今天在编译php的时候，出现如下错误php安装出错：configure: error: mcrypt.h not found. Please reinstall libmcrypt.，意思是，没有查找到mcrytp.h,需要安装libcrytp,在下面的地址下载
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/attic/libmcrypt/libmcrypt-2.5.7.tar.gz
安装：
tar -zxvf libmcrypt-2.5.7.tar.gz
cd libmcrypt-2.5.7
./configure
make
make install
然后再安装PHP
PHP configure: error: mcrypt.h not found. Please reinstall libmcrypt