How to write PHP errors to stderr?

Question

How can I change php-fpm.conf (or php.ini) so all errors/ warnings/ ... are written to stderr (or alternatively to stdout)?

I run php5-fpm with daemonize = no and want to see all errors in my terminal.

Answer 1

The solution is to set ...

; Redirect worker stdout and stderr into main error log. If not set, stdout and
; stderr will be redirected to /dev/null according to FastCGI specs.
; Note: on highloaded environement, this can cause some delay in the page
; process time (several ms).
; Default Value: no
catch_workers_output = yes

Answer 2

Yes, it is possible without messing with the .ini config.

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Use a Unix descriptor, like one of those example:

php myscript.php 2> errors.log

Or by using a hashbang, file must then be set as executable:

./myscript 2> errors.log

From there all errors will be logged.

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To write only in errors.log, use fwrite anywhere in your php script:

<?php
fwrite(STDERR, "Some debug infos\n");

Appear only in errors.log. Useful when writing fast refreshing scripts.

Notice that all errors are erased when restarting.

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To watch for errors, use tail -f or watch cat

watch cat errors.log

Answer 3

I do not think that you can achieve that, at least in the way I am understanting it from your question.

I wiil propose you a work around to view php through terminal in real time

Step 1 - write all error to a file

change your php.ini file to write every error to file /logs/phpLogs

Step 2 - via error 'real time' using tail

From your command line run the tail command tail -f /logs/phpLogs

Step 3 - Optionally use error_log

User the php error_log command error_log(print_r(debug_backtrace(), true ))

EDIT : (just found it) My anwser is similar to that How to log errors and warnings into a file