phparraysreplace

Replace whole music notes in string using a "find" array and a "replace" array

I've have a problem with preg_replace() using arrays.

Basically, I'd like to transpose this string:

$string = "Dm F Bb F Am";

To

$New_string = "F#m D D A C#m";

Here is what I do:

$Find = Array("/Dm/", "/F/", "/Bb/", "/Am/", "/Bbm/", "/A/", "/C/");
$Replace = Array('F#m', 'A', 'D', 'C#m', 'Dm', 'C#', 'E');
$New_string = preg_replace($Find, $Replace, $string);

But I get this result instead:

E##m E# D E# E#m

Problem is that every match is replaced by the following, something like this happens (example for E##m):

Dm -> F#m -> A#m -> C##m -> E##m

Is there any solution to simply change Dm to F#m, F to A, etc ?

Solution

  • You could use strtr():

    <?php
    $string = "Dm F Bb F Am";
    $Find = Array('Dm', 'F', 'Bb', 'Am', 'Bbm', 'A', 'C');
    $Replace = Array('F#m', 'A', 'D', 'C#m', 'Dm', 'C#', 'E');

    $New_string = strtr($string, array_combine($Find, $Replace));

    echo $New_string;

    // F#m A D A C#m