带有空格的十六进制的正则表达式

Question

Im trying to figure out why this regex doesn't match this line, but i have no more ideas.

(?:([a-zA-Z0-9]{2})\s\s)+
53  65  72  76  65  72  3a  20  41  70  61  63  68  65  00  45  

but this doesn't catch all the hex bytes ...

UPD: i need to catch every bite into preg_match $results

Answer 1

That regex does match that line, assuming that the line you've pasted into your question is exactly the line you're matching against:

<?php
$hex = "53  65  72  76  65  72  3a  20  41  70  61  63  68  65  00  45  ";

preg_match('/(?:([a-zA-Z0-9]{2})\s\s)+/', $hex, $matches);
var_dump($matches);

Output:

array(2) {
  [0]=>
  string(64) "53  65  72  76  65  72  3a  20  41  70  61  63  68  65  00  45  "
  [1]=>
  string(2) "45"
}

Most likely what you're trying to do is to get an array of the individual hex bytes, though, so if you're using code similar to the above with that regex, then you're doing it wrong. It should be something like this, instead:

preg_match_all('/([a-zA-Z0-9]{2})\s{2}/', $hex, $matches);
// $matches[1] will be your array of hex bytes