opcache.interned_strings_buffer

INI • INI default value changed in 7.1

opcache: opcache.interned_strings_buffer — The amount of memory for interned strings in Mbytes.

Default value 8
Development value 8
Production value 8

Modifiability: INI_SYSTEM - The opcache.interned_strings_buffer INI directive directive is a system-directive, and can only be configured in php.ini files or Server-API configuration files such as Apache httpd.conf. It cannot be configured with ini_set calls.

PHP 5.3-5.4
PHP 5.5
Added
PHP 5.6
PHP 7
PHP 8.0
PHP 8.1-8.2
PHP 8.3
PHP 8.4
PHP 8.5
PHP 8.6 
[opcache]
opcache.interned_strings_buffer = 8

Changes to the opcache.interned_strings_buffer INI

PHP 7.1

  • INI directive default value changed from 4 to 8

PHP 5.5

  • INI directive added

opcache.interned_strings_buffer INI Availability

PHP VersionAvailability
PHP 8.6Future Release Yes
PHP 8.5Upcoming Release Yes
PHP 8.4Supported (Latest) Yes
PHP 8.3Supported Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Security-Fixes Only Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported No
PHP 5.3Unsupported No