RE: [PHP] Require() vs Include()

Ok, Require will always add in the file even if its not executed. Eg if (isset($includeme)) { require ("xxx.php"); } require will be included in the file parsed by php but the following will not get included in the file if $includeme is not set. if (isset($includeme)) { include ("xxx.php"); } An important note about how this works is that when a file is include()ed or require()ed, parsing drops out of PHP mode and into HTML mode at the beginning of the target file, and resumes PHP mode again at the end. For this reason, any code inside the target file which should be executed as PHP code must be enclosed within valid PHP start and end tags. Unlike include(), require() will always read in the target file, even if the line it's on never executes. If you want to conditionally include a file, use include(). The conditional statement won't affect the require(). However, if the line on which the require() occurs is not executed, neither will any of the code in the target file be executed. The manual is actually pretty good on this topic imho. http://www.php.net/manual/function.require.php -----Original Message----- From: Maxim Maletsky [mailto:maxim.maletsky@japaninc.net] Sent: November 14, 2000 12:34 PM To: 'Lawrence.Sheed@dfait-maeci.gc.ca' Cc: 'PHP General List. (E-mail)' Subject: RE: [PHP] Require() vs Include() Well, with include() if an included file does not exists it WILL fail. so where's the difference? -----Original Message----- From: Lawrence.Sheed@dfait-maeci.gc.ca [mailto:Lawrence.Sheed@dfait-maeci.gc.ca] Sent: Tuesday, November 14, 2000 1:26 PM To: Maxim Maletsky Subject: RE: [PHP] Require() vs Include() include won't fail out if the includes not there, but require will. If you have something that *has* to be in there, then require is used, if something could be optional - eg a generated header or something than might be or might not be there at a given time, use include. -----Original Message----- From: Maxim Maletsky [mailto:maxim.maletsky@japaninc.net] Sent: November 14, 2000 12:21 PM To: 'PHP General List. (E-mail)' Subject: [PHP] Require() vs Include() Hi, A tiny question: why to use require() when include() works just as well and even better when there are some conditions like if{} ? I ask it because although I read many articles on this issue I found no reason for myself to use require() instead of include() and I have driven some huge projects in PHP. Why do I see these hardcore PHP gurus writing PHPLIB, mySQLadmin and examples in their articles using require() where include() would fit just as perfect? WHERE THE TRIIIICK? It escapes from me ... Thanks. Maxim Maletsky - maxim@j-door.com <mailto:maxim@j-door.com> Webmaster, J-Door.com / J@pan Inc. LINC Media, Inc. TEL: 03-3499-2175 x 1271 FAX: 03-3499-3109 http://www.j-door.com <http://www.j-door.com/> http://www.japaninc.net <http://www.japaninc.net/> http://www.lincmedia.co.jp <http://www.lincmedia.co.jp/>