Return last characters from a string in PHP

Question

I’m trying to incorporate some financial information from Infomoney into my application, and in the Investment Fund part it gives the ranking of the main portfolios. Only it returns the following string:

1º MCR-PRINCIPAL EQUITY INVESTMENT FUND +97,01%

I needed to blow this up string in 3 parts:

1st ranking of the portfolio second name of the wallet 3rd rate of return

I’m using this script:

if(!$fp=fopen("https://www.infomoney.com.br/mercados/fundos" , "r" )) 
{
    echo "Erro ao abrir a página de indices" ;
    exit;
}
$conteudo = '';
while(!feof($fp)) 
{ 
    $conteudo .= fgets($fp,1024);
}
fclose($fp);

$valorCompraHTML    = explode('class="numbers">', $conteudo); 
$ibovespa = trim(strip_tags($valorCompraHTML[$campo]));
$ibovespa = preg_replace(array("/\t/", "/\s{2,}/", "/\n/", "/\r/"), array("", " ", " ", " "), $ibovespa);
$ibovespa = explode(' ', $ibovespa);
$cart = trim($ibovespa[$explo]);

I have already found several articles about returning the first characters of a string. But how to return the last 8? I even found something on the Internet, but I couldn’t interpret it. The code was like this:

set @p = (SELECT LOCATE('+', '$xcart'));
SELECT SUBSTRING( 'xcart' , @p - 1 , @p + 5 );

Answer 1

I made this function to test and is returning me the last 8 elements of a string:

$get = $_GET['id'];

if(2==2)
{
    echo ultimos8($get);
}

function ultimos8($value)
{
    $var = $value;
    $tamanhoVar = mb_strlen($var);
    var_dump($tamanhoVar);
    $ultimos8 = substr($var, -8);
    $tamanhoVar8 = mb_strlen($ultimos8);
    var_dump($tamanhoVar8);
    var_dump($ultimos8);
}

The function that takes the last 8 values is the substr, I even left with the var_dumps for you to test if you want.

Just what it takes to work:

function ultimos8($value)
{
    $var = $value;
    $ultimos8 = substr($var, -8);

    return $ultimos8;
}

What do you need:

<?php
$value = '1º MCR-PRINCIPAL FUNDO DE INVESTIMENTO EM AÇÕES +97,01%';

if(2==2)
{
    echo ultimos8($value);
}

function ultimos8($value)
{
    $var = $value;
    $ultimos8 = substr($var, -8);

    return $ultimos8;
}
?>

Answer 2

Look, you can use a regular expression to get the information in a much simpler way, would this be it:

<?php
  $string = "1º MCR-PRINCIPAL FUNDO DE INVESTIMENTO EM AÇÕES +97,01%";
  preg_match("#(\d[^-]+)-(.*)([+-].*)#", $string, $matches);
  list($textMatch, $ranking, $nome, $indice) = $matches;

   print "1ª ranking da carteira: $ranking, 2ª nome da carteira: $nome, 3ª índice de rentabilidade: $indice";

Hug, and be happy, expressão regular (regex) will save your life whenever you allow rsrsrs.

But to answer your question exactly, just use the -, what would turn out like this:

<?php
  $string = "1º MCR-PRINCIPAL FUNDO DE INVESTIMENTO EM AÇÕES +97,01%";
  echo substr($string, -8); //Pegando apenas os últimos 8 caracters