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<?php
/** Encode e-mail header in UTF-8
* @param string
* @return string
*/
function email_header($header) {
// iconv_mime_encode requires PHP 5, imap_8bit requires IMAP extension
return "=?UTF-8?B?" . base64_encode($header) . "?="; //! split long lines
}

/** Send e-mail in UTF-8
* @param string
* @param string
* @param string
* @param string
* @param array
* @return bool
*/
function send_mail($email, $subject, $message, $from = "", $files = array()) {
$eol = (strncasecmp(PHP_OS, "win", 3) ? "\n" : "\r\n"); // PHP_EOL available since PHP 4.3.10 and 5.0.2
$message = str_replace("\n", $eol, wordwrap(str_replace("\r", "", "$message\n")));
$boundary = uniqid("boundary");
$attachments = "";
foreach ((array) $files["error"] as $key => $val) {
if (!$val) {
$attachments .= "--$boundary$eol"
. "Content-Type: " . str_replace("\n", "", $files["type"][$key]) . $eol
. "Content-Disposition: attachment; filename=\"" . preg_replace('~["\\n]~', '', $files["name"][$key]) . "\"$eol"
. "Content-Transfer-Encoding: base64$eol$eol"
. chunk_split(base64_encode(file_get_contents($files["tmp_name"][$key])), 76, $eol) . $eol
;
}
}
$beginning = "";
$headers = "Content-Type: text/plain; charset=utf-8$eol" . "Content-Transfer-Encoding: 8bit";
if ($attachments) {
$attachments .= "--$boundary--$eol";
$beginning = "--$boundary$eol$headers$eol$eol";
$headers = "Content-Type: multipart/mixed; boundary=\"$boundary\"";
}
$headers .= $eol . "MIME-Version: 1.0$eol" . "X-Mailer: Adminer Editor"
. ($from ? $eol . "From: " . str_replace("\n", "", $from) : "") //! should escape display name
;
return mail($email, email_header($subject), $beginning . $message . $attachments, $headers);
}

/** Check whether the column looks like boolean
* @param array single field returned from fields()
* @return bool
*/
function like_bool($field) {
return ereg("bool|(tinyint|bit)\\(1\\)", $field["full_type"]);
}
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