php5通用兼容的公共文件.-PHP源码

每次新项目, 都要为环境配置做许多php的修正, 为此, 我整理了这一份通用的php抬头文件.
使用方法, 将代码保存为某个php文件, 然后在项目中引入即可.

代码作用如下:
1: 规范化编码问题, utf-8, 时间区域, 数字长度都有变更.
2: 规范化字符转义问题, 全部采用php5.3之后的标准, 都不转化.
3: session, gzip做判断启动. 这有利于防止隐性冲突.
4: 对SERVER数组进行整理, 隐藏掉一些非安全段, 增加以HTTP_开头的一些数据, 如内存占用, 起始时间, 当前url地址, ip, get, post等等. 你只要打印出$_SERVER数组, 基本上许多数据就都有了, 并且它是超全局的.

 $v) $_GET[$k] = stripslashes($v);
 foreach($_POST as $k => $v) $_POST[$k] = stripslashes($v);
 foreach($_COOKIE as $k => $v) $_COOKIE[$k] = stripslashes($v);
}
# 清空$_ENV数组, 释放掉$_SERVER数组中几个关键性数值. 
unset($_ENV, $_SERVER[&＃39;MIBDIRS&＃39;],$_SERVER[&＃39;MYSQL_HOME&＃39;],$_SERVER[&＃39;OPENSSL_CONF&＃39;],$_SERVER[&＃39;PHP_PEAR_SYSCONF_DIR&＃39;],$_SERVER[&＃39;PHPRC&＃39;],$_SERVER[&＃39;SystemRoot&＃39;],$_SERVER[&＃39;COMSPEC&＃39;],$_SERVER[&＃39;PATHEXT&＃39;], $_SERVER[&＃39;WINDIR&＃39;],$_SERVER[&＃39;PATH&＃39;]);
# 一些函数.
function ini_end(){}
function ini_sets($key, $val){return @ini_set($key, $val);}
function ini_http_server(){
 if (!$_SERVER[&＃39;REQUEST_URI&＃39;]) { // IIS 5 compatibility
 $_SERVER[&＃39;REQUEST_URI&＃39;] = $_SERVER[&＃39;ORIG_PATH_INFO&＃39;];
}
 if (!strpos($_SERVER[&＃39;REQUEST_URI&＃39;], &＃39;?&＃39;) && $_SERVER[&＃39;QUERY_STRING&＃39;] != &＃39;&＃39;) { // IIS 7 compatibility
 $_SERVER[&＃39;REQUEST_URI&＃39;] .= &＃39;?&＃39;.$_SERVER[&＃39;QUERY_STRING&＃39;];
}
 $_SERVER[&＃39;REQUEST_URI&＃39;] = strtr($_SERVER[&＃39;REQUEST_URI&＃39;], array(&＃39;&&&＃39;=>&＃39;&&＃39;));
 $HTTPS = $_SERVER[&＃39;HTTPS&＃39;] && strcasecmp($_SERVER[&＃39;HTTPS&＃39;], &＃39;off&＃39;);
 $php_selfs = rawurlencode(dirname($_SERVER[&＃39;SCRIPT_NAME&＃39;]));
 $php_selfs = strtr($php_selfs, array(&＃39;%2F&＃39;=>&＃39;/&＃39;,&＃39;%5C&＃39;=>&＃39;/&＃39;));
 $php_selfs = trim($php_selfs, &＃39;/&＃39;);
if($php_selfs)
 $_SERVER[&＃39;REQUEST_URI&＃39;] = strtr($_SERVER[&＃39;REQUEST_URI&＃39;], array($php_selfs.&＃39;/&＃39;=>&＃39;&＃39;));
 $httppre = (!$HTTPS)?&＃39;http&＃39;:&＃39;https&＃39;;
 if($_SERVER[&＃39;SERVER_PORT&＃39;] !== &＃39;80&＃39; && $_SERVER[&＃39;SERVER_PORT&＃39;] !== &＃39;443&＃39;){
 $host = trim($httppre.&＃39;://&＃39;.$_SERVER[&＃39;HTTP_HOST&＃39;].&＃39;:&＃39;.$_SERVER[&＃39;SERVER_PORT&＃39;].&＃39;/&＃39;.$php_selfs,&＃39;/&＃39;).&＃39;/&＃39;;
}else{
 $php_selfs && $php_selfs =&＃39;/&＃39;.$php_selfs;
 $host = trim($httppre.&＃39;://&＃39;.$_SERVER[&＃39;HTTP_HOST&＃39;].$php_selfs,&＃39;/&＃39;).&＃39;/&＃39;;
}
 $files = trim($_SERVER[&＃39;REQUEST_URI&＃39;], &＃39;./&＃39;);
 $_SERVER[&＃39;HTTP_URL&＃39;] = $host.$files;
 $_SERVER[&＃39;HTTP_PATH&＃39;] = $_SERVER[&＃39;DOCUMENT_ROOT&＃39;].&＃39;/&＃39;;
 $_SERVER[&＃39;HTTP_IP&＃39;] = max(getenv(&＃39;SERVER_ADDR&＃39;),getenv(&＃39;REMOTE_ADDR&＃39;),getenv(&＃39;HTTP_X_FORWARDED_FOR&＃39;),getenv(&＃39;HTTP_CLIENT_IP&＃39;));
 $_SERVER[&＃39;HTTP_TIME_FLOAT&＃39;] = microtime(true);
 $_SERVER[&＃39;HTTP_MEMORY_PEAK_USAGE&＃39;] = memory_get_peak_usage();
 $_SERVER[&＃39;HTTP_MEMORY_USAGE&＃39;] = memory_get_usage();
 $_SERVER[&＃39;HTTP_GET&＃39;] = $_GET;
 $_SERVER[&＃39;HTTP_POST&＃39;] = $_POST;
 $_SERVER[&＃39;HTTP_COOKIE&＃39;] = $_COOKIE;
}