PHP - why fopen() does not work in the registered "register_shutdown_function"?

Question

the fopen() fails and it outputs

Warning: fopen(logs/response_rowbody/230.mlog): failed to open stream: No such file or directory in C:\xampp\htdocs\test.php on line 5

after hours of isolating the reasons that might be causing the problem, I found it is because the function is called in function registered with register_shutdown_function . and I don't know if this is normal or not!

this is the code that I use

this code works

the file C:\xampp\htdocs\test.php

<?php
//register_shutdown_function('logresponse'); 
/*the function logresponse() works here because it has been called naturaly at the end of the file without being shut_down_registered*/
logresponse();
function logresponse(){
   $response_rowbody = "logs/response_rowbody/230.mlog";
   $fhandle = fopen($response_rowbody,"wb");if(!$fhandle){echo"errorrr";};
exit;};
?>

this code does not work

the file C:\xampp\htdocs\test.php

<?php
register_shutdown_function('logresponse'); 
/*the function logresponse() does NOT work here because it has been called as a shut-down registered function*/
//logresponse();
function logresponse(){
   $response_rowbody = "logs/response_rowbody/230.mlog";
   $fhandle = fopen($response_rowbody,"wb");if(!$fhandle){echo"errorrr";};
exit;};
?>

what am I doing wrong here?? thanks.

On the Windows platform, be careful to escape any backslashes used in the path to the file, or use forward slashes. — Patrick Mlr, Sep 06 '16 at 07:21
@PatrickMlr thanks for your interest. but I don't think this is the problem in my case because the same file path works in the first code(without `register_shutdown_function`) — Accountant م, Sep 06 '16 at 07:25
Maybe you have to adjust the path to a static path. Like `c:\\folder\\resource.txt` — Patrick Mlr, Sep 06 '16 at 07:28
@PatrickMlr thanks. absolute path worked in the both examples!! but why? — Accountant م, Sep 06 '16 at 08:28
I'll write an answer, so other can see that you got it. Just remember to accept it. — Patrick Mlr, Sep 06 '16 at 08:31

score 1 · Answer 1 · answered Sep 06 '16 at 08:35

1

From the manual:

Working directory of the script can change inside the shutdown function under some web servers, e.g. Apache.

That means you cannot trust relative paths. Use absolute paths instead.

answered Sep 06 '16 at 08:35

Álvaro González

142,137
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score -1 · Accepted Answer · answered Sep 06 '16 at 08:31

-1

Maybe you have to adjust the path to a static path. Like c:\\folder\\resource.txt

answered Sep 06 '16 at 08:31

Patrick Mlr

2,955
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PHP - why fopen() does not work in the registered "register_shutdown_function"?

this code works

this code does not work

2 Answers2