


Three configuration methods and comparison of PHP environment in IIS
When configuring PHP under Windows IIS 6.0, there are usually three configuration methods: CGI, ISAPI and FastCGI. All three modes can run successfully under IIS 6.0. Now I will talk about the differences in configuration and performance among these three modes. .
1. CGI (Common Gateway Interface) is generally an executable program, such as an EXE file, and the WEB server each occupies a different process, and generally a CGI program can only handle one user request. In this way, when the number of user requests is very large, it will occupy a large amount of system resources, such as memory, CPU time, etc., resulting in low performance.
2. ISAPI (Internet Server Application Program Interface) is a set of API interfaces for WEB services provided by Microsoft. It can realize all the functions provided by CGI, and has been extended on this basis, such as providing a filter application program interface. ISAPI applications are mostly used in the form of DLL dynamic libraries, which can be executed after being requested by the user. They will not disappear immediately after processing a user request, but will continue to reside in the memory and wait for other user inputs to be processed. In addition, ISAPI's DLL application and WEB server are in the same process, and the efficiency is significantly higher than CGI.
Configure ISAPI PHP under IIS6 of Windows Server 2003. The configuration method is to add a new WEB service extension in the "WEB Service Extension" of IIS. The program suffix is PHP and the ISAPI program is php5isapi.dll, and then " Add the variable name PHPRC in "Environment Variables" - "System Variables", and the value is the path to php.ini. In the Internet Information Service Manager, select the root directory of the website or application and open the directory property page (right-click and select "Properties") , and then select "Home Directory". Click the "Configure" button and select the "Mapping" tab page. Click "Add...", set the "Executable File" to: c:phpphp5isapi.dll, set the extension to .php, select "Confirm whether the file exists", and then "OK" to save the settings. Restart the server to complete the PHP configuration.
3. FastCGI is an open extension of CGI with a scalable architecture. Its main behavior is to keep the CGI interpreter process in memory and thus obtain higher performance. Repeated loading of traditional CGI interpreters is the main reason for low CGI performance. If the CGI interpreter remains in memory and accepts FastCGI process manager scheduling, it can provide good performance, scalability, etc.
FastCGI has been integrated into IIS7 and also supports IIS6. For the installation method in IIS6, please refer to Microsoft's official documentation. I will briefly translate it here.
First click here to download a 32-bit FastCGI extension for IIS, and then install it. The installed file should be placed in the system32inetsrv directory.
Then open the system32inetsrv directory and execute the following statement, where c:php is your PHP directory and can be modified to other values.
cscript fcgiconfig.js -add -section:"PHP" -extension:php -path:"c:phpphp-cgi.exe"
In Internet Information Services Manager, select the root directory of the website or application, open the directory property page (right-click and select "Properties"), and then select "Home Directory". Click the "Configure" button and select the "Mapping" tab page. Click "Add...", set the "Executable file" to: c:windowssystem32inetsrvfcgiext.dll, set the extension to .php, select "Confirm whether the file exists", and then "OK" to save the settings.
Modify the php.ini file and add the following statement:
fastcgi.impersonate = 1
cgi.fix_pathinfo = 1
cgi.force_redirect = 0
Then open the system32inetsrv directory and execute the following statement:
cscript fcgiconfig.js -set -section:"PHP" -InstanceMaxRequests:10000
cscript fcgiconfig.js -set -section:"PHP" -EnvironmentVars:PHP_FCGI_MAX_REQUESTS:10000
Finally, configure the security of the c:php directory so that the IIS_WPG group has read and execute permissions for this directory.
At this time, PHP based on FastCGI has been successfully configured on IIS6.
The above introduces the three configuration methods and comparisons of the PHP environment in IIS, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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