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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | // This is an example of the ViaThinkSoft AntiSpam 3.02 |
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| 4 | // for ViaThinkSoft Sigma as filter plugin (modified $content) |
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| 5 | // Use it for your website! |
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| 6 | |||
| 7 | // CONFIGURATION |
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| 8 | |||
| 9 | define('CFG_MAKE_MAIL_ADDRESSES_CLICKABLE', true); |
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| 10 | |||
| 11 | // CODE |
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| 12 | |||
| 13 | function secure_email_triv($email) |
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| 14 | { |
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| 15 | if (!function_exists('alas_js_crypt')) |
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| 16 | { |
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| 17 | function alas_js_crypt($text) |
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| 18 | { |
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| 19 | $tmp = ''; |
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| 20 | for ($i=0; $i<strlen($text); $i++) |
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| 21 | { |
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| 22 | $tmp .= 'document.write("&#'.ord(substr($text, $i, 1)).';");'; |
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| 23 | } |
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| 24 | return $tmp; |
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| 25 | } |
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| 26 | } |
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| 27 | |||
| 28 | $aus = ''; |
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| 29 | if ($email != '') |
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| 30 | { |
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| 31 | $aus .= '<script language="JavaScript" type="text/javascript"><!--'."\n"; |
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| 32 | $aus .= alas_js_crypt($email); |
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| 33 | $aus .= '// --></script>'; |
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| 34 | } |
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| 35 | return $aus; |
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| 36 | } |
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| 37 | |||
| 38 | // PHP-AntiSpam-Funktion "secure_email", Version 3.02 |
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| 39 | // von Daniel Marschall [www.daniel-marschall.de] |
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| 40 | |||
| 41 | function secure_email($email, $linktext, $crypt_linktext) |
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| 42 | { |
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| 43 | // No new lines to avoid a JavaScript error! |
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| 44 | $linktext = str_replace("\r", ' ', $linktext); |
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| 45 | $linktext = str_replace("\n", ' ', $linktext); |
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| 46 | |||
| 47 | if (!function_exists('alas_js_crypt')) |
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| 48 | { |
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| 49 | function alas_js_crypt($text) |
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| 50 | { |
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| 51 | $tmp = ''; |
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| 52 | for ($i=0; $i<strlen($text); $i++) |
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| 53 | { |
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| 54 | $tmp .= 'document.write("&#'.ord(substr($text, $i, 1)).';");'; |
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| 55 | } |
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| 56 | return $tmp; |
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| 57 | } |
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| 58 | } |
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| 59 | |||
| 60 | if (!function_exists('alas_js_write')) |
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| 61 | { |
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| 62 | function alas_js_write($text) |
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| 63 | { |
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| 64 | $text = str_replace('\\', '\\\\', $text); |
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| 65 | $text = str_replace('"', '\"', $text); |
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| 66 | $text = str_replace('/', '\/', $text); // W3C Validation </a> -> <\/a> |
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| 67 | return 'document.write("'.$text.'");'; |
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| 68 | } |
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| 69 | } |
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| 70 | |||
| 71 | $aus = ''; |
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| 72 | if ($email != '') |
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| 73 | { |
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| 74 | $aus .= '<script language="JavaScript" type="text/javascript"><!--'."\n"; |
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| 75 | $aus .= alas_js_write('<a href="'); |
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| 76 | $aus .= alas_js_crypt('mailto:'.$email); |
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| 77 | $aus .= alas_js_write('">'); |
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| 78 | $aus .= $crypt_linktext ? alas_js_crypt($linktext) : alas_js_write($linktext); |
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| 79 | $aus .= alas_js_write('</a>').'// --></script>'; |
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| 80 | } |
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| 81 | return $aus; |
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| 82 | } |
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| 83 | |||
| 84 | function getAddrSpec() { |
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| 85 | // Ref: http://www.iamcal.com/publish/articles/php/parsing_email/ |
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| 86 | |||
| 87 | $qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]'; |
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| 88 | $dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]'; |
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| 89 | $atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c'. |
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| 90 | '\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+'; |
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| 91 | $quoted_pair = '\\x5c[\\x00-\\x7f]'; |
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| 92 | $domain_literal = "\\x5b($dtext|$quoted_pair)*\\x5d"; |
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| 93 | $quoted_string = "\\x22($qtext|$quoted_pair)*\\x22"; |
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| 94 | $domain_ref = $atom; |
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| 95 | $sub_domain = "($domain_ref|$domain_literal)"; |
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| 96 | $word = "($atom|$quoted_string)"; |
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| 97 | $domain = "$sub_domain(\\x2e$sub_domain)*"; |
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| 98 | $local_part = "$word(\\x2e$word)*"; |
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| 99 | $addr_spec = "$local_part\\x40$domain"; |
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| 100 | |||
| 101 | return $addr_spec; |
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| 102 | } |
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| 103 | |||
| 104 | function is_valid_email_address($email){ |
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| 105 | $addr_spec = getAddrSpec(); |
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| 106 | return preg_match("!^$addr_spec$!", $email) ? true : false; |
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| 107 | } |
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| 108 | |||
| 109 | function auto_secure_mail_addresses($content) { |
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| 110 | $addr_spec = getAddrSpec(); |
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| 111 | |||
| 112 | // Step 1: Parse links and make them secure |
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| 113 | |||
| 114 | if (!function_exists('link_cb_1')) { |
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| 115 | function link_cb_1($a) { |
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| 116 | $mailaddr = $a[2]; |
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| 117 | $linktext = $a[14]; // Letztes |
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| 118 | |||
| 119 | return secure_email($mailaddr, $linktext, is_valid_email_address($linktext)); |
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| 120 | } |
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| 121 | } |
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| 122 | |||
| 123 | $content = preg_replace_callback("/<a(.+?)mailto:($addr_spec)(.+?)>(.+?)<\/a>/sm", 'link_cb_1', $content); // TODO! Kann Greedy werden! |
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| 124 | |||
| 125 | // Step 2: Find all further mail addresses, make then clickable and prevent spam bots |
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| 126 | |||
| 127 | if (!function_exists('link_cb_2')) { |
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| 128 | function link_cb_2($a) { |
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| 129 | $mailaddr = $a[1]; // Letztes |
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| 130 | |||
| 131 | if (CFG_MAKE_MAIL_ADDRESSES_CLICKABLE) { |
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| 132 | return secure_email($mailaddr, $mailaddr, true); |
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| 133 | } else { |
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| 134 | return secure_email_triv($mailaddr); |
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| 135 | } |
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| 136 | } |
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| 137 | } |
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| 138 | |||
| 139 | $content = preg_replace_callback("/($addr_spec)/sm", 'link_cb_2', $content); |
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| 140 | |||
| 141 | // Output |
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| 142 | |||
| 143 | return $content; |
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| 144 | } |
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| 145 | |||
| 146 | $content = auto_secure_mail_addresses($content); |