PHP Warning: PHP Startup: Unable to load dynamic library 'posix.so'...

出问题的提示: PHP Warning: PHP Startup: Unable to load dynamic library 'posix.so' (tried: /usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/posix.so (/usr/local/php/lib/php/extensions/no-debug-n

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