最近在學PHP，需要搭建LAMP，但是自己的機器是Macbook，爲了學習就在上面搭建，經理很曲折。
一、環境搭建
1、硬件：macbook air（2013年）i5
2、系統：macos majave 10.14
3、軟件：
apache：Apache/2.4.34 (Unix)---系統自帶；
mysql：8.0.19 下載地址：https://dev.mysql.com/downloads/mysql/
workbench：8.0.19 下載地址：https://dev.mysql.com/downloads/workbench/ （workbench是mysql操作數據庫的界面環境，一定要注意版本一致，之前用的不一致的版本就是連不上數據庫，惱怒的好幾天！ ）
PHP：版本爲7.1.19 。macbook上會默認安裝php，通過設置/etc/apache2/httpd.conf文件，#LoadModule php7_module libexec/apache2/libphp7.so的語句中刪除“#”，重新運行sudo apachectl restart即可。
phpmyadmin：4.8.3多國語言版本 https://www.phpmyadmin.net/files/4.8.3/，下載後解壓，放到/Library/WebServer/Documents（apache發佈網站的位置）目錄下，文件夾命名爲phpmyadmin。
備註：macos系統比較好的是可以利用命令行，與linux系統部分程序兼容，可以通過brew clone 操作進行下載，有興趣的人可以百度一下。
二、遇坑解決方案
1、收件解決就是workbench連接數據庫問題，一方面，版本不一致，修改後還是不行，具體錯誤找不到，但是記得添加了 /private/etc/my.cnf文件，內容如下：
[client]
default-character-set=utf8
#password =root password
port = 3306
socket = /tmp/mysql.sock
# Here follows entries for some specific programs
# The MySQL server
[mysqld]
character-set-server=utf8
init_connect='SET NAMES utf8
port = 3306
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
character-set-server=utf8
init_connect='SET NAMES utf8'
# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking
# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin
# binary logging format - mixed recommended
binlog_format=mixed
# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1
# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
# where you replace <host>, <user>, <password> by quoted strings and
# <port> by the master's port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
# MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables' values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id = 2
#
# The replication master for this slave - required
#master-host = <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user = <username>
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
default-character-set=utf8
[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
在設置裏找到的mysql，點擊configuration，在configuration中選擇/private/etc/my.cnf，然後重啓mysql。
2、php連接數據庫問題，在/Library/WebServer/Documents文件夾下新建index.php文件編程測試連接mysql情況，代碼如何如下：
<?php
$con = mysqli_connect("localhost","root","qwertyuiop","test");
//測試是否連接數據庫
if($con){
echo "連接成功";
}
else{
echo "連接失敗 ";
}
?>
通過火狐輸入localhost/index.php結果報錯mysqli_connect連接有問題
在網上查了一下，說是本地socket設置與默認的不一樣，導致php無法找到mysql的socket文件。根據網上提供的方法，需要做如下操作。
首先，在MySQL中用status查看數據庫狀態，如下所示：
其中，標紅的部分是我們需要的。然後打開php.ini文件，需要將mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket的值設置爲標紅後面的那個目錄。重啓apache服務器，後續info.php工作正常，MySQL的版本信息能夠正常顯示了。（php.ini不找不到，把/private/ect/php.ini.default 文件複製後，去掉.default即可）。
3、phpmyadmin設置問題，通過火狐輸入：localhost/phpmyadmin/進入phpmyadmin登錄界面，直接輸入用戶名密碼，結果報錯
mysqli_real_connect(): The server requested authentication method unknown to the client
是由於新版本的mysql賬號密碼解鎖機制不一致導致的
解決辦法：
打開終端，輸入mysql -uroot -p，在輸入密碼，進入mysql操作界面。
輸入use mysql;
再輸入 ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密碼';
即可。
好了！大事搞定！可以測試php連接數據庫了！心塞了好幾天！！