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Check whether a PHP extension is loaded

harmlessPHPalle
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user@server
php -m | grep -i imagick

Lists all loaded PHP and Zend modules and filters for the given name. If there is no output, the extension is not active for this PHP binary. Useful when an application or WordPress Site Health reports a missing extension.

Note: For a Plesk PHP version, use the full path, for example /opt/plesk/php/8.3/bin/php -m. CLI and FPM sometimes load different ini files.

Also searched as

  • check if php module is installed
  • missing php extension
  • is imagick enabled

Related one-liners

All in PHP

Check all PHP files in a directory for syntax errors

$find /var/www/vhosts/example.com/httpdocs/wp-content/themes -name '*.php' -exec php -l {} \; 2>&1 | grep -v '^No syntax errors'
harmlessPHP

Check Composer packages for known vulnerabilities

$composer audit --working-dir=/var/www/vhosts/example.com/httpdocs
harmlessPHP

Check PHP OPcache settings

$php -i | grep -E '^opcache\.(enable|enable_cli|memory_consumption|max_accelerated_files|validate_timestamps|revalidate_freq) '
harmlessPHP

Check the current value of a PHP setting

$php -i | grep -i memory_limit
harmlessPHP

Count PHP-FPM processes per pool

$ps -eo args | grep '[p]hp-fpm: pool' | awk '{print $NF}' | sort | uniq -c | sort -rn
harmlessPHP

Install Composer dependencies for production

$composer install --no-dev --optimize-autoloader --working-dir=/var/www/vhosts/example.com/httpdocs
cautionPHP

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