How to solve the problem that php5.6 cannot extend redis.so

With the development of web applications, more and more people are beginning to use PHP to develop high-quality web applications. As a popular server-side scripting language, PHP can be easily integrated with various data storage technologies, such as MySQL, MongoDB, and Redis. However, in the process of using PHP, you may encounter various problems and errors that cause the application to not run properly. One of them is the problem that php5.6 cannot extend redis.so.

First of all, let us understand what Redis is. Redis is a high-performance key-value storage database that can be used to store, read, and operate various types of data, such as strings, hash tables, lists, sets, and ordered sets, etc. It mainly uses memory as the storage medium, making Redis very fast and efficient.

PHP interacts with Redis by extending redis.so or phpredis extension. These extensions provide various API functions so that developers can easily access Redis in PHP code. However, in some versions of PHP, especially php5.6, there are some problems that cause these extensions to not work properly.

If you use the php5.6 version and try to install and use the phpredis extension or directly extend redis.so, you may encounter the following error message:

PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php5.6/modules/redis.so' - /usr/lib64/php5.6/modules/redis.so: undefined symbol: igbinary_serialize in Unknown on line 0

This error message means that you The PHP version does not include the igbinary extension, which is a dependency of the phpredis extension. Igbinary is a PHP serialization and deserialization extension that can improve Redis access speed and performance.

To solve this problem, you need to install the igbinary extension first, and then install the phpredis extension or extend redis.so. Here are the specific steps:

1. Install the igbinary extension
   Download and compile the igbinary extension, and then install it into your PHP extensions directory. You can download igbinary from GitHub:

   $ git clone https://github.com/igbinary/igbinary.git
   $ cd igbinary
   $ phpize
   $ ./configure
   $ make
   $ sudo make install

   After completing the above steps, you need to copy the igbinary.so file to the PHP extension directory and add the following line to the php.ini file:

   extension=igbinary.so

2. Install phpredis extension
   Download and compile the phpredis extension, then install it into your PHP extensions directory. You can download phpredis from GitHub:

   $ git clone https://github.com/phpredis/phpredis.git
   $ cd phpredis
   $ phpize
   $ ./configure
   $ make
   $ sudo make install

   Then, add the following lines in the php.ini file:

   extension=redis.so

3. Extend redis.so
   If you do not want to use the phpredis extension and want to extend redis.so directly, then you need to compile the PHP source code and enable the Redis extension. The following are the specific steps:

First, download the PHP source code and unzip it:

$ wget http://cn2.php.net/distributions/php-5.6.40.tar.gz
$ tar zxvf php-5.6.40.tar.gz
$ cd php-5.6.40

Then, enable the Redis extension in the ./configure command:

$ ./configure --with-redis

Next, use the make command to compile the PHP source code:

$ make

After completing the compilation, copy the redis.so file to the PHP extension directory:

$ sudo cp modules/redis.so /usr/lib64/php5.6/modules/

Finally, add the following to the php.ini file Line:

extension=redis.so

Summary

The problem that php5.6 cannot extend redis.so is caused by the lack of igbinary extension. To solve this problem, you need to install the igbinary extension first, and then install the phpredis extension or extend redis.so. If you want to extend redis.so directly, you need to compile the PHP source code and enable the Redis extension.

During the PHP development process, you may encounter a variety of problems and errors, which require our patience to troubleshoot and solve. However, by mastering and understanding PHP related technologies, we can locate and solve problems faster, making our web applications more complete and efficient.

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