Merge pull request mouredev#7790 from Jeyker-Dev/main

##4 - PHP - Jeyker-Dev.php

Author: Roswell468

Roadmap/04 - CADENAS DE CARACTERES/php/Jeyker-Dev.php

@@ -0,0 +1,146 @@
+<?php
+
+/*
+* EJERCICIO:
+* Muestra ejemplos de todas las operaciones que puedes realizar con cadenas de caracteres
+* en tu lenguaje. Algunas de esas operaciones podrían ser (busca todas las que puedas):
+* - Acceso a caracteres específicos, subcadenas, longitud, concatenación, repetición, recorrido,
+*   conversión a mayúsculas y minúsculas, reemplazo, división, unión, interpolación, verificación...
+*
+* DIFICULTAD EXTRA (opcional):
+* Crea un programa que analice dos palabras diferentes y realice comprobaciones
+* para descubrir si son:
+* - Palíndromos
+* - Anagramas
+* - Isogramas
+*/
+
+$string = "String";
+$string_2 = "    String 2";
+$string_3 = "Another";
+
+// Returns the length of the string
+echo "The length of string is ".strlen($string).".\n";
+
+// Makes a string to lowercase
+echo strtolower($string).".\n";
+
+// Makes a string to uppercase
+echo strtoupper($string).".\n";
+
+// Return a part of the string
+echo substr($string,0,3).".\n";
+
+// Replace all occurrences of the search string with the replacement string
+echo str_replace("String", "Hola", $string).".\n";
+
+// Returns a string with the first character of str lowercase if that character is alphabetic.
+echo lcfirst($string)."\n";
+
+// Removes whitespace (or other characters) from the beginning of a string.
+echo trim($string_2)."\n";
+
+// Returns the reversed string
+echo strrev($string)."\n";
+
+class Funcionality
+{
+    public function palindromes(string $word_1, string $word_2): string
+    {
+        $word_1 = trim($word_1);
+        $word_2 = trim($word_2);
+
+        $convert_word = $this->toLowerAndReversed($word_1);
+        $convert_word_2 = $this->toLowerAndReversed($word_2);
+
+        if($convert_word === $word_1) {
+            echo "The First Word is a Palindrome.\n";
+        }
+
+        if($convert_word_2 === $word_2) {
+            echo "The Second Word is a Palindrome.\n";
+        }
+
+        return "The words ain't palindromes.\n";
+    }
+
+    public function anagrams(string $word_1, string $word_2): string
+    {
+        $word_1 = strtolower(trim($word_1));
+        $word_2 = strtolower(trim($word_2));
+
+        $sorted_word_1 = $this->sortString($word_1);
+        $sorted_word_2 = $this->sortString($word_2);
+
+        if ($sorted_word_1 === $sorted_word_2) {
+            return "The words are anagrams.\n";
+        } else {
+            return "The words are not anagrams.\n";
+        }
+    }
+
+    public function isograms(string $word_1, string $word_2)
+    {
+        $word_1 = strtolower(trim($word_1));
+        $word_2 = strtolower(trim($word_2));
+
+        $letters = str_split($word_1);
+        $letters_2 = str_split($word_2);
+
+        $is_isogram = $this->hasRepeatingLetters($letters);
+        $is_isogram_2 = $this->hasRepeatingLetters($letters);
+
+        if($is_isogram === true) {
+            echo "The First Word is a Isogram.\n";
+        }
+
+        if($is_isogram_2 === true) {
+            echo "The Second Word is a Isogram.\n";
+        }
+    }
+
+    public function hasRepeatingLetters(array $letters): bool
+    {
+        foreach ($letters as $letter => $count) {
+            if ($count > 1) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private function sortString(string $word): string
+    {
+        $letters = str_split($word);
+        sort($letters);
+        return implode('', $letters);
+    }
+
+    public function toLowerAndReversed(string $word): string
+    {
+        $lower_word = strtolower($word);
+        return $reversed_word =  strrev($lower_word);
+    }
+}
+
+$instance = new Funcionality();
+
+$instance->isograms($string,$string_3);
+
+echo "This is a program where you write two words and then it will analyze if the words are palindromes, anagrams or isograms.\n";
+
+echo "Write the first word: ";
+$word_1 = fgets(STDIN);
+
+echo "Write the second word: ";
+$word_2 = fgets(STDIN);
+
+
+
+$instance->palindromes($word_1, $word_2);
+$instance->anagrams($word_1, $word_2);
+$instance->isograms($word_1, $word_2);
+
+
+