Unable to load dynamic library 'C:\php7.1.25\ext\php_igbinary.dll' - 找不到指定的程序。in Unknown on line 0

问题：php 加载redis需要的模块时出现如下错误

PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php7.1.25\ext\php_igbinary.dll' - 找不到指定的程序。
in Unknown on line 0

$Unable to load dynamic library 'C:\php7.1.25\ext\php_igbinary.dll' - 找不到指定的程序。in Unknown on line 0$

本机环境:iis10,php7.1.25

解决过程：

1 ：查看了C:\php7.1.25\ext\php_igbinary.dll 是存在有这个文件的，

2：php.ini也加载了php_igbinary.dll

$Unable to load dynamic library 'C:\php7.1.25\ext\php_igbinary.dll' - 找不到指定的程序。in Unknown on line 0$

3:后来发现php_igbinary.dll文件与php7.1.25版本不符合

$Unable to load dynamic library 'C:\php7.1.25\ext\php_igbinary.dll' - 找不到指定的程序。in Unknown on line 0$

4：去找符合php7.1.25 NTS 86的php_igbinary.dll

$Unable to load dynamic library 'C:\php7.1.25\ext\php_igbinary.dll' - 找不到指定的程序。in Unknown on line 0$

解压后复制php_igbinary.dll替换C:\php7.1.25\ext\php_igbinary.dll就OK了

总结：如果发现php加载模块错误而模块文件又存在则有可能是模块版本不对