编译php的时候,报configure: error: mcrypt.h not found. Please reinstall libmcrypt.错误的解决办法

configure: error: mcrypt.h not found. Please reinstall libmcrypt.

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libmarypt:
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/attic/libmcrypt/libmcrypt-2.5.7.tar.gz
安装：
66 tar -zxvf libmcrypt-2.5.7.tar.gz
67 cd libmcrypt-2.5.7
68 mkdir -p /usr/local/libmcrytp
69 ./configure prefix=/usr/local/libmcrytp/
70 make
71 make install
然后再安装PHP