note 58972 deleted from function.imagettfbbox by cmb
| From: | cmb@php.net | Date: | Sun, 07 Jul 2019 08:10:46 +0000 |
| Subject: | note 58972 deleted from function.imagettfbbox by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-211515@lists.php.net to get a copy of this message | ||
Note Submitter: Mickey9801 at ComicParty dot com
----
Most of functions shared here seems only work with western language and is not suitable for
multibyte characters (like Chinese). I have written a function using mb_string functions to match
the need of multibyte character word wrapping.
I also added some machanism so that English word won't be cut off at the end of line. Of couse
you must use unicode string on GD.
function mb_wordwrap($txt,$font,$size,$width) {
$pointer = 0;
$this_line_start = 0;
$this_line_strlen = 1;
$single_byte_stack = "";
$result_lines = array();
while ($pointer <= mb_strlen($txt)) {
$this_char = mb_substr($txt,$pointer,1);
$tmp_line = mb_substr($txt, $this_line_start, $this_line_strlen);
$tmp_line_bbox = imagettfbbox($size,0,$font,$tmp_line);
$this_line_width = $tmp_line_bbox[2]-$tmp_line_bbox[0];
if ($this_line_width > $width) {
// If last word is alphanumeric, put it to next line rather then cut it off
if ($single_byte_stack != "") {
$stack_len = mb_strlen($single_byte_stack);
$this_line_strlen -= $stack_len;
$pointer -= $stack_len;
}
$result_lines[] = mb_substr($txt, $this_line_start, $this_line_strlen-1);
$this_line_start = $pointer;
$this_line_strlen = 1;
$single_byte_stack = "";
} else {
// Prevent to cut off english word at the end of line
// if this character is a alphanumeric character or open bracket, put it into stack
if (
(ord($this_char)>=48 && ord($this_char)<=57) ||
(ord($this_char)>=65 && ord($this_char)<=91) ||
(ord($this_char)>=97 && ord($this_char)<=123) ||
ord($this_char)==40 ||
ord($this_char)==60 ||
($single_byte_stack=="" && (ord($this_char)==34 || ord($this_char)==39))
) $single_byte_stack .= $this_char;
else $single_byte_stack = ""; // Clear stack if met multibyte character and not line
end
$this_line_strlen++;
$pointer++;
}
}
// Move remained word to result
$result_lines[] = mb_substr($txt, $this_line_start);
return $result_lines;
}