utils/lib/str_process.inc.php

<?php
function str_length(string $str) : int
{
        $len = strlen($str);
        $ret = 0;

        for ($i = 0; $i < $len; $i++)
        {
                $c = $str[$i];

                // Process UTF-8 Chinese characters
                $v1 = ord($c);
                if ($v1 & 0b10000000) //head of multi-byte character
                {
                        $v2 = ($v1 & 0b01110000) << 1;
                        while ($v2 & 0b10000000)
                        {
                                $i++;
                                $c .= $str[$i];
                                $v2 = ($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) //head of multi-byte character
                {
                        $v2 = ($v1 & 0b01110000) << 1;
                        while ($v2 & 0b10000000)
                        {
                                $i++;
                                $c .= $str[$i];
                                $v2 = ($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) : int
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) //head of multi-byte character
14	{
15	$v2 = ($v1 & 0b01110000) << 1;
16	while ($v2 & 0b10000000)
17	{
18	$i++;
19	$c .= $str[$i];
20	$v2 = ($v2 & 0b01111111) << 1;
21	}
22
23	$ret += 2;
24	}
25	else
26	{
27	$ret++;
28	}
29	}
30
31	return $ret;
32	}
33
34	function split_line(string $str, string $prefix = "", int $width = 76, int $lines_limit = PHP_INT_MAX, string $end_of_line = "\n") : string
35	{
36	if ($width <= 0)
37	{
38	return $str;
39	}
40
41	$result = "";
42	$len = strlen($str);
43	$prefix_len = str_length($prefix);
44
45	$lines_count = 0;
46
47	$line = $prefix;
48	$line_len = $prefix_len;
49	for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
50	{
51	$c = $str[$i];
52
53	// Skip special characters
54	if ($c == "\r" \|\| $c == "\7")
55	{
56	continue;
57	}
58
59	if ($c == "\n")
60	{
61	if ($lines_count + 1 >= $lines_limit)
62	{
63	break;
64	}
65
66	$result .= ($line . $end_of_line);
67	$lines_count++;
68	$line = $prefix;
69	$line_len = $prefix_len;
70	continue;
71	}
72
73	// Process UTF-8 Chinese characters
74	$v1 = ord($c);
75	if ($v1 & 0b10000000) //head of multi-byte character
76	{
77	$v2 = ($v1 & 0b01110000) << 1;
78	while ($v2 & 0b10000000)
79	{
80	$i++;
81	$c .= $str[$i];
82	$v2 = ($v2 & 0b01111111) << 1;
83	}
84
85	// Each UTF-8 CJK character should use two character length for display
86	if ($line_len + 2 > $width)
87	{
88	if ($lines_count + 1 >= $lines_limit)
89	{
90	break;
91	}
92
93	$result .= ($line . $end_of_line);
94	$lines_count++;
95	$line = $prefix;
96	$line_len = $prefix_len;
97	}
98	$line_len += 2;
99	}
100	else
101	{
102	$line_len++;
103	}
104
105	if ($line_len > $width)
106	{
107	if ($lines_count + 1 >= $lines_limit)
108	{
109	break;
110	}
111
112	$result .= ($line . $end_of_line);
113	$lines_count++;
114	$line = $prefix;
115	$line_len = $prefix_len + 1;
116	}
117
118	$line .= $c;
119	}
120
121	if ($lines_count < $lines_limit)
122	{
123	$result .= $line;
124	}
125
126	return $result;
127	}
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