection' );}@  Include ('Logger/backend '. $ Urldate ['Scheme '].'. Class. php' );  $ Classname = $ Urldate ['Scheme ']. 'backend' ;  If (!Class_exists ( $ Classname  )){  Throw   New   Exception ('Invalidclassname '. $ Classname  );}  $ Backobj = New   $ Classname ( $ Params  );  Log : Backendmanager ($ App , $ Backobj  );}  Private   Static   Function Backendmanager ( $ Name , $ OBJ = Null  ){  Static   $ Backends_arr  ;  If (! Isset ($ Backends  )){  $ Backends = Null  ;}  If ( Isset ( $ OBJ  )){  $ Backends_arr [ $ Name ] = $ OBJ  ;}  Else  { If (! Isset ( $ Backends_arr [ $ Name  ]) {  Throw   New   Exception ("The specified { $ Name } Was not registered" );}  Return   $ Backends_arr [ $ Name  ] ;}} Public   Function Leveltostring ( $ Loglevel  ){  $ RET = '[Unknow]' ;  Switch ( $ Loglevel  ){  Case   Log : Debug: $ RET = 'Log: debug' ;  Break ;  Case   Log : Info: $ RET = 'Log: info' ;  Break  ;  Case   Log : Notice: $ RET = 'Log: notice' ;  Break  ;  Case  Log : Warning: $ RET = 'Log: warning' ;  Break  ;  Case   Log : Error: $ RET = 'Log: error' ;  Break  ;  Case   Log : Critical:$ RET = 'Log: Critical' ;  Break  ;}  Return   $ RET  ;}}  Try  {  Log : Register ('error', 'HTTP: // localhost? User_name = root & dbname = Test & table = Test & Password =' );}  Catch ( Exception   $ E ){  Echo   $ E -> Getmessage ();}  Try  {  $ Logins = Log : Getinstance ('error' );}  Catch ( Exception   $ E  ){  Echo   $ E ->Getmessage ();}  $ Logins -> Logmessage ('haha ', Log : Info, 'test' );  /*  ** File logger/httpbackend. Class. php  */  Class  Httpbackend {  Public   Function _ Construct ( $ Params  ){  $ Date =Parse_url ( $ Params  );  Parse_str ( $ Date ['Query'], $ Url_params  );  $ This -> DB = @ Mysql_connect ( $ Date ['Host'], $ Url_params ['User _ name'], $ Url_params ['Password' ]); If (! Is_resource ( $ This -> DB )){  Throw   New   Exception ('Invalid dB resource' );}  Mysql_select_db ( $ Url_params ['Table'], $ This -> DB); mysql_set_charset ( 'Utf8 ', $ This ->DB );  $ This -> Loglevel = config: getconfig ('Log _ level' );}  Public   Function Logmessage ( $ Msg , $ Log_level = Log : Info, $ Module = Null  ){  If ( $ Log_level >$ This -> Loglevel) Return  ;  $ SQL =" Insert into test ('msg ', module, add_time) values ('{  $ Msg }','{ $ Module } ', Unix_timestamp ())" ;  Mysql_query ( $ SQL , $ This -> DB );}} ?>