RE: Re[2]: [PHP-DB] Curious if include_once will work better than include
After a 2-second search of the PHP manual... "require() and include() are identical in every way except how they handle failure. include() produces a Warning while require() results in a Fatal Error. In other words, don't hesitate to use require() if you want a missing file to halt processing of the page. include() does not behave this way, the script will continue regardless. Be sure to have an appropriate include_path setting as well." And.. "The include_once() statement includes and evaluates the specified file during the execution of the script. This is a behavior similar to the include() statement, with the only difference being that if the code from a file has already been included, it will not be included again. As the name suggests, it will be included just once." > -Original Message- > From: Mikhail U. Petrov [mailto:[EMAIL PROTECTED] > Sent: Tuesday, April 13, 2004 2:07 PM > To: Eric Girard > Cc: Karen Resplendo; [EMAIL PROTECTED] > Subject: Re[2]: [PHP-DB] Curious if include_once will work better than > include > > > Hi! > Sorry for my offtopic, but by the way, > what's the difference between include/include_once and > require/require_once? > > > Tuesday, April 13, 2004, 10:29:14 PM, Eric wrote: > > >> Curious about "include_once" versus "include". > >> > >> All my connection stuff is in "conn.php3". > >> > >> I am planning on including it at the top of the page like this: > >> include_once "conn.php3"; > >> > >> Now will that speed things up compared to just using a > plain "include". I > >> call $connectionSDWIS(which is in the include) 5 different times? > > EG> IMHO the 'speed' difference between include and > include_once will be > EG> slight, probably with include_once being slower because > of the overhead > EG> needed to keep track of which files have been included > already. But this > EG> isn't really what the question is about. include and > include_once will > EG> not magically optimize the code for you, but if you > include the same file > EG> 20 times that will be more that has to be parsed > needlessly, so if you > EG> can't keep track of your includes or if including a > particular file more > EG> than once will alter the result, than use include_once. Another > EG> alternative is to use require() or require_once() to make > sure that the > EG> file is included. Just my $.02, > > EG> Eric > > > > -- > Best regards, > Mikhail U. Petrov > mailto:[EMAIL PROTECTED] > > -- > PHP Database Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re[2]: [PHP-DB] Curious if include_once will work better than include
Hi! Sorry for my offtopic, but by the way, what's the difference between include/include_once and require/require_once? Tuesday, April 13, 2004, 10:29:14 PM, Eric wrote: >> Curious about "include_once" versus "include". >> >> All my connection stuff is in "conn.php3". >> >> I am planning on including it at the top of the page like this: >> include_once "conn.php3"; >> >> Now will that speed things up compared to just using a plain "include". I >> call $connectionSDWIS(which is in the include) 5 different times? EG> IMHO the 'speed' difference between include and include_once will be EG> slight, probably with include_once being slower because of the overhead EG> needed to keep track of which files have been included already. But this EG> isn't really what the question is about. include and include_once will EG> not magically optimize the code for you, but if you include the same file EG> 20 times that will be more that has to be parsed needlessly, so if you EG> can't keep track of your includes or if including a particular file more EG> than once will alter the result, than use include_once. Another EG> alternative is to use require() or require_once() to make sure that the EG> file is included. Just my $.02, EG> Eric -- Best regards, Mikhail U. Petrov mailto:[EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] Curious if include_once will work better than include
> Curious about "include_once" versus "include". > > All my connection stuff is in "conn.php3". > > I am planning on including it at the top of the page like this: > include_once "conn.php3"; > > Now will that speed things up compared to just using a plain "include". I > call $connectionSDWIS(which is in the include) 5 different times? IMHO the 'speed' difference between include and include_once will be slight, probably with include_once being slower because of the overhead needed to keep track of which files have been included already. But this isn't really what the question is about. include and include_once will not magically optimize the code for you, but if you include the same file 20 times that will be more that has to be parsed needlessly, so if you can't keep track of your includes or if including a particular file more than once will alter the result, than use include_once. Another alternative is to use require() or require_once() to make sure that the file is included. Just my $.02, Eric -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] Curious if include_once will work better than include
Hi! Include_once can't include one file several times. I think if you use include_once PHP see if that file already were included, and don't include it one more time... Maybe difference is time to check this... I don't trust this fact: KR> Now will that speed things up compared to just using a plain "include". I call $connectionSDWIS(which is in the include) 5 different times? -- Best regards, Mikhail U. Petrov mailto:[EMAIL PROTECTED] Tuesday, April 13, 2004, 7:52:10 PM, Karen wrote: KR> Curious about "include_once" versus "include". KR> All my connection stuff is in "conn.php3". KR> I am planning on including it at the top of the page like this: KR> include_once "conn.php3"; KR> Now will that speed things up compared to just using a plain "include". I call $connectionSDWIS(which is in the include) 5 different times? KR> $data = odbc_do($connectionSDWIS,"EXEC sp_SanitarySurveyLatest '$pwsno'"); KR> $data = odbc_do($connectionSDWIS, "Select Distinct CASE ActivityStatus WHEN 'A' THEN 'ACTIVE' WHEN 'I' THEN 'INACTIVE' END + ' ' + CASE Convert(varchar,ActDate,107) WHEN 'May 05, 1955' THEN '' KR> ELSE Convert(varchar,ActDate,107) END As 'ActivityStatus' FROM Inventory Where PWSID='$pwsno'"); KR> $data2 = odbc_do($connectionSDWIS,"Exec sp_EntryPointsWithSourcesAndPWS '$pwsno'"); KR> $data=odbc_do($connectionSDWIS,"SELECT StateID, WSFName, TreatmentProcess, TreatmentObjective FROM Treatments WHERE PWS= '$pwsno' ORDER BY StateID"); KR> $data = odbc_do($connectionSDWIS, "SELECT CalendarYear, convert(varchar(12),ReceivedDate, 107), convert(varchar(12),CertifiedDate, 107) FROM CCRS WHERE PWS='$pwsno' ORDER BY CalendarYear Desc"); KR> - KR> Do you Yahoo!? KR> Yahoo! Small Business $15K Web Design Giveaway - Enter today -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] Curious if include_once will work better than include
My understanding is include_once() called several times in the same page or include files will only be included once. > Curious about "include_once" versus "include". > > All my connection stuff is in "conn.php3". > > I am planning on including it at the top of the page like this: > include_once "conn.php3"; > > Now will that speed things up compared to just using a plain "include". I > call $connectionSDWIS(which is in the include) 5 different times? > > $data = odbc_do($connectionSDWIS,"EXEC sp_SanitarySurveyLatest '$pwsno'"); > $data = odbc_do($connectionSDWIS, "Select Distinct CASE ActivityStatus > WHEN 'A' THEN 'ACTIVE' WHEN 'I' THEN 'INACTIVE' END + ' ' + CASE > Convert(varchar,ActDate,107) WHEN 'May 05, 1955' THEN '' ELSE > Convert(varchar,ActDate,107) END As 'ActivityStatus' FROM Inventory Where > PWSID='$pwsno'"); > $data2 = odbc_do($connectionSDWIS,"Exec sp_EntryPointsWithSourcesAndPWS > '$pwsno'"); > $data=odbc_do($connectionSDWIS,"SELECT StateID, WSFName, TreatmentProcess, > TreatmentObjective FROM Treatments WHERE PWS= '$pwsno' ORDER BY StateID"); > $data = odbc_do($connectionSDWIS, "SELECT CalendarYear, > convert(varchar(12),ReceivedDate, 107), convert(varchar(12),CertifiedDate, > 107) FROM CCRS WHERE PWS='$pwsno' ORDER BY CalendarYear Desc"); -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP-DB] Curious if include_once will work better than include
Curious about "include_once" versus "include". All my connection stuff is in "conn.php3". I am planning on including it at the top of the page like this: include_once "conn.php3"; Now will that speed things up compared to just using a plain "include". I call $connectionSDWIS(which is in the include) 5 different times? $data = odbc_do($connectionSDWIS,"EXEC sp_SanitarySurveyLatest '$pwsno'"); $data = odbc_do($connectionSDWIS, "Select Distinct CASE ActivityStatus WHEN 'A' THEN 'ACTIVE' WHEN 'I' THEN 'INACTIVE' END + ' ' + CASE Convert(varchar,ActDate,107) WHEN 'May 05, 1955' THEN '' ELSE Convert(varchar,ActDate,107) END As 'ActivityStatus' FROM Inventory Where PWSID='$pwsno'"); $data2 = odbc_do($connectionSDWIS,"Exec sp_EntryPointsWithSourcesAndPWS '$pwsno'"); $data=odbc_do($connectionSDWIS,"SELECT StateID, WSFName, TreatmentProcess, TreatmentObjective FROM Treatments WHERE PWS= '$pwsno' ORDER BY StateID"); $data = odbc_do($connectionSDWIS, "SELECT CalendarYear, convert(varchar(12),ReceivedDate, 107), convert(varchar(12),CertifiedDate, 107) FROM CCRS WHERE PWS='$pwsno' ORDER BY CalendarYear Desc"); - Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway - Enter today
