What should I do if centos php cannot be started?

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）：

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

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