Question

How to check if a string is pangram in PHP

Answer 1

function isStringPangram($str) {
    // array_fill(int $start_index, int $count, mixed $value): array
    $letters = array_fill(0, 26, 0);
    $size = strlen($str);
 
    for ($i = 0; $i < $size; $i++) {
        if (ctype_upper($str[$i])) {
           $letters[ ord($str[$i]) - ord('A') ]++;
        }
        else if (ctype_lower($str[$i])) {
           $letters[ ord($str[$i]) - ord('a') ]++;
        }
     }
  
    for ($i = 0; $i < 26; $i++) {
        if ($letters[$i] == 0)
            return false;
    }
     
    return true;
}
 
$str = "The quick brown fox jumps over the lazy dog";
     
if (isStringPangram($str) == true)
    echo "string is a Pangram";
else
    echo "string is not a Pangram";

 
 
 
 
/*
run:
 
string is a Pangram
 
*/

 

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