This is a suggestion of compilation directive to use when compiling PHP specifically for the audited code.
The selection made below is based on the extension usage, found in the code (--enable, --with) and also the absence of usage (--disable, --without).
Some local extensions (--pdo-mysql, --with-libmbfl...) are also mentionned for help.
# install one extra extension
#pecl install xdebug (https://pecl.php.net/package/xdebug)
;;;;;;;;;;;;;;;;;;;;;;;;
; PHP configure list ;
;;;;;;;;;;;;;;;;;;;;;;;;
./configure
--with-curl=DIR
--enable-fpm
--with-fpm-user
--with-fpm-group
--with-fpm-systemd
--with-fpm-acl
--without-iconv
--with-ldap[=DIR]
--with-ldap-sasl[=DIR]
--disable-libxml
--enable-mbstring
--with-libmbfl=DIR
--enable-mbstr-enc-trans
--disable-mbregex
--with-mcrypt=[DIR]
--with-openssl[=DIR]
--disable-pdo
--without-pear
--with-pgsql=[DIR]
--disable-posix
--enable-soap
--without-sqlite3
--with-xdebug
--disable-xml
--with-xmlrpc[=DIR]
--with-zlib=DIR
; For debug purposes
;--enable-dtrace
;--disable-phpdbg
;--enable-zend-signals
;--disable-opcache