Description:
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According to documentation, most opcache directives are PHP_INI_SYSTEM so they should be changeable on httpd.conf (php_value et all).

I was trying to update opcache.error_log with php_value but the value set in php.ini is the one outputed by opcache_get_configuration() is the one being used. I tested updating a few other opcache PHP_INI_SYSTEM directives with no success — only opcache.enable worked.

Test script:
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in php.ini:

opcache.error_log=/var/log/php.log


apache configuration:

php_value opcache.error_log "/var/www/example.com/log/php.log"

Expected result:
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opcache_get_configuration() should show:

opcache.error_log = "/var/www/www.postcrossing.com/log/php.log"

Actual result:
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opcache_get_configuration() shows:

opcache.error_log=/var/log/php.log