Requests sometimes report an error: undefined symbol: igbinary_serialize

under PHP 5.6.37 ubuntu14.04.1, sometimes the request will report this error: PHP Startup: Unable to load dynamic library"/ usr/lib/php/20131226/redis.so"-/ usr/lib/php/20131226/redis.so: undefined symbol: igbinary_serialize,.

Dec.23,2021

reinstall the phpredis extension


php-igbinary

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