<?php
$text = "<ignore this> but <capture@this.one>
<and also capture><this@one.too>";
// set up the regexp:
$qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
$dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
$atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c'.
'\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
$quoted_pair = '\\x5c[\\x00-\\x7f]';
$domain_literal = "\\x5b($dtext|$quoted_pair)*\\x5d";
$quoted_string = "\\x22($qtext|$quoted_pair)*\\x22";
$domain_ref = $atom;
$sub_domain = "($domain_ref|$domain_literal)";
$word = "($atom|$quoted_string)";
$domain = "$sub_domain(\\x2e$sub_domain)*";
$local_part = "$word(\\x2e$word)*";
$addr_spec = "$local_part\\x40$domain";
// Do it:
preg_match_all("/(?<=<)$addr_spec(?=>)\b/", $text, $matches);
// Show results:
echo "<pre>".print_r($matches[0], 1)."</pre>";
/*
Output:
Array
(
[0] => capture@this.one
[1] => this@one.too
)
*/
?>
