Category: Programming – Page 2

Upgrade ruby gem

Posted on October 11, 2020 by ServerOk

To upgrade a ruby gem run

gem update --system VERSION_HERE

1	gem update --system VERSION_HERE

Example

gem update --system 1.3.7

1	gem update --system 1.3.7

See Ruby […]

How to Install Visual Studio Code Server

Posted on October 10, 2020 (October 10, 2020) by ServerOk

Code Server allow you to run Microsoft Visual Studio Code in the browser. Code Server runs on a remote web server, you can access it by going to special url. This allow business to move development environment to cloud, deploy new developer environment on cloud or on premise server quickly with automation tools. Developers can […]

PHP APC Cache

Posted on June 2, 2020 (June 2, 2021) by ServerOk

APC Cache is an open source opcode caching module for PHP. You can find documentation for APCu at https://www.php.net/manual/en/book.apcu.php Zend OpCache install apc from yum install apc from source install apc from pecl configure apc in php.ini See PHP […]

HTTP 301 Redirect using PHP

Posted on February 8, 2020 by ServerOk

You can use PHP header() function to do redirect. To do 301 redirect, use

header('Location: https://new-url/', true, 301);
exit;

1 2	header('Location: https://new-url/', true, 301); exit;

For 302 redirect, use

header('Location: https://new-url/');
exit;

1 2	header('Location: https://new-url/'); exit;

If you need to redirect a site to new site keeping same URL structure, you can use

$newUrl = "https://NEW-URL-HERE" . $_SERVER['REQUEST_URI'];
header("HTTP/1.1 301 Moved Permanently");
Header("Location: $newUrl");
exit;

$newUrl = "https://NEW-URL-HERE" . $_SERVER['REQUEST_URI'];

header("HTTP/1.1 301 Moved Permanently");

Header("Location: $newUrl");

exit;

[…]

Redirect a site to HTTPS using PHP

Posted on July 18, 2019 (October 23, 2019) by ServerOk

This PHP script will redirect web site visitor to HTTPS (SSL) url. You can add this in your index.php of the web site

if (empty($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on" ) {
    header("HTTP/1.1 301 Moved Permanently");
    $newUrl = "https://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    Header("Location: $newUrl");
    exit;
}

if (empty($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on" ) {

header("HTTP/1.1 301 Moved Permanently");

$newUrl = "https://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

Header("Location: $newUrl");

exit;

}

Move a site to new URL using PHP

$newUrl = "https://NEW-URL-HERE" . $_SERVER['REQUEST_URI'];
header("HTTP/1.1 301 Moved Permanently");
Header("Location: $newUrl");
exit;

$newUrl = "https://NEW-URL-HERE" . $_SERVER['REQUEST_URI'];

header("HTTP/1.1 301 Moved Permanently");

Header("Location: $newUrl");

exit;

You can also use Apache mod_rewrite .htacess to do the redirection. […]

Gem – Package Manager for Ruby

Posted on February 26, 2019 (February 28, 2019) by ServerOk

gem is package manager for Ruby. To get list of all install packages, run

gem list

gem list

To install a package, run

gem install PACKAGE_NAME

1	gem install PACKAGE_NAME

To uninstall a package, run

gem uninstall PACKAGE_NAME

1	gem uninstall PACKAGE_NAME

To search for a package, run

gem search PACKAGE_NAME

1	gem search PACKAGE_NAME

gem install error libxslt is missing See Ruby […]

GoLang Hello World

Posted on January 5, 2019 (January 5, 2019) by ServerOk

Create a file 1.go with following content

package main

import "fmt"

func main() {
	fmt.Println("My First GoLang Program")
}

package main

import "fmt"

func main() {

fmt.Println("My First GoLang Program")

}

To run the program, use command

go run 1.go

1	go run 1.go

[…]

golang

Posted on January 5, 2019 (January 5, 2019) by ServerOk

Installing golang on Ubuntu 18.04 GoLang Hello World […]

Installing golang on Ubuntu 18.04

Posted on January 5, 2019 by ServerOk

To install golang on Ubuntu 18.04, run

apt install golang -y

1	apt install golang -y

[…]

PHP running system commands with exec

Posted on December 31, 2018 by ServerOk

To execure a system command on a server, use PHP exec function. For example

<?php

@exec("nslookup yahoo.com 2>&1", $result);
echo "<pre>";
print_r($result);

<?php

@exec("nslookup yahoo.com 2>&1", $result);

echo "<pre>";

print_r($result);

See php […]