Let's talk about the problem that the phpredis extension cannot be installed

As a PHP developer, you may often encounter some strange problems, one of which is the failure to install the phpredis extension. Sometimes we may really want to use this extension, but we install it over and over again, but the result is that it never installs. Today we will talk about the solution to this problem.

What is phpredis extension

First of all, let’s understand what this extension is.

phpredis The extension is the Redis official PHP client program, which provides a set of PHP functions that can be used to operate Redis. When using the phpredis extension, you can give full play to its high performance and low latency features whether in a multi-threaded environment or a Web environment. Let us better use Redis to improve system performance and experience.

Using phpredis allows us to directly use PHP to operate Redis, and is compatible with all PHP frameworks. Moreover, phpredis is faster than the phpredisent extension, which is why everyone is more willing to use phpredis instead of phpredisent.

The reason why the phpredis extension cannot be installed

When installing the phpredis extension, we sometimes encounter some problems, such as being unable to download files, etc., but the most frustrating thing is The troublesome thing is that the extension cannot be installed.

This problem may have many reasons. Here are some possible reasons:

1. phpredisThe version is too old or too new and does not support our PHP version ;
2. The PHP environment and compilation parameters are incorrect;
3. Some necessary components or libraries are missing;
4. The PHP installation path is missing.

Because the phpredis extension is related to our operating system, PHP version, application environment, etc., it is very likely that there will be problems with installation in different environments.

So, in order to solve this problem, we need to investigate and solve some of the above reasons.

Solution to the problem that the phpredis extension cannot be installed

Option 1: Check the phpredis version

First, we need to confirm the version of the phpredis extension we installed . We can check the latest version on the official website, and then download the extension corresponding to our PHP version. After downloading, it is best to confirm whether the file we downloaded is complete. If the download fails or some files are missing, we need to download and install again.

Option 2: Confirm the PHP environment and compilation parameters

We need to check whether the PHP environment and compilation parameters are correct. In order to ensure that our PHP environment can work properly, we need to check the PHP compilation parameters and related dependent libraries, etc. phpredisThe extension requires some specific compilation parameters to compile and function correctly.

If there is a problem with installation, it is possible that our compilation parameters are wrong, and we need to uninstall the old version and recompile PHP. When setting compilation parameters, we should pay special attention to whether the --enable-maintainer-zts, --with-php-config and other parameters are correct. Setting these parameters incorrectly can cause our extension to not work properly or run slowly.

Option 3: Install necessary components and libraries

We need to confirm whether some necessary components or libraries are missing, such as libevent, hiredis, openssl, etc. We can first execute in the terminal command line:

$ apt-get install libevent-dev tcl
$ apt-get install git

Then, we check again whether the phpredis extension can be successfully installed. After we confirm that some necessary components and libraries are missing, we need to install them. If our system has some libraries installed, we can check their versions through the following command:

$ dpkg -s libevent-dev | grep Version

Then, we can install the missing libraries through the following command:

$ apt-get install libevent-dev

If it is missing The library cannot be solved through the apt-get package management tool. We may have to spend some effort to compile and install the required dependent libraries from the source code.

Option 4: Check the PHP installation path

Finally, we need to confirm whether the PHP installation path is missing. Normally, the installation path of PHP is /usr/local/php/* or /usr/local/php7/*, etc. We can check the PHP installation path of the current system, and then modify and configure it in the configuration file.

After we can confirm that there are no problems with the PHP installation path and extension path, we can easily install the phpredis extension.

Summary

The above is the method to solve the problem that phpredis extension cannot be installed. This problem may have different manifestations due to different environments, and different methods need to be adopted for different situations. plan. You can also update the phpredis extension frequently, so that it can always be kept up-to-date and may avoid unnecessary problems.

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