What to do if there is no extension in php

There is no extension in php because the supported libraries are set to "enable" during compilation. The solution is to add the parameter "--with-config-file-scan-dir=/etc/php" .d" is enough.

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php There is no extension in php.ini

Today I took a look at the php configuration in centOS

vim /etc/php.ini

I found that there is no extension=

configuration, even if there is; it is commented out

php -i found that

Loaded Configuration File => /etc/php.ini
Scan this dir for additional .ini files => /etc/php.d
Additional .ini files parsed => /etc/php.d/bz2.ini,
/etc/php.d/calendar.ini,
/etc/php.d/ctype.ini,
/etc/php.d/curl.ini,
/etc/php.d/dom.ini,
/etc/php.d/exif.ini,
/etc/php.d/fileinfo.ini,
/etc/php.d/ftp.ini,
/etc/php.d/gd.ini,
/etc/php.d/gettext.ini,
/etc/php.d/gmp.ini,
/etc/php.d/iconv.ini,
/etc/php.d/json.ini,
/etc/php.d/mbstring.ini,
/etc/php.d/mysqli.ini,
/etc/php.d/pdo.ini,
/etc/php.d/pdo_mysql.ini,
/etc/php.d/pdo_sqlite.ini,
/etc/php.d/phar.ini,
/etc/php.d/shmop.ini,
/etc/php.d/simplexml.ini,
/etc/php.d/sockets.ini,
/etc/php.d/sqlite3.ini,
/etc/php.d/tokenizer.ini,
/etc/php.d/xml.ini,
/etc/php.d/xml_wddx.ini,
/etc/php.d/xmlreader.ini,
/etc/php.d/xmlwriter.ini,
/etc/php.d/xsl.ini,
/etc/php.d/zip.ini

was originally loaded from /etc/php.d. When compiling php, add the parameter --with-config-file-scan-dir=/etc/php.d, because it is not The downloaded source code is compiled and installed directly with php7.2, so this parameter should be carried by default.

So php will actively search for all ini configuration files in scan-dir other than php.ini.

Libraries that are supported during compilation are generally set to enable because they can be found in /etc/php.d. Without this parameter, Scan this dir for additional .ini files will be empty. Various libraries will not be automatically loaded. You need to add

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