--- fenglin/lib/str_process.inc.php	2025/03/18 07:10:59	1.10
+++ fenglin/lib/str_process.inc.php	2025/03/26 07:09:08	1.12
@@ -1,4 +1,37 @@
 <?
+function str_length($str)
+{
+	$len = strlen($str);
+	$ret = 0;
+
+	for ($i = 0; $i < $len; $i++)
+	{
+		$c = $str[$i];
+
+		// Process UTF-8 Chinese characters
+		$v1 = ord($c);
+		if (($v1 & 0b10000000) == 0b10000000) //head of multi-byte character
+		{
+			$v2 = ($v1 & 0b01111000) << 1;
+			while ($v2 & 0b10000000)
+			{
+				$i++;
+				$v3 = $str[$i];
+				$c .= $v3;
+				$v2 = ($v2 & 0b01111111 ) << 1;
+			}
+
+			$ret += 2;
+		}
+		else
+		{
+			$ret++;
+		}
+	}
+
+	return $ret;
+}
+
 function split_line($str, $prefix = "", $width = 76, $lines_limit = PHP_INT_MAX)
 {
 	if ($width <= 0)
@@ -6,13 +39,13 @@ function split_line($str, $prefix = "",
 	
 	$result = "";
 	$len = strlen($str);
-	$prefix_len = mb_strlen($prefix, 'UTF-8');
+	$prefix_len = str_length($prefix);
 
 	$lines_count = 0;
 
 	$line = $prefix;
 	$line_len = $prefix_len;
-	for($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
+	for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
 	{
 		$c = $str[$i];
 
@@ -47,6 +80,11 @@ function split_line($str, $prefix = "",
 			// Each UTF-8 CJK character should use two character length for display
 			if ($line_len + 2 > $width)
 			{
+				if ($lines_count + 1 >= $lines_limit)
+				{
+					break;
+				}
+
 				$result .= ($line . "\n");
 				$lines_count++;
 				$line = $prefix;
@@ -63,13 +101,22 @@ function split_line($str, $prefix = "",
 
 		if ($line_len >= $width)
 		{
+			if ($lines_count + 1 >= $lines_limit)
+			{
+				break;
+			}
+
 			$result .= ($line . "\n");
 			$lines_count++;
 			$line = $prefix;
 			$line_len = $prefix_len;
 		}
 	}
-	$result .= ($line . "\n");
+
+	if ($lines_count < $lines_limit)
+	{
+		$result .= $line;
+	}
 
 	return $result;
 }