PHP summary generation function (no garbled code)_PHP tutorial

When using it, you must first strip_tags() the content to be generated. Of course, you can also add strip_tags() directly to the function. I didn't do it. Just add it yourself. The following is the function:

Copy code The code is as follows:

function cutstr($string, $length,$charset,$dot ) {//Character, interception length, character set, end character
if(strlen($string) <= $length) {
return $string;
}
$pre = chr( 1);
$end = chr(1);
//Protect special string
$string = str_replace(array('&', '"', '<', '>' ), array($pre.'&'.$end, $pre.'"'.$end, $pre.'<'.$end, $pre.'>'.$end), $string) ;
$strcut = '';
if(strtolower($charset) == 'utf-8') {
$n = $tn = $noc = 0;
while($n < strlen($string)) {
$t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 <= $ t && $t <= 126)) {
$tn = 1; $n++; $noc++;
} elseif(194 <= $t && $t <= 223) {
$ tn = 2; $n += 2; $noc += 2;
} elseif(224 <= $t && $t <= 239) {
$tn = 3; $n += 3 ; $noc += 2;
} elseif(240 <= $t && $t <= 247) {
$tn = 4; $n += 4; $noc += 2;
} elseif(248 <= $t && $t <= 251) {
$tn = 5; $n += 5; $noc += 2;
} elseif($t == 252 || $t == 253) {
$tn = 6; $n += 6; $noc += 2;
} else {
$n++;
}
if( $noc >= $length) {
break;
}
}
if($noc > $length) {
$n -= $tn;
}
$strcut = substr($string, 0, $n);
} else {
for($i = 0; $i < $length; $i++) {
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
}
//Restore Special string
$strcut = str_replace(array($pre.'&'.$end, $pre.'"'.$end, $pre.'<'.$end, $pre.'> '.$end), array('&', '"', '<', '>'), $strcut);
//Fix the problem of special string truncation
$pos = strrpos($s, chr(1));
if($pos !== false) {
$strcut = substr($s,0,$pos);
}
return $strcut.$dot;
}

http://www.bkjia.com/PHPjc/325057.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/325057.htmlTechArticleWhen using it, you must first strip_tags() the content to be generated. Of course, you can also strip_tags() is added directly to the function. I didn't do it. Just add it yourself. The following is the letter...