1.Write a PHP script to print prime numbers between 1-50 ?

2.Find the length of a string by using PHP ?

3.Count no of words in a string by using PHP ?

4.Reverse a string by using PHP ?

5.Search for a specific string by using PHP ?

6.Write a PHP script to merge two arrays and sort them as numbers, in descending order ?

7.Write a PHP script that reads data from one file and write into another file ?