php自动截取中文字符串 和 取出html、css、js格式函数
//中文字符串截取方法
function ezk_substr($string, $start = 0, $sublen, $code = "utf-8"){
//$string 要截取的字符串 $start 截取时的开始位置 $sublen 截取的长度 $code 截取的字符格式
if($code == "utf-8") {
$pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/";
preg_match_all($pa, $string, $t_string);
if(count($t_string[0]) - $start > $sublen) return join("", array_slice($t_string[0], $start, $sublen))."...";
return join("", array_slice($t_string[0], $start, $sublen));
}else {
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string);
$tmpstr = "";
for($i=0; $i< $strlen; $i++) {
if($i>=$start && $i< ($start+$sublen)) {
if(ord(substr($string, $i, 1))>129) {
$tmpstr.= substr($string, $i, 2);
}else {
$tmpstr.= substr($string, $i, 1);
}
}
if(ord(substr($string, $i, 1))>129) $i++;
}
if(strlen($tmpstr)< $strlen ) $tmpstr.= "...";
return $tmpstr;
}
}
//去除html标签、css样式、js、空格等格式的功能(格式化html文本)
function ezk_cutstr_html($string){
$string = strip_tags($string);
$string = preg_replace ("/
/is", "", $string);
$string = preg_replace ("/ | /is", "", $string);
$string = preg_replace ("/ /is", "", $string);
preg_match_all("/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/", $string, $t_string);
return $string;
}
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