[英]UTF-8 compatible truncate function
Anybody run into this problem for complex Latin characters, such as Vietnamese?对于复杂的拉丁字符,例如越南语,有人遇到过这个问题吗?
function truncate($str, $length, $append = '…') {
$strLength = mb_strlen($str);
if ($strLength <= $length) {
return $str;
}
return mb_substr($str, 0, $length) . $append;
}
echo truncate('Bà Rịa - Vũng Tàu!', 14);
outputs:输出:
Bà Rịa - V�… Bà Rịa - V…
http://codepad.viper-7.com/GOZFB0 http://codepad.viper-7.com/GOZFB0
I need some help to make it cut at the character, but I'm not even sure what is going on behind the scenes here.我需要一些帮助才能切入角色,但我什至不确定这里的幕后发生了什么。
You could use mb_strimwidth (PHP Documentation):您可以使用mb_strimwidth (PHP 文档):
echo mb_strimwidth("Hello World", 0, 10, "...");
Or a custom function like Multibyte String Truncate for Smarty :或自定义 function ,例如Smarty 的多字节字符串截断:
mb_truncate($string, $length = 80, $etc = '...', $charset='UTF-8',
$break_words = false, $middle = false)
{
if ($length == 0)
return '';
if (strlen($string) > $length) {
$length -= min($length, strlen($etc));
if (!$break_words && !$middle) {
$string = preg_replace('/\s+?(\S+)?$/', '', mb_substr($string, 0, $length+1, $charset));
}
if(!$middle) {
return mb_substr($string, 0, $length, $charset) . $etc;
} else {
return mb_substr($string, 0, $length/2, $charset) . $etc . mb_substr($string, -$length/2, $charset);
}
} else {
return $string;
}
}
Be sure to perform necessary Unicode normalization to ensure each character correspond to a single codepoint.请务必执行必要的 Unicode 规范化,以确保每个字符对应于单个代码点。
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