require, require_once, include: which and why?


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Syntax: [ Download ] [ Hide ]Syntax: [ Download ] [ Show ][Mon Mar
31 11:07:25 2014] [error] [client 180.76.5.27] PHP
Notice:  Constant DBHOST already defined in
/var/www/vhosts/site.co.uk/httpdocs/dbconn.php on line 9
[Mon
Mar 31 11:07:25 2014] [error] [client 180.76.5.27]
PHP Notice:  Constant DBUSER already defined in
/var/www/vhosts/site.co.uk/httpdocs/dbconn.php on line 10 />[Mon Mar 31 11:07:25 2014] [error] [client
180.76.5.27] PHP Notice:  Constant DBPASS already defined in
/var/www/vhosts/site.co.uk/httpdocs/dbconn.php on line 11 />[Mon Mar 31 11:07:25 2014] [error] &
I have two files A & B.
All the files are linked. In file A,
I have require_once(filename.php). In file B i have
require(filename.php). For some reason this causes some conflict when
running the code. There is code in File A that usually runs, but
doesnt when the above is the case. Any idea why? Thanks.
PHP
I'm using require_once() method, and I need to load a lot of files,
but depending by case, I load certain php file, not all at once. I'm
trying to speed up my application, and I'm wondering if I can put all
of them into php.ini file as auto prepend files.
Question : Does
auto prepend file do the same as requre() does?I'm speaking about
performances. Precisely, if I put
auto prepend file
/Files/file1.php
auto prepend file /Files/file2.php
auto
prepend file /Files/file3.php
auto prepend file
/Files/file4.php
is it same as (time to get those files, or auto
prepend files add them on start of webserver)
require
/Files/file1.php
require /Files/f
PHP
Syntax: [ Download ] [ Hide ]Syntax: [ Download ] [ Show ][Mon Mar
31 11:07:25 2014] [error] [client 180.76.5.27] PHP
Notice:  Constant DBHOST already defined in
/var/www/vhosts/site.co.uk/httpdocs/dbconn.php on line 9
[Mon
Mar 31 11:07:25 2014] [error] [client 180.76.5.27]
PHP Notice:  Constant DBUSER already defined in
/var/www/vhosts/site.co.uk/httpdocs/dbconn.php on line 10 />[Mon Mar 31 11:07:25 2014] [error] [client
180.76.5.27] PHP Notice:  Constant DBPASS already defined in
/var/www/vhosts/site.co.uk/httpdocs/dbconn.php on line 11 />[Mon Mar 31 11:07:25 2014] [error] &
Databases

Difference between require() and require_once(): require() includes
and evaluates a specific file, while require_once() does that only if
it has not been included before (on the same page). So, require_once()
is recommended to use when you want to include a file where you have a
lot of functions for example. This way you make sure you don't include
the file more times and you will not get the "function re-declared"
error. Difference between require() and include() is that require()
produces a FATAL ERROR if the file you want to include is not found,
while include() only produces a WARNING. There is also include_once()
which is the same as include(), but the difference between them is the

PHP

what kind of error is this? my page was just running fine. i did
not change anything neither the location of the requested file.


Warning: require_once(../php/main.php) [function.require-once]:
failed to open stream: No such file or directory
in.................... line 7

Fatal error: require_once()
[function.require]: Failed opening required '../php/main.php'
(include_path='.;C:php5pear') in..........................line 7.

PHP

the difference between require and require_once,i just want to know
the difference rather
than Warning and Fatal Error in php.

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