How to Implement frontend and backend interconnection with 5-perl in the Age of small

Source: Internet
Author: User
Tags scalar perl script
Perl "glue" can combine code from various applications or languages. Perl can write common scripts, CGI Modules can be used to write web applications, and DBI can be used to access various databases. In addition, Perl can stick applications of various levels together to provide more powerful functions. If the front-end is a website Web application, the underlying or background is written in C, C ++, or Java, Perl can be used to connect the two to achieve more powerful functions, give full play to their respective advantages. There are two ways to implement this method in Perl: 1) directly embed code written in other languages in the Perl script. This can be done using Perl-related modules, which is relatively simple: inline, the more powerful, but slightly more complex, is Xs and so on. 2) Another method is to use the Perl system to call the function system, such as: use strict; my $ file = "test.txt"; System ("Edit $ file "); # Call the DOS edit tool system ("dir"); another method: QX {dir}; capture the returned results, you can assign the results to a scalar or a list array, if the scalar value is used, the final character of the result is the same. If the array is used, each element corresponds to each row of the result. For example, use strict; my @ result = QX {dir}; my $ eachline; foreach $ eachline (@ result) {print "$ eachline" ;}you can also write your own EXE, it is then called by the Perl system function (or QX. For example, you can write an EXE program that can be used to input parameters: Main. C # include <stdio. h> # include <stdlib. h> int main (INT argc, char ** argv) // int main (INT argc, char * argv []) {int I; for (I = 0; I <argc; I ++) {printf ("% D Arg is % s", I, argv [I]);} return 0 ;} // The main function of the program is to print the parameters passed to the main function. Example :#! /Usr/bin/perl use strict; my @result?qx=main.exe Hello Iam here}; my $ eachline; foreach $ eachline (@ result) {print "$ eachline ";}

 

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How to Implement frontend and backend interconnection with 5-perl in the Age of small

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