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What is the exact Diff. between include_once() and
require_once() in PHP?
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Answer / arvind pippal
. 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.
include_once() should be used in cases where the same file
might be included and evaluatedmore than once during a
particularexecution of a script, and you want to be sure
that it is included exactly once to avoid problems with
function redefinitions, variable value reassignments, etc.
require_once() should be used in cases where the same file
might be included and evaluatedmore than once during a
particular execution of a script, and you want to be sure
that it is included exactly once to avoid problems with
function redefinitions, variable value reassignments, etc.
| Is This Answer Correct ? | 50 Yes | 12 No |
Answer / devendrarjadav
If the file specified with include_once() is not exist then
system displays warning where in the case of require_once()
system displays Fatal error in the client browsers window.
| Is This Answer Correct ? | 51 Yes | 27 No |
Answer / umapathi
include_once -it file is not exist it displays warning
message
in case of require_once-if the file is not exist it
displays fatal error
| Is This Answer Correct ? | 34 Yes | 18 No |
Answer / rahul anand
when we use require_once then if the file is not existed
then it will show the fetal error and will not execute the
instruction written under the require_once function. In the
case of include_once() if the file does not exist then it
will show the error message and also show the statements
written under the include_once function.
| Is This Answer Correct ? | 16 Yes | 11 No |
Answer / vineet kumar saini
1.include() includes a file in memory no matter if it has
already been loaded
2.include_once() includes a file in memory only if it has
not been loaded already
3.require() includes a file in memory no matter if it has
already been loaded. if the file cannot be loaded, the
script is aborted
4.require_once() does the same as require(), but only if the
file hasn't been included yet. if the file's already in
memory, it has no effect.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / basha
include_once -it file is not exist it displays warning
message and continue the program
in case of require_once-if the file is not exist it
displays fatal error and terminate the prgram
| Is This Answer Correct ? | 21 Yes | 21 No |
Answer / senthil
in include_once display the warning message if the
containing file is not exist but require_once function
could not diplay the warning message it's a FATAL ERRor in
that time ...
| Is This Answer Correct ? | 4 Yes | 4 No |
Answer / izhar aazmi
Include => Include the said file during execution...
Require => Require the said file for the execution...
As in english "require" mandatory inclusion is expected and
hence, on failure execution shall halt with fatal error...
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / kedar haldikar
If the file specified with include_once() is not exist then
system displays warning where in the case of require_once()
system displays Fatal error in the client browsers window.
| Is This Answer Correct ? | 4 Yes | 9 No |
Answer / maish
both include external file accept
there is failer i smajor difference
in inclde give warning after failure and in requre
give fatal error stop execution file
| Is This Answer Correct ? | 6 Yes | 13 No |
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