php报错：PHP Startup Unable to load dynamic library

今天遇到使用php命令运行文件报错，提示：PHP Startup: Unable to load dynamic ，于是网上找了好多资料，终于解决，记录如下，以便日后查阅。

报错内容如下：

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/redis.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/redis.so: undefined symbol: zend_ce_exception in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/memcached.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/memcached.so: undefined symbol: zend_hash_str_del in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/swoole.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/swoole.so: undefined symbol: zend_hash_str_del in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/curl.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/curl.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/dom.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/dom.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/fileinfo.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/fileinfo.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/json.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/json.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/phar.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/phar.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/posix.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/posix.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/sysvmsg.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/sysvmsg.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/sysvsem.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/sysvsem.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/sysvshm.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/sysvshm.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/wddx.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/wddx.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/xmlreader.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/xmlreader.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/xmlwriter.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/xmlwriter.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/xsl.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/xsl.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/zip.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/zip.so: cannot open shared object file: No such file or directory in Unknown on line 0

解决方法：
将/etc/php.d/目录下的.ini文件全部重命名为.so文件

如：cp /etc/php.d/zip.ini /etc/php.d/zip.so

按照以上方法处理完之后，还是有三个警告：

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/redis.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/redis.so: undefined symbol: zend_ce_exception in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/memcached.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/memcached.so: undefined symbol: zend_hash_str_del in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/swoole.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/swoole.so: undefined symbol: zend_hash_str_del in Unknown on line 0

原来是这三个扩展被重复加载了，打开php.ini文件，注释扩展加载的地方即可

vi /etc/php.ini # 将redis、memcache、swoo加载的地方注释即可
/etc/init.d/php-fpm restart