1 files changed, 78 insertions, 0 deletions
diff --git a/include/utf8/ord.php b/include/utf8/ord.php
new file mode 100644
index 0000000..a333f96
--- /dev/null
+++ b/include/utf8/ord.php
@@ -0,0 +1,78 @@
+<?php
+
+/**
+* @version $Id: ord.php,v 1.4 2006/09/11 15:22:54 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+/**
+* UTF-8 aware alternative to ord
+* Returns the unicode ordinal for a character
+* @param string UTF-8 encoded character
+* @return int unicode ordinal for the character
+* @see http://www.php.net/ord
+* @see http://www.php.net/manual/en/function.ord.php#46267
+*/
+function utf8_ord($chr)
+{
+	$ord0 = ord($chr);
+
+	if ($ord0 >= 0 && $ord0 <= 127)
+		return $ord0;
+
+	if (!isset($chr{1}))
+	{
+		trigger_error('Short sequence - at least 2 bytes expected, only 1 seen');
+		return false;
+	}
+
+	$ord1 = ord($chr{1});
+	if ($ord0 >= 192 && $ord0 <= 223)
+		return ($ord0 - 192) * 64 + ($ord1 - 128);
+
+	if (!isset($chr{2}))
+	{
+		trigger_error('Short sequence - at least 3 bytes expected, only 2 seen');
+		return false;
+	}
+
+	$ord2 = ord($chr{2});
+	if ($ord0 >= 224 && $ord0 <= 239)
+		return ($ord0-224)*4096 + ($ord1-128)*64 + ($ord2-128);
+
+	if (!isset($chr{3}))
+	{
+		trigger_error('Short sequence - at least 4 bytes expected, only 3 seen');
+		return false;
+	}
+
+	$ord3 = ord($chr{3});
+	if ($ord0>=240 && $ord0<=247)
+		return ($ord0-240)*262144 + ($ord1-128)*4096 + ($ord2-128)*64 + ($ord3-128);
+
+	if (!isset($chr{4}))
+	{
+		trigger_error('Short sequence - at least 5 bytes expected, only 4 seen');
+		return false;
+	}
+
+	$ord4 = ord($chr{4});
+	if ($ord0>=248 && $ord0<=251)
+		return ($ord0-248)*16777216 + ($ord1-128)*262144 + ($ord2-128)*4096 + ($ord3-128)*64 + ($ord4-128);
+
+	if (!isset($chr{5}))
+	{
+		trigger_error('Short sequence - at least 6 bytes expected, only 5 seen');
+		return false;
+	}
+
+	if ($ord0>=252 && $ord0<=253)
+		return ($ord0-252) * 1073741824 + ($ord1-128)*16777216 + ($ord2-128)*262144 + ($ord3-128)*4096  + ($ord4-128)*64 + (ord($c{5})-128);
+
+	if ($ord0 >= 254 && $ord0 <= 255)
+	{
+		trigger_error('Invalid UTF-8 with surrogate ordinal '.$ord0);
+		return false;
+	}
+}