phpredis extension doesn't work, unable to load 'redis.so'

Question

I installed nginx, php, php-fpm, php-pecl-redis by yum.

All of them work but the last one.

When I run /usr/sbin/php-fpm, I got this:

PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/redis.so' - /usr/lib/php/modules/redis.so: undefined symbol: igbinary_unserialize in Unknown on line 0

I don't know what igbnary_unserialize means and how to fix it.

I checked the redis.so file under right path. I add extension=redis.so to php.ini

PHP version: 5.3.3

PhpRedis version: 2.2.7

@BobvanLuijt I can get phpinfo(),If you mean that. But I still can not find reids info that page — pearzl
– pearzl, Commented Nov 30, 2015 at 12:18

Matthew Setter · Accepted Answer · 2017-05-19 07:36:46Z

35

I had the same issue. I'm on Ubuntu 16.04 LTS. Running sudo apt-get install php-igbinary resolved the issue for me. I have other issues, but that's what solved this one.

answered May 19, 2017 at 7:36

Matthew Setter

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5 Comments

Ninad Ajnikar Over a year ago

After upgrading from php7.0 to 7.1, redis was not working for me.. was scratching my head and doing all stuff said on diff forums ...finally this worked..Thanks Matt!

Aftab Naveed Over a year ago

After upgrading to php 7.2 I was having the same issue that fixed it for me. Thank you.

Mihail Minkov Over a year ago

This should be the answer :)

Skalli Over a year ago

Same for me when updating to php7.3 (from 7.0) for an update of Nextcloud (15->16). (Linux Mint Debian Edition).

David Okwii Over a year ago

Meanwhile, there's no version for php 7.4; The following additional packages will be installed: php5.6-igbinary php7.0-igbinary php7.1-igbinary php7.2-igbinary php7.3-igbinary php8.0-igbinary

Someone Special · Accepted Answer · 2020-05-01 07:35:01Z

17

For people who are upgrading their php from 7.0 to 7.4 like me, and not able to get php-redis working. These are the steps I used after following the answers above.

1) remove Redis

sudo apt purge php-redis

2) Install Igbinary

sudo apt-get install php-igbinary

3) Install php-redis again

sudo apt-get install php-redis

I did the steps above because it seems only php7.0 is recognising the php-redis install but not the currently enabled php7.4

I also recommend removing other versions of PHP if you have should your problem continue unsolved.

answered May 1, 2020 at 7:35

Someone Special

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1 Comment

C-Spydo Over a year ago

Straight up accurate answer.

AnonymousDev · Accepted Answer · 2024-12-04 13:21:28Z

3

On Ubuntu 20 and PHP 7.4 I did this and it worked :

sudo apt purge php-redis 
sudo apt install php-redis php7.4-redis

To test the Redis server:

php --ri redis

or

redis-cli ping
redis-cli info stats

edited Dec 4, 2024 at 13:21

AnonymousDev

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answered Jan 7, 2022 at 4:57

Thoutmos Sanebankh

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Comments

Bob van Luijt · Accepted Answer · 2015-11-30 11:02:40Z

2

Probably an issue with igbinary, is this installed? (try for example: cat /etc/php.d/igbinary.ini).

Here you can find and install igbinary

answered Nov 30, 2015 at 11:02

Bob van Luijt

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4 Comments

Bob van Luijt Over a year ago

What is the outcome of php_info()?

pearzl Over a year ago

is php_info() a correct function? I got 500 err after insert that.

Bob van Luijt Over a year ago

What if you -in terminal- type: php php_info();

pearzl Over a year ago

~O~，but i got the same message like in broswer.I'm going to reinstall the environment

James M · Accepted Answer · 2019-06-21 09:06:32Z

2

Related to this bug https://bugs.launchpad.net/ubuntu/+source/php-redis/+bug/1762935

You should remove php-redis from packages: apt purge php-redis , and install it via pecl install redis

You should add "extension=redis.so" to php.ini

and remove redis from config.d in your php directory:

rm /etc/php/7.2/fpm/conf.d/@20-redis.ini

and

rm /etc/php/7.2/cli/conf.d/@20-redis.ini

restart php fpm and you will see that problem solved

answered Jun 21, 2019 at 9:06

James M

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Sylar Li · Accepted Answer · 2016-08-28 16:04:53Z

1

just resolve the same problem:

php-pecl-redis installed by yum will cause this problem. so you need to install the php-redis manually. wget the package and phpize - configure - make ....

answered Aug 28, 2016 at 16:04

Sylar Li

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