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	<?php
2	function str_length(string $str) : string
3	{
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	function split_line(string $str, string $prefix = "", int $width = 76, int $lines_limit = PHP_INT_MAX, string $end_of_line = "\n") : string
36	{
37	if ($width <= 0)
38	{
39	return $str;
40	}
41
42	$result = "";
43	$len = strlen($str);
44	$prefix_len = str_length($prefix);
45
46	$lines_count = 0;
47
48	$line = $prefix;
49	$line_len = $prefix_len;
50	for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
51	{
52	$c = $str[$i];
53
54	// Skip special characters
55	if ($c == "\r" \|\| $c == "\7")
56	{
57	continue;
58	}
59
60	if ($c == "\n")
61	{
62	if ($lines_count + 1 >= $lines_limit)
63	{
64	break;
65	}
66
67	$result .= ($line . $end_of_line);
68	$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 > $width)
89	{
90	if ($lines_count + 1 >= $lines_limit)
91	{
92	break;
93	}
94
95	$result .= ($line . $end_of_line);
96	$lines_count++;
97	$line = $prefix;
98	$line_len = $prefix_len;
99	}
100	$line_len += 2;
101	}
102	else
103	{
104	$line_len++;
105	}
106
107	if ($line_len > $width)
108	{
109	if ($lines_count + 1 >= $lines_limit)
110	{
111	break;
112	}
113
114	$result .= ($line . $end_of_line);
115	$lines_count++;
116	$line = $prefix;
117	$line_len = $prefix_len + 1;
118	}
119
120	$line .= $c;
121	}
122
123	if ($lines_count < $lines_limit)
124	{
125	$result .= $line;
126	}
127
128	return $result;
129	}
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