fenglin/lib/str_process.inc.php

<?
function split_line($str, $prefix = "", $width = 76, $lines_limit = PHP_INT_MAX)
{
        if ($width <= 0)
                return $str;
        
        $result = "";
        $len = strlen($str);
        $prefix_len = mb_strlen($prefix, 'UTF-8');

        $lines_count = 0;

        $line = $prefix;
        $line_len = $prefix_len;
        for($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
        {
                $c = $str[$i];

                // Skip special characters
                if ($c == "\r" || $c == "\7")
                {
                        continue;
                }
                                
                if ($c == "\n")
                {
                        $result .= ($line . "\n");
                        $lines_count++;
                        $line = $prefix;
                        $line_len = $prefix_len;
                        continue;
                }

                // 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;
                        }

                        // Each UTF-8 CJK character should use two character length for display
                        if ($line_len + 2 > $width)
                        {
                                $result .= ($line . "\n");
                                $lines_count++;
                                $line = $prefix;
                                $line_len = $prefix_len;
                        }
                        $line_len += 2;
                }
                else
                {
                        $line_len++;
                }

                $line .= $c;

                if ($line_len >= $width)
                {
                        $result .= ($line . "\n");
                        $lines_count++;
                        $line = $prefix;
                        $line_len = $prefix_len;
                }
        }
        $result .= ($line . "\n");

        return $result;
}
?>
1	sysadm	1.1	<?
2	sysadm	1.10	function split_line($str, $prefix = "", $width = 76, $lines_limit = PHP_INT_MAX)
3	sysadm	1.1	{
4	sysadm	1.10	if ($width <= 0)
5	sysadm	1.1	return $str;
6
7	sysadm	1.9	$result = "";
8	sysadm	1.10	$len = strlen($str);
9			$prefix_len = mb_strlen($prefix, 'UTF-8');
10
11			$lines_count = 0;
12	sysadm	1.9
13	sysadm	1.4	$line = $prefix;
14	sysadm	1.9	$line_len = $prefix_len;
15	sysadm	1.10	for($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
16	sysadm	1.1	{
17	sysadm	1.10	$c = $str[$i];
18	sysadm	1.9
19	sysadm	1.10	// Skip special characters
20			if ($c == "\r" \|\| $c == "\7")
21			{
22			continue;
23			}
24
25			if ($c == "\n")
26			{
27			$result .= ($line . "\n");
28			$lines_count++;
29			$line = $prefix;
30			$line_len = $prefix_len;
31			continue;
32			}
33
34			// Process UTF-8 Chinese characters
35			$v1 = ord($c);
36			if (($v1 & 0b10000000) == 0b10000000) //head of multi-byte character
37			{
38			$v2 = ($v1 & 0b01111000) << 1;
39			while ($v2 & 0b10000000)
40			{
41			$i++;
42			$v3 = $str[$i];
43			$c .= $v3;
44			$v2 = ($v2 & 0b01111111 ) << 1;
45			}
46
47			// Each UTF-8 CJK character should use two character length for display
48			if ($line_len + 2 > $width)
49			{
50			$result .= ($line . "\n");
51			$lines_count++;
52			$line = $prefix;
53			$line_len = $prefix_len;
54			}
55			$line_len += 2;
56			}
57			else
58			{
59			$line_len++;
60			}
61
62			$line .= $c;
63	sysadm	1.9
64			if ($line_len >= $width)
65	sysadm	1.3	{
66	sysadm	1.9	$result .= ($line . "\n");
67	sysadm	1.10	$lines_count++;
68	sysadm	1.4	$line = $prefix;
69	sysadm	1.9	$line_len = $prefix_len;
70	sysadm	1.3	}
71	sysadm	1.1	}
72	sysadm	1.9	$result .= ($line . "\n");
73	sysadm	1.1
74			return $result;
75			}
76			?>
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