String Operations

Write a PHP script to:

1. Find the length of string.
2. Count number of words in a string
3. Reverse of a string
4. Search for a specific string

Write a PHP script to find the length of string.

Source Code
LenOfStr.php

<?php
  $string = "Hello how are you?";
  echo("Length of string is: ".strlen($string));
?>

Sample Output

Length of string is: 18

Write a PHP script to count number of words in a string.

NumOfWords.php

<?php
  $string = "Hello how are you?";
  echo("Number of words in a string is ".str_word_count($string));
?>

Sample Output

Number of words in a string is 4

Write a PHP script to reverse of a string.

RevStr.php

<?php
  $string = "Hello how are you?";
  echo("Reverse of string is: ".strrev($string));
?>

Sample Output

Reverse of string is: ?uoy era woh olleH

Write a PHP script to search for a specific string.

SearchString.php

<?php
  $string = "Hello how are you?";
  $substring = "who";
  if(strstr($string,$substring)){
    echo("Substring is found.");
  }else{
    echo("Substring is not found.");
  }
?>

Sample Output

Substring is not found.