centos php无法启动的解决办法：1、安装扩展包并更新系统；2、安装php依赖组件；3、下载php安装包并解压；4、进入解压目录并开始编译；5、更新依赖库；6、进行安装；7、进行文件配置；8、添加权限即可。
本文操作环境：centOS6.8系统、php7.2.1版，DELL G3电脑
centOS安装PHP后，php-fpm启动失败的解决
在centOS6.8上安装php，出各种问题，光是gcc的版本太低，升级gcc这个，就让我气了两天，翻遍了几乎所有相关博客总算解决了。还有mysql安装也没少踩坑，所以大家还是尽量用centOS7吧，少生气能多活几年呢。。。
现在说一下centOS6.8上编译安装php7.2.1吧。
1，安装扩展包并更新系统(我在根目录下开始的)：
yum install epel-release -y yum update
2,安装php依赖组件（一段全复制上去，其实掠过也可能没关系）：
立即学习“PHP免费学习笔记（深入）”；
yum -y install wget vim pcre pcre-devel openssl openssl-devel libicu-devel gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel ncurses ncurses-devel curl curl-devel krb5-devel libidn libidn-devel openldap openldap-devel nss_ldap jemalloc-devel cmake boost-devel bison automake libevent libevent-devel gd gd-devel libtool* libmcrypt libmcrypt-devel mcrypt mhash libxslt libxslt-devel readline readline-devel gmp gmp-devel libcurl libcurl-devel openjpeg-devel
3，下载php安装包并解压：
wget http://am1.php.net/distributions/php-7.2.1.tar.gz tar xvf php-7.2.1.tar.gz
4，进入解压目录并开始编译(编译千万不能省，运行出错了就不能make了，这是我选出来的最靠谱可行的编译了)：
cd /php-7.2.1 ./configure --prefix=/usr/local/php7 --with-config-file-path=/usr/local/php7/etc --with-mcrypt=/usr/include --with-mysql=mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --with-gd --with-iconv --with-zlib --enable-xml --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --enable-mbregex --enable-fpm --enable-mbstring --enable-ftp --enable-gd-native-ttf --with-openssl --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --without-pear --with-gettext --enable-session --with-curl --with-jpeg-dir --with-freetype-dir --enable-opcache
5，为了安全保险的给make出来，先更新依赖库以防万一：
yum -y install libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel mysql pcre-devel
6，安装：
make make install
7,关于配置：
cp php.ini-development /usr/local/php7/etc/php.ini cp /usr/local/php7/etc/php-fpm.conf.default /usr/local/php7/etc/php-fpm.conf cp /usr/local/php7/etc/php-fpm.d/www.conf.default /usr/local/php7/etc/php-fpm.d/www.conf
8，加个权限：
chmod +x /etc/init.d/php-fpm
现在试一下，/etc/init.d/php-fpm start
如果php启动成功了，那你很幸福；如果失败了，接着往下看。
大概出现的是下图这个情况吧？
再试一下运行提示的命令，出的问题是ERROR:FPM initialization failed.如下图：
所以出问题的是php-fpm，机智如我，把我另一个虚拟机（centOS7）上的php-fpm给换上去了，只需要把php的安装根目录按照自己的情况改一下就成了（就是这一行：prefix=/usr/local/php）。现在我就无私的把我的php-fpm文件奉献出来。
#! /bin/sh
### BEGIN INIT INFO # Provides: php-fpm # Required-Start: $remote_fs $network # Required-Stop: $remote_fs $network # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: starts php-fpm # Description: starts the PHP FastCGI Process Manager daemon ### END INIT INFO
prefix=/usr/local/php exec_prefix=${prefix}
php_fpm_BIN=${exec_prefix}/sbin/php-fpm php_fpm_CONF=${prefix}/etc/php-fpm.conf php_fpm_PID=${prefix}/var/run/php-fpm.pid
php_opts="--fpm-config $php_fpm_CONF --pid $php_fpm_PID"
wait_for_pid () { try=0
while test $try -lt 35 ; do
case "$1" in 'created') if [ -f "$2" ] ; then try='' break fi ;;
'removed') if [ ! -f "$2" ] ; then try='' break fi ;; esac
echo -n . try=`expr $try + 1` sleep 1
done
}
case "$1" in start) echo -n "Starting php-fpm "
$php_fpm_BIN --daemonize $php_opts
if [ "$?" != 0 ] ; then echo " failed" exit 1 fi
wait_for_pid created $php_fpm_PID
if [ -n "$try" ] ; then echo " failed" exit 1 else echo " done" fi ;;
stop) echo -n "Gracefully shutting down php-fpm "
if [ ! -r $php_fpm_PID ] ; then echo "warning, no pid file found - php-fpm is not running ?" exit 1 fi
kill -QUIT `cat $php_fpm_PID`
wait_for_pid removed $php_fpm_PID
if [ -n "$try" ] ; then echo " failed. Use force-quit" exit 1 else echo " done" fi ;;
status) if [ ! -r $php_fpm_PID ] ; then echo "php-fpm is stopped" exit 0 fi
PID=`cat $php_fpm_PID` if ps -p $PID | grep -q $PID; then echo "php-fpm (pid $PID) is running..." else echo "php-fpm dead but pid file exists" fi ;;
force-quit) echo -n "Terminating php-fpm "
if [ ! -r $php_fpm_PID ] ; then echo "warning, no pid file found - php-fpm is not running ?" exit 1 fi
kill -TERM `cat $php_fpm_PID`
wait_for_pid removed $php_fpm_PID
if [ -n "$try" ] ; then echo " failed" exit 1 else echo " done" fi ;;
restart) $0 stop $0 start ;;
reload)
echo -n "Reload service php-fpm "
if [ ! -r $php_fpm_PID ] ; then echo "warning, no pid file found - php-fpm is not running ?" exit 1 fi
kill -USR2 `cat $php_fpm_PID`
echo " done" ;;
configtest) $php_fpm_BIN -t ;;
*) echo "Usage: $0 {start|stop|force-quit|restart|reload|status|configtest}" exit 1 ;;
esac推荐：《centos教程》
