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1 <?php |
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2 |
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3 /** |
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4 * Sends e-mail via SMTP. |
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5 * @param string Source address |
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6 * @param string Destination address |
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7 * @param string Subject |
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8 * @param string Message body |
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9 * @param string Additional headers |
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10 * @return bool |
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11 */ |
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12 |
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13 function smtp_mail($from, $to, $subject, $body, $headers = '') |
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14 { |
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15 list($domain) = array_reverse(explode('@', $to)); |
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16 |
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17 // look up MX record for $domain |
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18 $record = dns_get_record($domain, DNS_MX); |
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19 |
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20 if ( !isset($record[0]['target']) ) |
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21 // failed to get target server |
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22 return false; |
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23 |
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24 // open socket |
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25 $sock = fsockopen($record[0]['target'], 25, $errno, $errstr, 5); |
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26 if ( !$sock ) |
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27 // failed to open socket |
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28 return false; |
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29 |
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30 try |
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31 { |
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32 // wait for 220 |
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33 if ( _smtp_get_response($sock) !== 220 ) |
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34 throw new Exception("Expected 220"); |
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35 |
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36 // HELO |
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37 // get server's FQDN |
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38 $hostname = gethostname(); |
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39 if ( strpos($hostname, '.') === false ) |
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40 { |
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41 $hostname .= '.' . trim(`dnsdomainname`); |
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42 } |
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43 fputs($sock, "HELO $hostname\r\n"); |
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44 if ( _smtp_get_response($sock) !== 250 ) |
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45 throw new Exception("Expected 250"); |
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46 |
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47 // from |
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48 fputs($sock, "MAIL FROM: <$from>\r\n"); |
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49 if ( _smtp_get_response($sock) !== 250 ) |
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50 throw new Exception("Expected 250"); |
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51 |
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52 // to |
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53 fputs($sock, "RCPT TO: <$to>\r\n"); |
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54 if ( _smtp_get_response($sock) !== 250 ) |
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55 throw new Exception("Expected 250"); |
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56 |
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57 // data |
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58 fputs($sock, "DATA\r\n"); |
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59 if ( !in_array(_smtp_get_response($sock), array(354, 250)) ) |
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60 throw new Exception("Expected 250 or 354"); |
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61 |
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62 // send headers |
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63 $full_headers = "Subject: $subject\r\n"; |
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64 $full_headers .= "From: <$from>\r\n"; |
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65 if ( !strstr($headers, "To: ") ) |
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66 $full_headers .= "To: <$to>\r\n"; |
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67 if ( !empty($headers) ) |
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68 $full_headers .= trim(str_replace("\n", "\r\n", str_replace("\r\n", "\n", $headers))) . "\r\n"; |
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69 |
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70 $full_headers .= "\r\n"; |
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71 fputs($sock, $full_headers); |
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72 |
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73 // send body |
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74 $body = str_replace("\n", "\r\n", str_replace("\r\n", "\n", $body)); |
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75 fputs($sock, $body); |
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76 |
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77 // send end marker |
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78 fputs($sock, "\r\n.\r\n"); |
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79 if ( _smtp_get_response($sock) !== 250 ) |
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80 throw new Exception("Expected 250"); |
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81 |
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82 // end session |
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83 fputs($sock, "QUIT\r\n"); |
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84 if ( _smtp_get_response($sock) !== 221 ) |
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85 throw new Exception("Expected 221"); |
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86 |
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87 fclose($sock); |
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88 } catch ( Exception $e ) |
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89 { |
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90 fputs($sock, "QUIT\r\n"); |
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91 _smtp_get_response($sock); |
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92 fclose($sock); |
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93 return false; |
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94 } |
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95 return true; |
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96 } |
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97 |
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98 function _smtp_get_response($sock) |
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99 { |
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100 while ( !feof($sock) && ($line = fgets($sock, 8192)) ) |
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101 { |
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102 if ( preg_match('/^([0-9]+)(\s.+)?$/', $line, $match) ) |
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103 { |
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104 return intval($match[1]); |
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105 } |
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106 } |
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107 return false; |
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108 } |
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109 |
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110 // smtp_mail('plates@csh.rit.edu', 'plates@csh.rit.edu', 'Test e-mail', 'Testing', 'From: Plates <plates@csh.rit.edu>'); |
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111 |