[23] | 1 | <?php |
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| 2 | /** |
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| 3 | * Email.inc.php |
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| 4 | * code by strangecode :: www.strangecode.com :: this document contains copyrighted information |
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| 5 | * |
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| 6 | * Easy email template usage. |
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| 7 | * |
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| 8 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 9 | * @version 1.0 |
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| 10 | ------------------------------------------------------------------------------------- |
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| 11 | // Example. |
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| 12 | $email = new Email(array( |
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| 13 | 'to' => array($frm['email'], 'q@lovemachine.local'), |
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| 14 | 'from' => sprintf('%s <%s>', App::getParam('site_name'), App::getParam('site_email')), |
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[24] | 15 | 'subject' => 'Your account has been activated', |
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[23] | 16 | )); |
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| 17 | $email->setTemplate('email_registration_confirm.ihtml'); |
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| 18 | $email->replace(array( |
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| 19 | 'site_name' => App::getParam('site_name'), |
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| 20 | 'site_url' => App::getParam('site_url'), |
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| 21 | 'username' => $frm['username'], |
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| 22 | 'password' => $frm['password1'], |
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| 23 | )); |
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| 24 | if ($email->send()) { |
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| 25 | App::raiseMsg(sprintf(_("A confirmation email has been sent to %s."), $frm['email']), MSG_SUCCESS, __FILE__, __LINE__); |
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| 26 | } else { |
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[40] | 27 | App::logMsg(sprintf('Error sending confirmation email to address %s', $frm['email']), LOG_NOTICE, __FILE__, __LINE__); |
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[23] | 28 | } |
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| 29 | ------------------------------------------------------------------------------------- |
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| 30 | */ |
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| 31 | class Email { |
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| 32 | |
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[24] | 33 | // Default parameters, to be overwritten by setParam() and read with getParam() |
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[23] | 34 | var $_params = array( |
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| 35 | 'to' => null, |
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| 36 | 'from' => null, |
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| 37 | 'subject' => null, |
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[38] | 38 | 'headers' => null, |
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[23] | 39 | 'regex' => null |
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| 40 | ); |
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[24] | 41 | |
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| 42 | // String that contains the email body. |
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[23] | 43 | var $_template; |
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[24] | 44 | |
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| 45 | // String that contains the email body after replacements. |
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[23] | 46 | var $_template_replaced; |
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| 47 | |
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| 48 | /** |
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| 49 | * Constructor. |
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| 50 | * |
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| 51 | * @access public |
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| 52 | * @param array $params Array of object parameters. |
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| 53 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 54 | * @since 28 Nov 2005 12:59:41 |
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| 55 | */ |
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| 56 | function Email($params=null) |
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| 57 | { |
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[24] | 58 | // The regex used in validEmail(). Set here instead of in the default _params above so we can use the concatination . dot. |
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| 59 | // This matches an email address as complex as: |
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| 60 | // Bob Smith <bob&smith's/dep=sales!@smith-wick.ca.us> (Sales department) |
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| 61 | // ...and something as simple as: |
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| 62 | // x@x.com |
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[23] | 63 | $this->setParam(array('regex' => '/^(?:[^,@]*\s+|[^,@]*(<)|)' // Display name |
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| 64 | . '((?:[^.<>\s@\",\[\]]+[^<>\s@\",\[\]])*[^.<>\s@\",\[\]]+)' // Local-part |
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| 65 | . '@' // @ |
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| 66 | . '((?:(\[)|[A-Z0-9]?)' // Domain, first char |
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| 67 | . '(?(4)' // Domain conditional for if first domain char is [ |
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| 68 | . '(?:[0-9]{1,3}\.){3}[0-9]{1,3}\]' // TRUE, matches IP address |
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| 69 | . '|' |
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| 70 | . '[.-]?(?:[A-Z0-9]+[-.])*(?:[A-Z0-9]+\.)+[A-Z]{2,6}))' // FALSE, matches domain name |
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| 71 | . '(?(1)' // Comment conditional for if initial < exists |
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| 72 | . '(?:>\s*|>\s+\([^,@]+\)\s*)' // TRUE, ensure ending > |
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| 73 | . '|' |
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| 74 | . '(?:|\s*|\s+\([^,@]+\)\s*))$/i')); // FALSE ensure there is no ending > |
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| 75 | |
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[25] | 76 | if (isset($params)) { |
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| 77 | $this->setParam($params); |
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| 78 | } |
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[23] | 79 | } |
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| 80 | |
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| 81 | /** |
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| 82 | * Set (or overwrite existing) parameters by passing an array of new parameters. |
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| 83 | * |
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| 84 | * @access public |
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| 85 | * @param array $params Array of parameters (key => val pairs). |
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| 86 | */ |
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| 87 | function setParam($params) |
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| 88 | { |
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| 89 | if (isset($params) && is_array($params)) { |
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| 90 | // Enforce valid email addresses. |
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| 91 | if (isset($params['to']) && !$this->validEmail($params['to'])) { |
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| 92 | $params['to'] = null; |
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| 93 | } |
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| 94 | if (isset($params['from']) && !$this->validEmail($params['from'])) { |
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| 95 | $params['from'] = null; |
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| 96 | } |
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| 97 | |
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| 98 | // Merge new parameters with old overriding only those passed. |
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| 99 | $this->_params = array_merge($this->_params, $params); |
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| 100 | } else { |
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| 101 | App::logMsg(sprintf('Parameters are not an array: %s', $params), LOG_ERR, __FILE__, __LINE__); |
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| 102 | } |
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| 103 | } |
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| 104 | |
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| 105 | /** |
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| 106 | * Return the value of a parameter, if it exists. |
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| 107 | * |
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| 108 | * @access public |
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| 109 | * @param string $param Which parameter to return. |
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| 110 | * @return mixed Configured parameter value. |
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| 111 | */ |
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| 112 | function getParam($param) |
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| 113 | { |
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| 114 | if (isset($this->_params[$param])) { |
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| 115 | return $this->_params[$param]; |
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| 116 | } else { |
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| 117 | App::logMsg(sprintf('Parameter is not set: %s', $param), LOG_NOTICE, __FILE__, __LINE__); |
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| 118 | return null; |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | /** |
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| 123 | * Loads template from file to generate email body. |
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| 124 | * |
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| 125 | * @access public |
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| 126 | * @param string $template Filename of email template. |
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| 127 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 128 | * @since 28 Nov 2005 12:56:23 |
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| 129 | */ |
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| 130 | function setTemplate($template) |
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| 131 | { |
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| 132 | // Load file, using include_path. |
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| 133 | if (!$this->_template = file_get_contents($template, true)) { |
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| 134 | App::logMsg(sprintf('Email template file does not exist: %s', $template), LOG_ERR, __FILE__, __LINE__); |
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| 135 | $this->_template = null; |
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| 136 | $this->_template_replaced = null; |
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| 137 | return false; |
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| 138 | } |
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[24] | 139 | // This could be a new template, so reset the _template_replaced. |
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[23] | 140 | $this->_template_replaced = null; |
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| 141 | return true; |
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| 142 | } |
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| 143 | |
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| 144 | /** |
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| 145 | * Loads template from string to generate email body. |
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| 146 | * |
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| 147 | * @access public |
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| 148 | * @param string $template Filename of email template. |
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| 149 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 150 | * @since 28 Nov 2005 12:56:23 |
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| 151 | */ |
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| 152 | function setString($string) |
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| 153 | { |
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| 154 | // Load file, using include_path. |
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| 155 | if ('' == $string) { |
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| 156 | App::logMsg(sprintf('Empty string provided.', null), LOG_ERR, __FILE__, __LINE__); |
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| 157 | $this->_template_replaced = null; |
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| 158 | return false; |
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| 159 | } else { |
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| 160 | $_template = $string; |
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[24] | 161 | // This could be a new template, so reset the _template_replaced. |
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[23] | 162 | $this->_template_replaced = null; |
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| 163 | return true; |
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| 164 | } |
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| 165 | } |
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| 166 | |
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| 167 | /** |
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| 168 | * Replace variables in template with argument data. |
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| 169 | * |
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| 170 | * @access public |
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| 171 | * @param array $replacements Array keys are the values to search for, array vales are the replacement values. |
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| 172 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 173 | * @since 28 Nov 2005 13:08:51 |
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| 174 | */ |
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| 175 | function replace($replacements) |
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| 176 | { |
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[24] | 177 | // Ensure template exists. |
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[23] | 178 | if (!isset($this->_template)) { |
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| 179 | App::logMsg(sprintf('Cannot replace variables, no template defined.', null), LOG_ERR, __FILE__, __LINE__); |
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| 180 | return false; |
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| 181 | } |
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[24] | 182 | |
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| 183 | // Ensure replacements argument is an array. |
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[23] | 184 | if (!is_array($replacements)) { |
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| 185 | App::logMsg(sprintf('Cannot replace variables, invalid replacements.', null), LOG_ERR, __FILE__, __LINE__); |
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| 186 | return false; |
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| 187 | } |
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| 188 | |
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| 189 | // Apply regex pattern to search elements. |
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| 190 | $search = array_keys($replacements); |
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| 191 | array_walk($search, create_function('&$v', '$v = "/{" . preg_quote($v) . "}/i";')); |
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| 192 | |
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[35] | 193 | // Replacement values. |
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[23] | 194 | $replace = array_values($replacements); |
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[24] | 195 | |
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| 196 | // Search and replace all values at once. |
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[23] | 197 | $this->_template_replaced = preg_replace($search, $replace, $this->_template); |
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| 198 | } |
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| 199 | |
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| 200 | /** |
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| 201 | * Send email using PHP's mail() function. |
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| 202 | * |
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| 203 | * @access public |
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| 204 | * @param string $to |
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| 205 | * @param string $from |
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| 206 | * @param string $subject |
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| 207 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 208 | * @since 28 Nov 2005 12:56:09 |
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| 209 | */ |
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[38] | 210 | function send($to=null, $from=null, $subject=null, $headers=null) |
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[23] | 211 | { |
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[24] | 212 | // Use arguments if provided. |
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[23] | 213 | if (isset($to)) { |
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| 214 | $this->setParam(array('to' => $to)); |
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| 215 | } |
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| 216 | if (isset($from)) { |
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| 217 | $this->setParam(array('from' => $from)); |
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| 218 | } |
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| 219 | if (isset($subject)) { |
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| 220 | $this->setParam(array('subject' => $subject)); |
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| 221 | } |
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[38] | 222 | if (isset($headers)) { |
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| 223 | $this->setParam(array('headers' => $headers)); |
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| 224 | } |
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[36] | 225 | |
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[24] | 226 | // Ensure required values exist. |
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[23] | 227 | if (!isset($this->_template)) { |
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| 228 | App::logMsg(sprintf('Cannot send email. Template not set.', null), LOG_ERR, __FILE__, __LINE__); |
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| 229 | return false; |
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| 230 | } else if (!isset($this->_params['to'])) { |
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| 231 | App::logMsg(sprintf('Cannot send email. TO not defined.', null), LOG_ERR, __FILE__, __LINE__); |
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| 232 | return false; |
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| 233 | } else if (!isset($this->_params['from'])) { |
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| 234 | App::logMsg(sprintf('Cannot send email. FROM not defined.', null), LOG_ERR, __FILE__, __LINE__); |
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| 235 | return false; |
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| 236 | } else if (!isset($this->_params['subject'])) { |
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| 237 | App::logMsg(sprintf('Cannot send email. SUBJECT not defined.', null), LOG_ERR, __FILE__, __LINE__); |
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| 238 | return false; |
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| 239 | } |
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| 240 | |
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[24] | 241 | // Wrap email text body, using _template_replaced if replacements have been used, or just a fresh _template if not. |
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[23] | 242 | $final_body = wordwrap(isset($this->_template_replaced) ? $this->_template_replaced : $this->_template); |
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[24] | 243 | |
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| 244 | // Ensure all placeholders have been replaced. Find anything with {...} characters. |
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[23] | 245 | if (preg_match('/({[^}]+})/', $final_body, $unreplaced_match)) { |
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| 246 | App::logMsg(sprintf('Cannot send email. Variables left unreplaced in template: %s', (isset($unreplaced_match) ? $unreplaced_match[1] : '')), LOG_ERR, __FILE__, __LINE__); |
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| 247 | return false; |
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| 248 | } |
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| 249 | |
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[24] | 250 | // Final "to" header can have multiple addresses if in an array. |
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[23] | 251 | $final_to = is_array($this->_params['to']) ? join(', ', $this->_params['to']) : $this->_params['to']; |
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[24] | 252 | |
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| 253 | // From headers are custom headers. |
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[38] | 254 | $headers = array('From' => $this->_params['from']); |
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| 255 | |
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| 256 | // Additional headers. |
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| 257 | if (isset($this->_params['headers']) && is_array($this->_params['headers'])) { |
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| 258 | $headers = array_merge($this->_params['headers'], $headers); |
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| 259 | } |
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[24] | 260 | |
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[38] | 261 | // Process headers. |
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| 262 | $final_headers = array(); |
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| 263 | foreach ($headers as $key => $val) { |
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| 264 | $final_headers[] = sprintf('%s: %s', $key, $val); |
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| 265 | } |
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| 266 | $final_headers = join("\r\n", $final_headers); |
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| 267 | |
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[24] | 268 | // This is the address where delivery problems are sent to. We must strip off everything except the local@domain part. |
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[23] | 269 | $envelope_sender_header = sprintf('-f %s', preg_replace('/^.*<?([^\s@\[\]<>()]+\@[A-Za-z0-9.-]{1,}\.[A-Za-z]{2,5})>?$/iU', '$1', $this->_params['from'])); |
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[36] | 270 | |
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| 271 | // Check for mail header injection attacks. |
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[38] | 272 | $full_mail_content = join("\n", array($final_to, $this->_params['subject'], $final_body, $final_headers, $envelope_sender_header)); |
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[36] | 273 | if (preg_match("/(Content-Type:|MIME-Version:|Content-Transfer-Encoding:|[\n\r]Bcc:|[\n\r]Cc:)/i", $full_mail_content)) { |
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[37] | 274 | App::logMsg(sprintf('Mail header injection attack in content: %s', $full_mail_content), LOG_WARNING, __FILE__, __LINE__); |
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[36] | 275 | sleep(3); |
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| 276 | return false; |
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| 277 | } |
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[24] | 278 | |
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| 279 | // Ensure message was successfully accepted for delivery. |
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[38] | 280 | if (!mail($final_to, $this->_params['subject'], $final_body, $final_headers, $envelope_sender_header)) { |
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| 281 | App::logMsg(sprintf('Email failure with parameters: %s, %s, %s, %s', $this->_params['to'], $this->_params['subject'], str_replace("\r\n", '', $final_headers), $envelope_sender_header), LOG_NOTICE, __FILE__, __LINE__); |
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[23] | 282 | return false; |
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| 283 | } |
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| 284 | |
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| 285 | return true; |
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| 286 | } |
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| 287 | |
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| 288 | /** |
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| 289 | * Validates an email address based on the recommendations in RFC 3696. |
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| 290 | * Is more loose than restrictive, to allow the many valid variants of |
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| 291 | * email addresses while catching the most common mistakes. Checks an array too. |
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| 292 | * http://www.faqs.org/rfcs/rfc822.html |
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| 293 | * http://www.faqs.org/rfcs/rfc2822.html |
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| 294 | * http://www.faqs.org/rfcs/rfc3696.html |
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| 295 | * http://www.faqs.org/rfcs/rfc1035.html |
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| 296 | * |
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| 297 | * @access public |
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| 298 | * @param mixed $email Address to check, string or array. |
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| 299 | * @return bool Validity of address. |
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| 300 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 301 | * @since 30 Nov 2005 22:00:50 |
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| 302 | */ |
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| 303 | function validEmail($email) |
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| 304 | { |
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[24] | 305 | // If an array, check values recursively. |
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[23] | 306 | if (is_array($email)) { |
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| 307 | foreach ($email as $e) { |
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| 308 | if (!$this->validEmail($e)) { |
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| 309 | return false; |
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| 310 | } |
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| 311 | } |
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| 312 | return true; |
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| 313 | } else { |
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[24] | 314 | // To be valid email address must match regex and fit within the lenth constraints. |
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| 315 | if (preg_match($this->getParam('regex'), $email, $e_parts) && strlen($e_parts[2]) < 64 && strlen($e_parts[3]) < 255) { |
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| 316 | return true; |
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| 317 | } else { |
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[40] | 318 | App::logMsg(sprintf('Invalid email: %s', $email), LOG_INFO, __FILE__, __LINE__); |
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[23] | 319 | return false; |
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| 320 | } |
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| 321 | } |
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| 322 | } |
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| 323 | } |
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| 324 | |
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| 325 | ?> |
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