子串正好在另一个子串之后

Question

So I have this big string, which includes in the middle the following:

"(...) Status: Ativo
Identificador: F36CE5
Meio de Pagamento: Cartão de crédito
Data de contratação: 25/03/2015
Data de expiração: 25/03/2017 (...)"

* the "(...)" is just to identify that there are more content before and after this part

My goal is to isolate only the part right after "Identificador:", i.e., I need to grab the value "F36CE5" (which is different every time, of course) and set it to a variable.

I tried the following code:

$initialString = "Status: Ativo
Identificador: F37CE5
Meio de Pagamento: Cartão de crédito
Data de contratação: 25/03/2015
Data de expiração: 25/03/2017";


$arr = explode(":", $initialString);
$important = $arr[2];
echo $important;

But with this I am getting

F37CE5
Meio de Pagamento

What should I do to get only F37CE5?

Is there a way to tell PHP: "Give the string that is right after 'Identificador:', and nothing more" ?

Answer 1

Use regular expression. Something like:

<?php
$pattern = '/Identificador: (\w+)/';
preg_match($pattern, $initialString, $matches);
print_r($matches[1]);
?>

$matches[1] will contain the string you are looking for.