php中mysql,mysqli,mysqlnd,pdo到底是什么

查看编译参数

PHP5安装

• 进到src目录下 cd /usr/local/src
• 下载PHP5源码包wget http://cn2.php.net/distributions/php-5.6.37.tar.gz
• 解压下载的文件 tar -zxvf php-5.6.37.tar.gz
• 进入文件目录 cd php-5.6.37
• configure ./configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache/bin/apxs --with-config-file-path=/usr/local/php/etc --with-mysql=/usr/local/mysql --with-pdo-mysql=/usr/local/mysql --with-mysqli=/usr/local/mysql/bin/mysql_config --with-zlib-dir --with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir --with-iconv-dir --with-zlib-dir --with-bz2 --with-openssl-dir=/usr/include/openssl --with-mcrypt --enable-soap --enable-gd-native-ttf --enable-mbstring --enable-sockets --enable-exif
• 查看报错信息

checking for xml2-config path… configure: error: xml2-config not found. Please check your libxml2 installation.

• 解决办法如下，完成后再执行configure

yum install libxml2-devel -y yum install libxml2 -y

• 查看报错信息

configure:error: cannot find OpenSSL's 
    

• 解决如下，完成后再执行configure时将--with-openssl 改为--with-openssl-dir=/usr/include/openssl。或者不更改命令，直接执行yum install -y openssl-devel 也可以。

export PHP_OPENSSL_DIR=yes

• 查看报错信息

configure:error:please reinstall the BZip2 distribution

• 解决如下，完成后继续configure

yum install bzip2-devel -y

• 查看报错信息

configure:error:jpeglib.h not found

• 解决如下，完成后继续configure

yum install libjpeg-devel -y

• 查看报错信息

png.h  not found

• 解决后继续configure

yum install libpng-devel

• 查看报错信息

freetype-config not found

• 解决后继续configure

yum install freetype-devel -y

• 查看报错信息

mcrypt.h not found please reinstall libmcrypt

• 解决后继续configure

yum install libmcrypt-devel -y

• 出现这个界面就可以编译安装了
• make && make install
• 编译安装完之后需要拷贝一个文件做配置文件 ，源文件是在/usr/local/src/php-5.6.37下 ，cp php.ini-development /usr/local/php/etc/php.ini
• 查看是否加载配置文件，该命令可以查看PHP信息，包括编译参数，configure路径等。

/usr/local/php/bin/php -i |less

安装PHP 7

PHP7和PHP5的安装大同小异

• 进入/usr/local/src目录

• wget

• tar jxvf php-7.1.20.tar.bz2

• cd php-7.1。20

• ./configure --prefix=/usr/local/php7 --with-apxs2=/usr/local/apache/bin/apxs --with-config-file-path=/usr/local/php7/etc --with-pdo-mysql=/usr/local/mysql --with-mysqli=/usr/local/mysql/bin/mysql_config --with-libxml-dir --with-gd --with-jpeg-dir --with-png-dir --with-freetype --with-iconv-dir --with-zlib-dir --with-bz2 --with-openssl --with-mcrypt --enable-soap --enable-gd-native-ttf --enable-mbstring --enable-sockets --enable-exif

• 因为之前装过PHP5，很多包已经安装了，所以这一步一般不会报错。

checking whether to build shared libraries... yeschecking whether to build static libraries... nocreating libtoolappending configuration tag "CXX" to libtoolGenerating filesconfigure: creating ./config.statuscreating main/internal_functions.ccreating main/internal_functions_cli.c+--------------------------------------------------------------------+| 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.config.status: creating php7.specconfig.status: creating main/build-defs.hconfig.status: creating scripts/phpizeconfig.status: creating scripts/man1/phpize.1config.status: creating scripts/php-configconfig.status: creating scripts/man1/php-config.1config.status: creating sapi/cli/php.1config.status: creating sapi/cgi/php-cgi.1config.status: creating ext/phar/phar.1config.status: creating ext/phar/phar.phar.1config.status: creating main/php_config.hconfig.status: executing default commandsconfigure: WARNING: unrecognized options: --with-freetype[root@localhost php-7.1.20]# echo $?0

• make&&make install 编译安装
• ls /usr/local/apache2.4/modules/libphp7.so

[root@localhost php-7.1.20]# cd /usr/local/apache/modules/[root@localhost modules]# lshttpd.exp             mod_authn_dbm.so        mod_cache.so          mod_headers.so              mod_proxy_ajp.so       mod_ratelimit.so         mod_socache_shmcb.solibphp5.so

• cp php.ini-production /usr/local/php7/etc/php.ini
• 安装完成后，可以使用/usr/local/apache2.4/bin/apachectl -M查看加载的模块，可以看到7和5都被加载了。-

[root@localhost php-7.1.20]# /usr/local/apache/bin/apachectl -M |grep phpAH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message php5_module (shared) php7_module (shared)

• 当一台机器上面装的既有5又有7的时候，如果想让Apache启动时加载7，就在配置文件中将5那一行注释掉 vi /usr/local/apache/conf/httpd.conf

#LoadModule php5_module        modules/libphp5.soLoadModule php7_module        modules/libphp7.so

注释掉5后发现不再加载PHP5了。

[root@localhost php-7.1.20]# /usr/local/apache/bin/apachectl -M |grep phpAH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message php7_module (shared)