在PHP中提取部分字符串

Question

I have a string (message) and its values change for each transaction. Here is the sample string:

"Your transaction was successful. Transaction ID: 453712046. Reference code: 1234326. Thank you!"

How can I extract the Transaction ID to a variable $transID and the Reference code to the variable $refCode as integer values every time a transaction is made?

Thanks!

Answer 1

This is easily solved with a small bit of regex:

<?php

$str = "Your transaction was successful. Transaction ID: 453712046. Reference code: 1234326. Thank you!";
preg_match_all('#Reference code: (\d+)|Transaction ID: (\d+)#', $str, $matches);

$refCode = $matches[1][1];
$transID = $matches[2][0];

?>

preg_match_all() performs a global regular expression match on the string. Meaning it won't stop after the first match.

Reference code: and Transaction ID: will match the literal strings.
\d Matches a digit ranging from 0-9.
+ Matches between one and unlimited times, as many times as possible, giving back as needed

So this means it will match any number after Reference code: and Reference code: for as long as it's not interupted by a non-digital character.