php - SQLite Alternatives -

i looking alternative sqlite. have application has lighttpd built , serves php scripts interact multiple instances of application. architectural questions aside, reason, person wrote chose use sqlite database php scripts -- store , retrieve information scripts themselves. such, appears have locking issues. deal programmer used stuff this:

$executed = $storedb->exec($updatesql); while($executed === false && $i<10) {     $storedb->close();     $storedb = new sqlite3('c:/path/path2/lighttpd/store.db');     $pragmadb = "pragma journal_mode=wal";     ($storedb->exec($pragmadb));     $executed = $storedb->exec($updatesql);     $i++; }        

i understand why sqlite chosen can copied on , over, not need installed server, , small. however, multiple instances of application hitting php scripts, concurrently, can see causing problems: information retrieval operations fail , data not updated. warnings in log this.

an update statement

[07-mar-2015 21:03:44 utc] php warning:  sqlite3::exec(): database locked in c:\path\path2\lighttpd\htdocs\processrequest.php on line 194 

and

a select statement

[07-mar-2015 21:22:25 utc] php warning:  sqlite3::query(): unable prepare statement: 5, database locked in c:\path\path2\lighttpd\htdocs\processrequest.php on line 151 

i of ask, have comparable alternatives sqlite situation? listed reasons chosen begin with, primary need able copied, though can around if necessary.

if can afford wait lock clear, can use sqlite busy timeout.