Using the combination of HTML and PHP, implement a web page where the users can upload a text file, exclusively in .txt format, which contains a string of 1000 numbers, such as:

71636269561882670428252483600823257530420752963450
85861560789112949495459501737958331952853208805511
65727333001053367881220235421809751254540594752243
52584907711670556013604839586446706324415722155397
53697817977846174064955149290862569321978468622482
83972241375657056057490261407972968652414535100474
82166370484403199890008895243450658541227588666881
96983520312774506326239578318016984801869478851843
12540698747158523863050715693290963295227443043557
66896648950445244523161731856403098711121722383113
05886116467109405077541002256983155200055935729725
16427171479924442928230863465674813919123162824586
17866458359124566529476545682848912883142607690042
24219022671055626321111109370544217506941658960408
07198403850962455444362981230987879927244284909188
84580156166097919133875499200524063689912560717606
62229893423380308135336276614282806444486645238749
73167176531330624919225119674426574742355349194934
30358907296290491560440772390713810515859307960866
70172427121883998797908792274921901699720888093776

Your code should contain a PHP function that, accepting the string of 1000 numbers in input, is able to:

1) Find the 5 adjacent numbers that multiplied together give the largest product.

2) Given the product from above, computes the sum of the factorial of each term of such product.

Example, if the product is 5046, computes 5! + 0! + 4! + 6!

Test these conditions below

• Add a tester function to check the behavior of your PHP function.

• If the file doesn't contain 1000 numbers or contains some characters in between, it should be discarded and the application should inform the user that the file is not formatted correctly.
• The output of this file should be 40824 as the largest product and 40371 as the factorial sum of the product.

Answer rating: 100% (QA)

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