为什么在 ubuntu 20 上安装 php7.4 我在控制台中有 php 8？

Question

在 ubuntu 20（aws 服务器）上安装 php7.4 我安装了 php 8。我尝试禁用它并启用 7.4。下面的所有输出命令都显示有效的输出，但是重新启动 apache 无论如何我都有 php8：

ubuntu@ip-172-31-38-186 : ubuntu :~$ cd /etc/php
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ ls -la
total 36
drwxr-xr-x  9 root root 4096 Jul 22 11:28 .
drwxr-xr-x 96 root root 4096 Jul 25 03:59 ..
drwxr-xr-x  3 root root 4096 Jul 22 11:28 5.6
drwxr-xr-x  3 root root 4096 Jul 22 11:28 7.0
drwxr-xr-x  3 root root 4096 Jul 22 11:28 7.1
drwxr-xr-x  3 root root 4096 Jul 22 11:28 7.2
drwxr-xr-x  3 root root 4096 Jul 22 11:28 7.3
drwxr-xr-x  5 root root 4096 Jul 22 11:23 7.4
drwxr-xr-x  5 root root 4096 Jul 22 11:28 8.0
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ uname -a
Linux ip-172-31-38-186 5.8.0-1041-aws #43~20.04.1-Ubuntu SMP Thu Jul 15 11:07:29 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ php -v
PHP 8.0.8 (cli) (built: Jul  1 2021 15:26:46) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.8, Copyright (c) Zend Technologies
    with Zend OPcache v8.0.8, Copyright (c), by Zend Technologies
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ sudo a2dismod php8.0
Module php8.0 already disabled
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ sudo a2dismod php8
ERROR: Module php8 does not exist!
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ sudo a2dismod php8.0.8
ERROR: Module php8.0.8 does not exist!
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ sudo a2enmod php7.4
Considering dependency mpm_prefork for php7.4:
Considering conflict mpm_event for mpm_prefork:
Considering conflict mpm_worker for mpm_prefork:
Module mpm_prefork already enabled
Considering conflict php5 for php7.4:
Module php7.4 already enabled
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ sudo service apache2 restart
ubuntu@ip-172-31-38-186 : ubuntu :/etc/php$ php -v
PHP 8.0.8 (cli) (built: Jul  1 2021 15:26:46) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.8, Copyright (c) Zend Technologies
    with Zend OPcache v8.0.8, Copyright (c), by Zend Technologies

重新启动操作系统没有帮助。如何设置 php 7.4？

谢谢！

Answer 1

请运行以下命令，然后检查 ubuntu 上的 php vrsion 。

1. apt-get install -y software-properties-common
 2. add-apt-repository ppa:ondrej/php -y

 3. apt-get update -y



4. apt-get install -y php7.4 libapache2-mod-php7.4 php7.4-curl php7.4-gmp php7.4-mbstring php7.4-phpdbg php7.4-sqlite3 php7.4-zip php7.4-bcmath php7.4-dba php7.4-imap php7.4-pspell php7.4-sybase php7.4-bz2 php7.4-dev php7.4-interbase php7.4-mysql php7.4-readline php7.4-tidy php7.4-cgi php7.4-enchant php7.4-intl php7.4-odbc php7.4-xml php7.4-cli php7.4-fpm php7.4-json php7.4-opcache php7.4-snmp php7.4-xmlrpc php7.4-common php7.4-gd php7.4-ldap php7.4-pgsql php7.4-soap php7.4-xsl php7.4-mongodb


5.sudo update-alternatives --set php /usr/bin/php7.4

现在检查 php 版本

谢谢