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Hacker Rank "Designer PDF Viewer" Solution

Problem : -----
When you select a contiguous block of text in a PDF viewer, the selection is highlighted with a blue rectangle. In this PDF viewer, each word is highlighted independently. For example:
PDF-highighting.png
In this challenge, you will be given a list of letter heights in the alphabet and a string. Using the letter heights given, determine the area of the rectangle highlight in  assuming all letters are  wide.
For example, the highlighted . Assume the heights of the letters are  and . The tallest letter is  high and there are  letters. The hightlighted area will be  so the answer is .
Function Description
Complete the designerPdfViewer function in the editor below. It should return an integer representing the size of the highlighted area.
designerPdfViewer has the following parameter(s):
  • h: an array of integers representing the heights of each letter
  • word: a string
Input Format
The first line contains  space-separated integers describing the respective heights of each consecutive lowercase English letter, ascii[a-z]. 
The second line contains a single word, consisting of lowercase English alphabetic letters.
Constraints
  • , where  is an English lowercase letter.
  •  contains no more than  letters.
Output Format
Print a single integer denoting the area in  of highlighted rectangle when the given word is selected. Do not print units of measure.
Sample Input 0
1 3 1 3 1 4 1 3 2 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
abc
Sample Output 0
9
Explanation 0
We are highlighting the word abc:
Letter heights are ,  and . The tallest letter, b, is  high. The selection area for this word is .
Note: Recall that the width of each character is .
Sample Input 1
1 3 1 3 1 4 1 3 2 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 7
zaba
Sample Output 1
28
Explanation 1
The tallest letter in  is  at .
Solution : --------
<?php
/* Write your PHP code here */
//Height of each english alphabet.
$h = array(1,3,1,2,4,6,4,3,5,3,7,8,6,5,3,0,0,8,7,5,4,3,7,4,3,7);
//String is given
$word = "abc";
$arr = array();
$a = 0;
$len = 0;
$value = 0;
$ans = 0;
for($i=0;$i<strlen($word);$i++){
$len = ord(strtolower($word[$i]))-97; // a= 1, z= 26, 
$value = $h[$len];
$arr[$i] = $value;
}
rsort($arr);
$a = $arr[0];
$ans = $a * strlen($word);
echo $ans; // Area of the word
?>
ajay yadav expo
Ajayyadavexpo

Thank you

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