About sql and str_replace function - php

Question

First of all, thanks to everyone for helping me, and please apologize my English, I'm trying to do the best :)
This is what I wanna do:
I have a table in MySQL database, named acciones, I want to every "action" registered in that table make a replace in the text printed on screen:
<?php
include('../procesos/abre_conexion.php');
$query99 = "SELECT * from acciones";
// This line make the query
$result99 = mysql_query($query99);
$registro99 = mysql_fetch_array($result99)
?>
<?php
// create the function
function howls($valor) {
// set the variable // saving as array // possible texts
$variables = array('$registro99[original]',);
// $imagenes, tambien contendra un array
// with the replace text
$sus = array('$registro99[reemplazo]',);
// making the replace
return (str_replace($variables, $sus, $valor));
}
// starting function
ob_start("howls");
?>
#SalirA beber Cerveza Montoro en barrio santo con Andreita.
<?php
// ending function
ob_end_flush();
?>
<? include('../procesos/cierra_conexion.php'); ?>
But it don't works, any suggestion?

Answer 1

Firstly, you should NOT be using the mysql_* functions. They are deprecated and completely removed from PHP7.
As to what is happening with your code. You shouldn't single quote the $registro variables. If you do need them quoted for some reason, you need to double-quote them.
function howls($valor) {
// set the variable // saving as array // possible texts
$variables = array("{$registro99[original]}",);
// $imagenes, tambien contendra un array
// with the replace text
$sus = array("{$registro99[reemplazo]}",);
// making the replace
return (str_replace($variables, $sus, $valor));
}