Linux 安装 php-5.4.51. 下载 php-5.4.5.tar.gz2. 解压[root@test31~] tar -zxvf php-5.4.5.tar.gz3. 进入安装文件目录[root@test31~] cd php-5.4.54. 执行[root@test31 php-5.4.5]# ./configure --prefix=/usr/local/php5 --with-apxs2=/usr/local/apache/bin/apxs --with-mysql注意：绿色标记为你 apache的安装目录出现问题："configure: error: xml2-config not found. Please check your libxml2 installation."检查是否安装了libxm包[root@test31 php-5.4.5]# rpm -qa |grep libxml2libxml2-2.6.26-2.1.12libxml2-python-2.6.26-2.1.12重新安装libxml2和libxml2-devel包yum install libxml2yum install libxml2-devel -y (装这个)安装完之后查找xml2-config文件是否存在[root@test31 php-5.4.5]# find / -name "xml2-config"/usr/bin/xml2-config如果存在的话重新安装php[root@test31 php-5.4.5]# ./configure --prefix=/usr/local/php5 --with-apxs2=/usr/local/apache/bin/apxs --with-mysql执行如果报错： “Cannot find MySQL header files under yes”需要指定mysql的安装路径[root@test31 php-5.4.5]# ./configure --prefix=/usr/local/php5 --with-apxs2=/usr/local/apache/bin/apxs --with-mysql=/usr/local/mysql安装成功的标志是：出现+--------------------------------------------------------------------+| License: || This software is subject to the PHP License, available in this || distribution in the file LICENSE. By continuing this installation || process, you are bound by the terms of this license agreement. || If you do not agree with the terms of this license, you must abort || the installation process at this point. |+--------------------------------------------------------------------+Thank you for using PHP.I