fenglin/lib/str_process.inc.php

<?php
function str_length(string $str) : string
{
        $len = strlen($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(string $str, string $prefix = "", int $width = 76, int $lines_limit = PHP_INT_MAX, string $end_of_line = "\n") : string
{
        if ($width <= 0)
        {
                return $str;
        }

        $result = "";
        $len = strlen($str);
        $prefix_len = str_length($prefix);

        $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 ($c == "\n")
                {
                        if ($lines_count + 1 >= $lines_limit)
                        {
                                break;
                        }

                        $result .= ($line . $end_of_line);
                        $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 > $width)
                        {
                                if ($lines_count + 1 >= $lines_limit)
                                {
                                        break;
                                }

                                $result .= ($line . $end_of_line);
                                $lines_count++;
                                $line = $prefix;
                                $line_len = $prefix_len;
                        }
                        $line_len += 2;
                }
                else
                {
                        $line_len++;
                }

                if ($line_len > $width)
                {
                        if ($lines_count + 1 >= $lines_limit)
                        {
                                break;
                        }

                        $result .= ($line . $end_of_line);
                        $lines_count++;
                        $line = $prefix;
                        $line_len = $prefix_len + 1;
                }

                $line .= $c;
        }

        if ($lines_count < $lines_limit)
        {
                $result .= $line;
        }

        return $result;
}
?>
1	sysadm	1.16	<?php
2	sysadm	1.14	function str_length(string $str) : string
3	sysadm	1.12	{
4			$len = strlen($str);
5			$ret = 0;
6
7			for ($i = 0; $i < $len; $i++)
8			{
9			$c = $str[$i];
10
11			// Process UTF-8 Chinese characters
12			$v1 = ord($c);
13			if (($v1 & 0b10000000) == 0b10000000) //head of multi-byte character
14			{
15			$v2 = ($v1 & 0b01111000) << 1;
16			while ($v2 & 0b10000000)
17			{
18			$i++;
19			$v3 = $str[$i];
20			$c .= $v3;
21			$v2 = ($v2 & 0b01111111 ) << 1;
22			}
23
24			$ret += 2;
25			}
26			else
27			{
28			$ret++;
29			}
30			}
31
32			return $ret;
33			}
34
35	sysadm	1.14	function split_line(string $str, string $prefix = "", int $width = 76, int $lines_limit = PHP_INT_MAX, string $end_of_line = "\n") : string
36	sysadm	1.1	{
37	sysadm	1.10	if ($width <= 0)
38	sysadm	1.14	{
39	sysadm	1.1	return $str;
40	sysadm	1.14	}
41	sysadm	1.17
42	sysadm	1.9	$result = "";
43	sysadm	1.10	$len = strlen($str);
44	sysadm	1.12	$prefix_len = str_length($prefix);
45	sysadm	1.10
46			$lines_count = 0;
47	sysadm	1.9
48	sysadm	1.4	$line = $prefix;
49	sysadm	1.9	$line_len = $prefix_len;
50	sysadm	1.11	for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
51	sysadm	1.1	{
52	sysadm	1.10	$c = $str[$i];
53	sysadm	1.9
54	sysadm	1.10	// Skip special characters
55			if ($c == "\r" \|\| $c == "\7")
56			{
57			continue;
58			}
59	sysadm	1.17
60	sysadm	1.10	if ($c == "\n")
61			{
62	sysadm	1.13	if ($lines_count + 1 >= $lines_limit)
63			{
64			break;
65			}
66
67			$result .= ($line . $end_of_line);
68	sysadm	1.10	$lines_count++;
69			$line = $prefix;
70			$line_len = $prefix_len;
71			continue;
72			}
73
74			// Process UTF-8 Chinese characters
75			$v1 = ord($c);
76			if (($v1 & 0b10000000) == 0b10000000) //head of multi-byte character
77			{
78			$v2 = ($v1 & 0b01111000) << 1;
79			while ($v2 & 0b10000000)
80			{
81			$i++;
82			$v3 = $str[$i];
83			$c .= $v3;
84			$v2 = ($v2 & 0b01111111 ) << 1;
85			}
86
87			// Each UTF-8 CJK character should use two character length for display
88			if ($line_len + 2 > $width)
89			{
90	sysadm	1.12	if ($lines_count + 1 >= $lines_limit)
91			{
92			break;
93			}
94
95	sysadm	1.13	$result .= ($line . $end_of_line);
96	sysadm	1.10	$lines_count++;
97			$line = $prefix;
98			$line_len = $prefix_len;
99			}
100			$line_len += 2;
101			}
102			else
103			{
104			$line_len++;
105			}
106
107	sysadm	1.15	if ($line_len > $width)
108	sysadm	1.3	{
109	sysadm	1.12	if ($lines_count + 1 >= $lines_limit)
110			{
111			break;
112			}
113
114	sysadm	1.13	$result .= ($line . $end_of_line);
115	sysadm	1.10	$lines_count++;
116	sysadm	1.4	$line = $prefix;
117	sysadm	1.15	$line_len = $prefix_len + 1;
118	sysadm	1.3	}
119	sysadm	1.15
120			$line .= $c;
121	sysadm	1.1	}
122	sysadm	1.11
123			if ($lines_count < $lines_limit)
124			{
125			$result .= $line;
126			}
127	sysadm	1.1
128			return $result;
129			}
130			?>
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