Create a Student Gradebook PHP web application that records and displays student's names and grades.

Requirements:

• Overview
  • The application should include a student form to enter a student's name and number grade.
  • The application should display the student names, number grades and letter grades.
• Input
  • Create a form to input the student name and student grade (number grade) and a button to submit the form (2 text boxes and 1 button).
  • The student name is a string.
  • The student grade is a number (from 0 - 100).
  • Validate that the form fields are entered correctly.
• Processing
  • Store students information in an array.
  • Prepopulate the student array with 4 students.
  • When the submit button is pressed,
    • either add the new student (name and grade) to the end of the array
    • or update the existing student grade in the array.
  • Calculate an adjusted grade for each student by adding 10%.
  • Convert the number grade to a letter grade as follows.
    • returns 'A' if grade is greater than or equaled to 90
    • returns 'B' if grade is in the range of 80 through 89
    • returns 'C' if grade is in the range of 70 through 79
    • returns 'D' if grade is in the range of 60 through 69
    • returns 'F' if grade is less 60
• Output
  • The student display should show all of the students in the array.
  • So the display will always show the 4 students that were prepopulated.
  • Then the display will also show any student that is added using the student form.
  • The student display should show the following in an HTML table format, one row per student with the following fields on each row.
    • the student name
    • the original student grade (number grade)
    • the letter grade for the original grade
    • the adjusted student grade (number grade)
    • the letter grade for the adjusted grade
  • Display the number of students.
  • Add up all of the student original grades and display the total.
  • Calculate the average of the student original grades and display the average.
  • Display a var_dump of the student array (for debugging).

• Hint:
  • You may use the sort.php (Script 7.5) code as an example for the student array.
  • Sorting is not necessary but maybe included if you'd like.
  • Since the student list is not being saved between requests, it will reset each time the form is submitted.

  • // Address error management, if you want.

    // Create the array: $grades = [ 'Richard' => 95, 'Sherwood' => 82, 'Toni' => 98, 'Franz' => 87, 'Melissa' => 75, 'Roddy' => 85 ];

    // Print the original array: print '

    Originally the array looks like this: '; foreach ($grades as $student => $grade) { print "$student: $grade "; } print '

    ';

    // Sort by value in reverse order, then print again: arsort($grades); print '

    After sorting the array by value using arsort(), the array looks like this: '; foreach ($grades as $student => $grade) { print "$student: $grade "; } print '

    ';

    // Sort by key, then print again: ksort($grades); print '

    After sorting the array by key using ksort(), the array looks like this: '; foreach ($grades as $student => $grade) { print "$student: $grade "; } print '

    ';

    ?>