A. php5.2.6升級升級到php5.5
mysql一般不需要升級，5.0+的就可以。換個伺服器套件集成環境，建議phpstudy，一鍵切換php版本。或者wamp，下載對應版本的php直接安裝。後期更換也完全可以。
B. windows php 5.2.17 怎麼升級到5.4或者5.5
現在php都主推 7了 最低也是 5.6了 ,你這版本都好低呀
php升級，php是腳本語言，直接下載對應版本的php，然後，經apache的php模塊 替換就是了
如果是開發 用phpstudy等集成開發軟體就可以了 ，如果要練手 建議配置Linux 上的lamp,lnmp環境
apache 其中的配置 修改
載入PHP模塊,注意絕對路徑：
#php5.6LoadMole php5_mole D:/phpsetup/php/php-5.6.22-Win32-VC11-x86/php5apache2_4.dll
<IfMole php5_mole>
PHPIniDir "D:/phpsetup/php/php-5.6.22-Win32-VC11-x86/"
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps</IfMole>
如果是php7，相應更改即可:
#php7LoadMole php7_mole D:/phpsetup/php/php-7.0.13-Win32-VC14-x64/php7apache2_4.dll<IfMole php7_mole>
PHPIniDir "D:/phpsetup/php/php-7.0.13-Win32-VC14-x64/"
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps</IfMole>
C. windows server2012 iis php5.3升級到php5.6要怎麼搞
你可以安裝個php5.6，然後查一下php更新了哪些東西，最後改下環境變數，設置下iis與Php的介面什麼的不就ok啦?希望對你有用，我在後盾網學習剛下課，有不會的可以問我ｸﾞｯ!(๑•̀ㅂ•́)و✧
D. 阿里雲上的centos 7.2怎麼yum安裝php 5.6
因之前通過網易的 centos 鏡像，將阿里雲的 centos 升級到最新版了，乘自己的項目尚未開始正式開發，遂將所有的相應環境都升級到最高。
查看 centos 版本：
[root@iZ23d ~]# cat /etc/centos-release
CentOS Linux release 7.2.1511 (Core)
1、刪除之前的 php 版本：
[root@iZ23d ~]# yum remove php* php-common
Loaded plugins: langpacks
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
No Match for argument: php-5.4.16
No Match for argument: php-5.4.16.tar.gz
No Match for argument: php-7.0.1RC1
No Match for argument: php-7.0.1RC1.tar.gz
No Match for argument: phpMyAdmin-4.4.0.tar.gz
No Match for argument: php-common
No Packages marked for removal
2、rpm 安裝 Php7 相應的 yum源：
[root@iZ23d ~]# rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
Retrieving https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
warning: /var/tmp/rpm-tmp.LhJKKR: Header V4 RSA/SHA1 Signature, key ID 62e74ca5: NOKEY
Preparing... ################################# [100%]
package webtatic-release-7-3.noarch is already installed
3、 直接yum安裝php7：
[root@iZ23d ~]# yum install php70w
Loaded plugins: langpacks
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Resolving Dependencies
--> Running transaction check
。。。 【省略】
Warning: RPMDB altered outside of yum.
Installing : php70w-common-7.0.0-1.w7.x86_64 1/3
Installing : php70w-cli-7.0.0-1.w7.x86_64 2/3
Installing : php70w-7.0.0-1.w7.x86_64 3/3
Verifying : php70w-7.0.0-1.w7.x86_64 1/3
Verifying : php70w-common-7.0.0-1.w7.x86_64 2/3
Verifying : php70w-cli-7.0.0-1.w7.x86_64 3/3
Installed:
php70w.x86_64 0:7.0.0-1.w7
Dependency Installed:
php70w-cli.x86_64 0:7.0.0-1.w7 php70w-common.x86_64 0:7.0.0-1.w7
Complete!
4、檢查 php 版本：
[root@iZ23d ~]# php -v
PHP 7.0.0 (cli) (built: Dec 2 2015 20:42:32) ( NTS )
Copyright (c) 1997-2015 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2015 Zend Technologies
[root@iZ23d2e6hoqZ ~]#
以上顯示安裝成功！
5、重啟 Apache，查看 phpinfo :
[root@iZ23d ~]# systemctl restart httpd.service
檢查phpinfo:
PHP Version 7.0.0
SystemLinux iZ23d 3.10.0-229.11.1.el7.x86_64 #1 SMP Thu Aug 6 01:06:18 UTC 2015 x86_64
Build DateDec 2 2015 20:43:38
Server APIApache 2.0 Handler
Virtual Directory Supportdisabled
Configuration File (php.ini) Path/etc
Loaded Configuration File/etc/php.ini
Scan this dir for additional .ini files/etc/php.d
Additional .ini files parsed/etc/php.d/bz2.ini, /etc/php.d/calendar.ini, /etc/php.d/ctype.ini, /etc/php.d/curl.ini, /etc/php.d/exif.ini, /etc/php.d/fileinfo.ini, /etc/php.d/ftp.ini, /etc/php.d/gettext.ini, /etc/php.d/gmp.ini, /etc/php.d/iconv.ini, /etc/php.d/json.ini, /etc/php.d/phar.ini, /etc/php.d/shmop.ini, /etc/php.d/simplexml.ini, /etc/php.d/sockets.ini, /etc/php.d/tokenizer.ini, /etc/php.d/xml.ini, /etc/php.d/zip.ini
PHP API20151012
PHP Extension20151012
Zend Extension320151012
Zend Extension BuildAPI320151012,NTS
PHP Extension BuildAPI20151012,NTS
Debug Buildno
Thread Safetydisabled
Zend Signal Handlingdisabled
Zend Memory Managerenabled
Zend Multibyte Supportdisabled
IPv6 Supportenabled
DTrace Supportenabled
Registered PHP Streamshttps, ftps, compress.zlib, php, file, glob, data, http, ftp, compress.bzip2, phar, zip
Registered Stream Socket Transportstcp, udp, unix, udg, ssl, sslv3, sslv2, tls, tlsv1.0, tlsv1.1, tlsv1.2
Registered Stream Filterszlib.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, dechunk, bzip2.*, convert.iconv.*
This program makes use of the Zend Scripting Language Engine:
Zend Engine v3.0.0, Copyright (c) 1998-2015 Zend Technologies
Configuration
apache2handler
Apache VersionApache/2.4.6 (CentOS)
Apache API Version20120211
Server [email protected]
Hostname:Portxxxx.xxxxx.xxx:0
User/Groupapache(48)/48
Max RequestsPer Child: 0 - Keep Alive: on - Max Per Connection: 100
TimeoutsConnection: 60 - Keep-Alive: 15
Virtual ServerYes
Server Root/etc/httpd
Loaded Molescore mod_so http_core mod_access_compat mod_actions mod_alias mod_allowmethods mod_auth_basic mod_auth_digest mod_authn_anon mod_authn_core mod_authn_dbd mod_authn_dbm mod_authn_file mod_authn_socache mod_authz_core mod_authz_dbd mod_authz_dbm mod_authz_groupfile mod_authz_host mod_authz_owner mod_authz_user mod_autoindex mod_cache mod_cache_disk mod_data mod_dbd mod_deflate mod_dir mod_mpio mod_echo mod_env mod_expires mod_ext_filter mod_filter mod_headers mod_include mod_info mod_log_config mod_logio mod_mime_magic mod_mime mod_negotiation mod_remoteip mod_reqtimeout mod_rewrite mod_setenvif mod_slotmem_plain mod_slotmem_shm mod_socache_dbm mod_socache_memcache mod_socache_shmcb mod_status mod_substitute mod_suexec mod_unique_id mod_unixd mod_userdir mod_version mod_vhost_alias mod_dav mod_dav_fs mod_dav_lock mod_lua prefork mod_proxy mod_lbmethod_bybusyness mod_lbmethod_byrequests mod_lbmethod_bytraffic mod_lbmethod_heartbeat mod_proxy_ajp mod_proxy_balancer mod_proxy_connect mod_proxy_express mod_proxy_fcgi mod_proxy_fdpass mod_proxy_ftp mod_proxy_http mod_proxy_scgi mod_proxy_wstunnel mod_ssl mod_systemd mod_cgi mod_perl mod_php7
以上顯示 php7 安裝成功！