Online PHP editor | output for KZgKY

@ 2020-10-06T17:08:20Z

<?php

$extractor = function ($str) {
    $str = preg_replace('/\s*(?:\[at]|@)\s*/', '@', $str);
    $str = preg_replace('/\s*\(dot\)\s*/', '.', $str);
    $regexp = '/\b[a-z0-9_.-]+@(?:[a-z0-9-]+\.)+[a-z0-9]{2,4}\b/i';
    preg_match_all($regexp, $str, $m);
    return isset($m[0]) ? $m[0] : [];
};

$test_string = 'This is a test string...
    test1@example.org
    Test different formats:
    test2@example.org;
    <a href="test3@example.org">foobar</a>
    <test4@example.org>
        strange formats:
    test5@example.org
    test6[at]example.org
    test7@example.net.org.com
    test8@ example.org
    test9@!foo!.org
    test10.abc [at] hello (dot) com
        foobar
';

print_r( $extractor($test_string) );

Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.16, 8.5.0 - 8.5.1: Array ( [0] => test1@example.org [1] => test2@example.org [2] => test3@example.org [3] => test4@example.org [4] => test5@example.org [5] => test6@example.org [6] => test7@example.net.org.com [7] => test8@example.org [8] => test10.abc@hello.com )
Output for 8.3.28: /bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28)
Process exited with code 1.

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