php添加pdo_mysql.so的扩展

1. 首先进入你下载的php的安装包里找到pdo_mysql文件夹。

/usr/local/php-7.3./ext/pdo_mysql

ps：有些教程说从http://pecl.php.net/这个网站上下载pdo_mysql扩展，然后再编译安装。唉，兄弟啊，这个东西社区都不维护了，你还从上面下载个球球啊！！！！

大家一定要避免这个坑啊！！！！！

2. 执行phpize。

这里要注意，你要使用自己要添加扩展的php的phpize。什么意思呢？比如说你有php7 和 php7.3两个php版本，你要把扩展添加进7php7.3，那么你就需要使用php7.3的扩展，怎么使用呢？自行百度吧。

phpize是用来扩展php扩展模块的，通过phpize可以建立php的外挂模块

3. 配置扩展信息

./configure --with-php-config=/usr/local/php/bin/php-config // 这样是不行的！！！！！

./configure --with-php-config=/usr/local/php/bin/php-config --with-pdo-mysql=/usr/local/mysql （php的安装路径，也就是php的可执行文件）

4. 编译和安装

make & make install

5. 修改php.ini文件

增加extension=pdo_mysql.so;

6. 重启php-fpm

sudo kill -USR2 进程号

遇到问题及解决方法：

1. nginx的错误日志

[error] 6910#6910: *1278203 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 218.107.211.81, server: caojiangjiang.qhrm.chunmiantest.qufenqi.com, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9800", host: "caojiangjiang.qhrm.chunmiantest.qufenqi.com"

2. php-fpm的错误日志

[-Mar- ::] WARNING: [pool www] child  exited with code  after 5484.614486 seconds from start
[-Mar- ::] NOTICE: [pool www] child  started

3. 浏览器显示

502

4. make test显示

@'localhost' (using password: NO)
SKIP PDO MySQL Bug # (float parameters truncated to integer in prepared statements) [tests/bug_41698.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP PDO MySQL Bug # (stored procedure call returning single rowset blocks future queries) [tests/bug_41997.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (Multi-statement execution via PDO::exec() makes connection unusable) [tests/bug_42499.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (Memory errors in PDO constructor) [tests/bug_43371.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (Unexpected exception thrown in foreach() statement) [tests/bug_44454.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (The MySQL PDO driver resets variable content after bindParam on tinyint field) [tests/bug_44707.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (PDOStatement->execute() returns true then false for same statement) [tests/bug_45120.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (No ability to connect to database named 't;', no chance to escape semicolon) [tests/bug_50323.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (getColumnMeta causes segfault when re-executing query after calling nextRowset) [tests/bug_51670.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP PDO MySQL Bug # (PDO::nextRowset() after a multi-statement query doesn't always work) [tests/bug_61207.phpt] reason: SQLSTATE[28000] [1045] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (PDO Segfaults with PERSISTENT == TRUE && EMULATE_PREPARES == FALSE) [tests/bug_61411.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (A parsing bug in the prepared statements can lead to access violations) [tests/bug_61755.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP Bug # (Invalid free of persistent results on error/connection loss) [tests/bug_74376.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
SKIP PDO MySQL PECL bug # (http://pecl.php.net/bugs/bug.php?id=12925) [tests/bug_pecl_12925.phpt] reason: SQLSTATE[28000] [1045] Access denied for user 'root'@'localhost' (using password: NO)
SKIP PECL Bug # (Calling stored procedure several times) [tests/bug_pecl_7976.phpt] reason: SQLSTATE[] [] Access denied for user 'root'@'localhost' (using password: NO)
TEST / [tests/common.phpt]
Warning: opendir(/usr/local/php-7.3./ext/pdo_mysql/ext/pdo/tests): failed to open dir: No such file or directory in /usr/local/php-7.3./ext/pdo_mysql/run-tests.php on line
ERROR: cannot open directory: /usr/local/php-7.3./ext/pdo_mysql/ext/pdo/tests
Makefile:: recipe for target 'test' failed
make: *** [test] Error 

其实这些问题的罪魁祸首就是在编译的时候没有编译导致的，问题排查的方法很重要，基础知识也很重要！！！

mysqlnd

另外可以通过md5sum来检测生成的pdo_mysql.so

使用 php -i 查看php在cli下面的详细信息  // 查看程序能够正确执行
使用 php -m查看php 在cli下面加载了哪些模块