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

Question

I try to upgrade php to 8.0.1 when I finish install php and I find like that. How can I do ?

[root@localhost /]# php -v

PHP Warning: PHP Startup: Unable to load dynamic library 'redis.so' (tried: /usr/lib64/php/modules/redis.so (/usr/lib64/php/modules/redis.so: undefined symbol: _zval_ptr_dtor), /usr/lib64/php/modules/redis.so.so (/usr/lib64/php/modules/redis.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0

PHP 8.0.1 (cli) (built: Jan 5 2021 13:54:54) ( NTS gcc x86_64 ) Copyright (c) The PHP Group Zend Engine v4.0.1, Copyright (c) Zend Technologies with Xdebug v3.0.2, Copyright (c) 2002-2021, by Derick Rethans

os: Centos 7

First question, is redis.so there to be loaded in any of the places PHP is looking? Second Question: If not is it somewhere else? — RiggsFolly
– RiggsFolly, Commented Jan 26, 2021 at 13:24
3. redis server is running "[root@localhost /]# sudo systemctl status redis ● redis.service - redis-server Loaded: loaded (/etc/systemd/system/redis.service; enabled; vendor preset: disabled) Drop-In: /etc/systemd/system/redis.service.d └─limit.conf Active: active (running) since" — Daniel0909
– Daniel0909, Commented Jan 26, 2021 at 14:32

Daniel0909 · Accepted Answer · 2021-01-26 23:06:49Z

0

I remove redis from centos 7.I'm not sure 100% correct but I didn't see "PHP Warning:".

[root@localhost ~]# sudo yum remove redisp

[root@localhost local]# rm -R redis

[root@localhost local]# cd /usr/lib64/php/modules

[root@localhost modules]# rm redis.so

[root@localhost modules]# cd /etc/php.d/

[root@localhost php.d]# rm redis.ini"

[root@localhost php.d]# php -v PHP 8.0.1 (cli) (built: Jan 5 2021 13:54:54) ( NTS gcc x86_64 ) Copyright (c) The PHP Group Zend Engine v4.0.1, Copyright (c) Zend Technologies with Xdebug v3.0.2, Copyright (c) 2002-2021, by Derick Rethans

answered Jan 26, 2021 at 23:06

Daniel0909

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Corey · Accepted Answer · 2024-01-10 05:52:00Z

0

You possibly got this issue.

Redis extension must be loaded after json extension.

Look back to the answer you left above, the PHP warning was gone after you removed /etc/php.d/redis.ini, the point is that PHP configuration files are usually loaded in alphanumeric order. Therefore, in the scenario you described, redis.ini would be loaded before 20-json.ini which causes the issue @remicollet mentioned.

So what I recommend you do is to rename redis.ini to 50-redis.ini and restart PHP-related services.

answered Jan 10, 2024 at 5:52

Corey

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