Write and test PHP scripts for the two exercises that follow, debug (if necessary).  When required to write a function, you must include a script to test the function with at least two different data sets.  In all cases, for testing, you must write an HTML file that references the PHP file(s). For this Exercise write a function and the code to test with the following requirements.  Write a function that takes a parameter of a string of numbers separated by spaces.  The function will return a value of the first four-digit number in the string and false if none.   Write an HTML document that includes an anchor tag that calls a PHP document.  Also, write the called PHP script document, which returns a randomly chosen greeting from a list of five different greetings.  The greeting must be stored as constant strings in the script.  A random number between 0 and 4 can be computed with these lines: # Set the seed for mtrand with the number of microseconds #  since the last full second of the clock mt_strand ( (double)microtime()  *  1000000); $number = mtrand(0,  4) ; # Computes a random integer 0-4

Write and test PHP scripts for the two exercises that follow, debug (if necessary).  When required to write a function, you must include a script to test the function with at least two different data sets.  In all cases, for testing, you must write an HTML file that references the PHP file(s).

• For this Exercise write a function and the code to test with the following requirements.  Write a function that takes a parameter of a string of numbers separated by spaces.  The function will return a value of the first four-digit number in the string and false if none.
•  
• Write an HTML document that includes an anchor tag that calls a PHP document.  Also, write the called PHP script document, which returns a randomly chosen greeting from a list of five different greetings.  The greeting must be stored as constant strings in the script.  A random number between 0 and 4 can be computed with these lines:
  # Set the seed for mtrand with the number of microseconds
  #  since the last full second of the clock
  mt_strand ( (double)microtime()  *  1000000);
  $number = mtrand(0,  4) ; # Computes a random integer 0-4