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Variables in Bash ": command not found"

Bash is like the very complicated language, even a space can make a syntax error. But, when you get into it often, you will get a hang of it and it will be easy. This post is a solution to one of the most common problems that happen to a newbie in Bash and it’s about a single whitespace. Here is a sample Bash file : a = 50 echo $a and when you execute it, the error will be as follows :


Check If A String Is JSON in PHP

In my previous post, I gave the isHTML function that returns if a string is HTML or not. In this post, I will give you a simple function of different ways that helps in the detection of valid JSON string in PHP. The function I’m giving are fast, easy and doesn’t take up too much CPU memory. Demo Method 1 JSON (JavaScript Object Notation) can be made in to a PHP object using json_decode.


Create Your Own URL Shortening Service Using PHP & jQuery

I made a URL shortening service a year back using PHP & jQuery. It was pretty simple. You should know the concept of URL Shortening. The concept is simple. When a user sends a request to short a URL, PHP will check if the URL is valid. If it’s valid then PHP will make a string of 5 or 6 characters. A folder is created with the name of this string and an index.php file with header function code is created in this folder.


How to display errors in a PHP file ?

When you code PHP some errors might have happened. But you won’t know that and the program don’t work. You can use PHP‘s error_reporting function to display errors. Here’s how to do it: Create a file named errors.php in the folder where the file with errors exist. Open the errors.php file in text editor and paste these codes in the file: error_reporting(E_ALL);ini_set("display_errors", 1);include("filename.php");? Replace filename.php with the name of the file that has errors.





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