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Caldeiro
Asked: 2020-12-24 12:57:28 +0800 CST 2020-12-24 12:57:28 +0800 CST

Check alphabet array until I have to go back PHP

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<?php

$abc = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","x","y","z");
$valores = array("luna","sol","abrir","acceso");

$contador = 0;
$result = array();

foreach ($valores as $value){

    for ($i = 0; $i < strlen($value); $i++) {

        $letra = $value[$i];

        for($z = 0; $z < sizeof($abc); $z++){

            if($abc[$z] === $letra){

                echo $letra; // Debug

            }

        }

    }
    $contador++;

}

I have this code that checks that each letter of each word in the array values ​​against the abc array . On echo letrascreen printing the result lunasolabriaccess . It checks it well, in that same piece of code I want to do what I am going to explain next and I don't know where to start.

As you can see there is a result array that is not being used at any time. In that array I want to save the words moon, sun .... from the values ​​array but with the condition only save until in the abc array I don't have to go back in the dictionary.

So the result should be:

mon, s, apr, acces

I don't know if I explained it well, since it is somewhat complex to explain. If there is any doubt I will try to express myself better. I don't know how to start doing this. Thank you

php

1 Answers

  1. Best Answer

    Well, as far as I could understand, you want new words to be assembled according to the order of the alphabet and when a letter does not match the order, it stops and goes to the other word.

    I made some modifications to your code, I leave it commented so that you understand what I did, in any case, if you have any doubts, do not hesitate to contact me.

    Here the code:

    $abc = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","x","y","z");
$valores = array("luna","sol","abrir","acceso");
$result = array(); // Variable para almacenar las nuevas paabras

foreach ($valores As $valor) {
    $indexABC = 0; // Declaramos el indexABC para controlar que el abcdario solo se inicie una vez por palabra
    $nuevaPalabra = ''; // Aqui se almacena la palabra armada sin el retroceso del abcdario
    for ($i = 0; $i < strlen($valor); $i++) {
        $letra = $valor[$i];
        while ($indexABC < count($abc)) {
            if ($letra == $abc[$indexABC]) {
                $nuevaPalabra .= $letra; // Concatenamos la letra encontrada
                break; // Una vez encontramos la letra con esto pasamos a la siguiente (Cortamos el ciclo while)
            }
            $indexABC++;
        }
    }
    $result[] = $nuevaPalabra; // Agregamos las palabras armadas a la variable result
}

print_r($result); // Finalmente mostramos el array de resultado

    Departure:

    Array ( [0] => lu [1] => s [2] => abr [3] => access )

    Just one observation in your example you put that the result of moon should be lun but the correct thing would be lu since n is before u .

    Greetings. ;)

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