Add a backport (compat) for quoted_printable_encode()
diff --git a/system/core/compat/standard.php b/system/core/compat/standard.php
index 6380fa1..afe9e98 100644
--- a/system/core/compat/standard.php
+++ b/system/core/compat/standard.php
@@ -289,5 +289,93 @@
}
}
-/* End of file array.php */
-/* Location: ./system/core/compat/array.php */
\ No newline at end of file
+// ------------------------------------------------------------------------
+
+if ( ! function_exists('quoted_printable_encode'))
+{
+ /**
+ * quoted_printable_encode()
+ *
+ * @link http://php.net/quoted_printable_encode
+ * @param string $str
+ * @return string
+ */
+ function quoted_printable_encode($str)
+ {
+ if (strlen($str) === 0)
+ {
+ return '';
+ }
+ elseif (in_array($type = gettype($str), array('array', 'object'), TRUE))
+ {
+ if ($type === 'object' && method_exists($str, '__toString'))
+ {
+ $str = (string) $str;
+ }
+ else
+ {
+ trigger_error('quoted_printable_encode() expects parameter 1 to be string, '.$type.' given', E_USER_WARNING);
+ return NULL;
+ }
+ }
+
+ if (function_exists('imap_8bit'))
+ {
+ return imap_8bit($str);
+ }
+
+ $i = $lp = 0;
+ $output = '';
+ $hex = '0123456789ABCDEF';
+ $length = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'))
+ ? mb_strlen($str, '8bit')
+ : strlen($str);
+
+ while ($length--)
+ {
+ if ((($c = $str[$i++]) === "\015") && isset($str[$i]) && ($str[$i] === "\012") && $length > 0)
+ {
+ $output .= "\015".$str[$i++];
+ $length--;
+ $lp = 0;
+ continue;
+ }
+
+ if (
+ ctype_cntrl($c)
+ OR (ord($c) === 0x7f)
+ OR (ord($c) & 0x80)
+ OR ($c === '=')
+ OR ($c === ' ' && isset($str[$i]) && $str[$i] === "\015")
+ )
+ {
+ if (
+ (($lp += 3) > 75 && ord($c) <= 0x7f)
+ OR (ord($c) > 0x7f && ord($c) <= 0xdf && ($lp + 3) > 75)
+ OR (ord($c) > 0xdf && ord($c) <= 0xef && ($lp + 6) > 75)
+ OR (ord($c) > 0xef && ord($c) <= 0xf4 && ($lp + 9) > 75)
+ )
+ {
+ $output .= "=\015\012";
+ $lp = 3;
+ }
+
+ $output .= '='.$hex[ord($c) >> 4].$hex[ord($c) & 0xf];
+ continue;
+ }
+
+ if ((++$lp) > 75)
+ {
+ $output .= "=\015\012";
+ $lp = 1;
+ }
+
+ $output .= $c;
+ }
+
+ return $output;
+ }
+}
+
+/* End of file standard.php */
+/* Location: ./system/core/compat/standard.php */
\ No newline at end of file