2018年6月21日17:17:09，注意：不是详细文档，新手可能会看不懂
windows下安装
项目是sql server 2008的k3，php连接数据库写的API，因为是买的时候是别人的程序，测试环境用的windows 2008，首先需要需要下载对应的php版本的DLL和驱动，好多人只下载的DLL，但是没有ODBC安装驱动，
还得根据版本下载，https://docs.microsoft.com/zh-cn/sql/connect/php/microsoft-php-driver-for-sql-server?view=sql-server-2017
配置文件
extension=php_sqlsrv.dll
extension=php_pdo_sqlsrv.dll
这个就是具体的添加dll方法
https://docs.microsoft.com/zh-cn/sql/connect/php/loading-the-php-sql-driver?view=sql-server-2017
注意，有mssql和pdosqlserv2个，一般MVC框架都是使用pdo，这样就可以访问了
linux下安装
注意也有mssql.so和 pdo_dblib.so
首先安装，freetds，官网 http://www.freetds.org
选择版本参考 http://www.freetds.org/userguide/choosingtdsprotocol.htm
| Product | TDS Version | Comment |
|---|---|---|
| Sybase before System 10, Microsoft SQL Server 6.x | 4.2 | Still works with all products, subject to its limitations. |
| Sybase System 10 and above | 5.0 | Still the most current protocol used by Sybase. |
| Sybase System SQL Anywhere | 5.0 only | Originally Watcom SQL Server, a completely separate codebase. Our best information is that SQL Anywhere first supported TDS in version 5.5.03 using the OpenServer Gateway (OSG), and native TDS 5.0 support arrived with version 6.0. |
| Microsoft SQL Server 7.0 | 7.0 | Includes support for the extended datatypes in SQL Server 7.0 (such as char/varchar fields of more than 255 characters), and support for Unicode. |
| Microsoft SQL Server 2000 | 7.1 | Include support for bigint (64 bit integers), variant and collation on all fields. Collation is not widely used. |
| Microsoft SQL Server 2005 | 7.2 | Includes support for varchar(max), varbinary(max), xml datatypes and MARS[a]. |
| Microsoft SQL Server 2008 | 7.3 | Includes support for time, date, datetime2, datetimeoffset. |
| Microsoft SQL Server 2012 or 2014 | 7.4 | Includes support for session recovery. |
| N/A | 8.0 | FreeTDS will alias this version to 7.1 for backwards compatibility reasons, but this should be avoided due to future compatibility concerns. See note below on obsolete versions. |
我这个版本是 freetds-1.00.86
wget ftp://ftp.freetds.org/pub/freetds/stable/freetds-patched.tar.gz
tar -zxvf freetds-patched.tar.gz
./configure --prefix=/usr/local/freetds --with-tdsver=7.3 --enable-msdblib
make && make install
配置FreeTDS
echo "/usr/local/freetds/lib/" > /etc/ld.so.conf.d/freetds.conf
ldconfig
测试
/usr/local/freetds/bin/tsql -C
连接测试
/usr/local/freetds/bin/tsql -H 172.17.1.250 -p 1433 -U sa -P 密码
注意，如果你是编译的那你php的url就是/usr/local/php，如果你是yum ，php-config会没有，就需要安装 yum install php-devel
注意我是5.6版本就需要， yum install php56w-php-devel
编译的话就没这些麻烦，
编译安装的 添加扩展
cd /soft/php-5.6.28/ext/mssql/
linux下用phpize给PHP动态添加扩展
# /usr/local/php/bin/phpize
# ./configure --with-php-config=/usr/local/php/bin/php-config --with-mssql=/usr/local/freetds/
# make && make install
cd /soft/php-5.6.28/ext/pdo_dblib/
linux下用phpize给PHP动态添加扩展
# /usr/local/php/bin/phpize
# ./configure --with-php-config=/usr/local/php/bin/php-config --with-pdo-dblib=/usr/local/freetds/
# make && make install
whereis php查看命令路径 ，whereis需要你自己安装
[root@test software]# whereis php
php: /usr/bin/php /etc/php.ini /etc/php.d /usr/lib64/php /usr/include/php /usr/share/php
[root@test software]# whereis php-config
php-config: /usr/bin/php-config /usr/share/man/man1/php-config.1.gz
注意，yum版本扩展
/usr/bin/phpize
./configure --with-php-config=/usr/bin/php-config --with-pdo-dblib=/usr/local/freetds/
注意，yum在添加so的时候，必须
/etc/php.d/pdo.ini, 里面填在，打开phpinfo的时候搜索一下pdo
编译版不会有这个问题，pdo.so需要pdo_dblib之前，有依赖关系
extension=pdo.so
extension = pdo_dblib.so
extension = mssql.so
测试连接
error_reporting(E_ALL); header("Content-type: text/html; charset=utf8"); $serverName = "172.17.1.250:1433"; //数据库服务器地址 $uid = "sa"; //数据库用户名 $pwd = ""; //数据库密码 $dbname = ''; $conn = new PDO("dblib:host=$serverName;dbname=$dbname", "$uid", "$pwd"); if ($conn == false) { echo "连接失败！"; // die(print_r(sqlsrv_errors(), true)); } else { echo "连接成功！"; }
之前怀疑是windows的时候，出现http 429 Too Many Attempts.一开始认为是windows2008的并发数少，就换了linux做接口访问数据库，修改了sql server 2008 属性 连接的最大连接数，和windows2008的连接数
从widnows2008的nginx到apache，怕是nginx在windows下并发差，到linux pdo访问接口，依然还有这个问题，最后折腾了差不多一天发现是laravel的一个中间件的问题，
Laravel从5.2开始，增加了一个Throttle的中间件。如果你仔细看一下Kernel.php文件，你就会发现，api路由是默认使用了这个中间件的。
如果你需要使用就直接添加
Route::group(['domain' => ''], function() { Route::group(['namespace' => 'Data', 'prefix' => 'data','middleware'=>'throttle'], function () { //home Route::get('/', 'IndexController@index'); //国内宏观 Route::get('/test', 'TestController@test'); //测试地址 }); });
一把双刃剑，最后发现每次到60次左右的访问就会出现，google才出来的，哎，百度半天不出结果
对laravel源码研究的少，太忙了，有时间读一下源码