PHP截取中文字符串，UTF-8、GBK
function substring($str, $start, $len) {
$tmpstr = "";
$strlen = $start + $len;
for($i = 0; $i < $strlen; $i++) {
if(ord(substr($str, $i, 1)) > 0xa0) {
$tmpstr .= substr($str, $i, 2);
$i++;
} else
$tmpstr .= substr($str, $i, 1);
}
return $tmpstr;
}
====================================
<?php
function c_substr($string, $from, $length = null){
preg_match_all('/[\x80-\xff]?./', $string, $match);
if(is_null($length)){
$result = implode('', array_slice($match[0], $from));
}else{
$result = implode('', array_slice($match[0], $from, $length));
}
return $result;
}
$str = "zhon华人min共和guo";
$from = 3;
$length = 7;
echo(c_substr($str, $from, $length));
// 输出: n华人min共
//还有utf-8的
/*
Regarding windix's function to handle UTF-8 strings:
one can use the "u" modifier on the regular expression so that the pattern string is treated as UTF-8
(available from PHP 4.1.0 or greater on Unix and from PHP 4.2.3 on win32).
This way the function works for other encodings too (like Greek for example).
The modified function would read like this:
*/
function utf8_substr($str,$start) {
$null = "";
preg_match_all("/./u", $str, $ar);
if(func_num_args() >= 3) {
$end = func_get_arg(2);
return join($null, array_slice($ar[0],$start,$end));
} else {
return join($null, array_slice($ar[0],$start));
}
}
?>
===========================================
<?php
/**
***@Author:LAD
***@URL :<a href="
http://www.cnpik.com/" target="_blank">
http://www.cnpik.com/</a>
***@E_mail:
[email protected]***@随便用，不收钱 :-)
*/
function cnSubStr($string,$sublen)
{
if($sublen>=strlen($string))
{
return $string;
}
$s="";
for($i=0;$i<$sublen;$i++)
{
if(ord($string{$i})>127)
{
$s.=$string{$i}.$string{++$i};
continue;
}else{
$s.=$string{$i};
continue;
}
}
return $s;
}// End Function cnSubStr($string,$sublen)
/////////// Use like this :
echo "<p>__________________________<p>";
$string="242432反对感是456犯得上广泛大使馆地方7890";
$sublen=strlen($string);
$len=20;
echo $string."<p>";
echo "总长为：".($sublen+1)."<p>";
echo "截取数：".$len."<p>";
for($i=1;$i<=$sublen+1;$i++){
if($i>$len){
echo $i."<b> →</b> ".cnSubStr($string,$i)."…<br>";
continue;
}
echo $i."<b> →</b> ".cnSubStr($string,$i)."<br>";
}
?>本回答被提问者采纳