There are softwares already that helps to replace a string in a file. Suppose, if you’re making a program that requires saving some data in to a file. By “adding”, the program is actually replacing a word. Let’s see how it’s done in PHP & Python.

This is the file where we are going to replace the word :

thisWord
I got thisWord for making it thatWord
replace thisWord already my friend.

We replace the word “thisWord” to “thatWord” containing in this file.

Palindromes are unique words that are read the same forward and backward. We can identify them using out eyes and brain. How about we identify using a simple program in PHP & Python ?

PHP

<?php
$word = strtolower("Malayalam");
$splitted = str_split($word);
$reversedWord = "";
$length = strlen($word);
for($i = 0; $i < $length; $i++)
	$reversedWord .= $splitted[$length - $i - 1];
echo $word == $reversedWord ? "It's a palindrome !n" : "It's not a palindromen";
?>

Instead of the loop to reverse the word, you can also use :

In PHP you can generate random number by using rand function, but there is no specific function to generate a random text or string. In this post I’m going to show the function that will generate a random string of length mentioned.

Here is the function:

function rand_string($length) {
 $str="";
 $chars = "subinsblogabcdefghijklmanopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 $size = strlen($chars);
 for($i = 0;$i < $length;$i++) {
  $str .= $chars[rand(0,$size-1)];
 }
 return $str;
}

Usage

To generate a random string use rand_string() function with the parameter of length of the to be generated string. Here’s an example: