PHP version 7.1.25, server CentOS 7, follow the link to install the amqp extension (your own rabbitmq-c version is 1.8.0 rel= apmq version 1.9.4). After restarting the service, enter [php-m] to prompt [PHP Warning: PHP Startup: Unable to load dynamic library"/ usr/lib64/php/modules/amqp.so"-/ usr/lib64/php/modules/amqp.so: undefined symbol: amqp_ssl_socket_set_verify_hostname in Unknown on line 0]