我需要将字符串切割成大约160个字符,但我想通过最近的空格字符进行剪切。使用UTF-8字体(mb_
函数)会使任务变得更糟。我的代码如下:
<?php
function mb_strrev($str, $encoding='UTF-8'){
return mb_convert_encoding( strrev( mb_convert_encoding($str, 'UTF-16BE', $encoding) ),
$encoding, 'UTF-16LE');
}
$in = mb_strpos(mb_strrev(trim(mb_substr($mysring, 0, 165))), ' ');
$new = mb_substr(mb_strrev(trim(mb_substr($mysring, 0, 165))), $in, 165);
mb_strrev($new);
?>
有谁知道更优雅的方式?
答案 0 :(得分:2)
找到this,也许对你来说更加优雅。
答案 1 :(得分:1)
我做这样的事情:
<?php
function approx_len($str,$len) {
$x = explode(" ",$str);
$y = count($x);
$newlen = '';
for ($i = 0; $i < $y; $i++) {
$this_x = $x[$i]. ' ';
if (strlen($newlen.$this_x) > $len) $i = $y;
else $newlen = $newlen.$this_x;
}
return $newlen;
}
$x = approx_len("aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa aaaaa",160);
echo $x;
echo '<br />';
echo strlen($x);
//returns 156
?>