php截断字符串
function htmlencode($string) { if(is_array($string)) { foreach($string as $key => $val) { $string[$key] = htmlencode($val); } } else { $string = preg_replace('/&((#(\d{3,5}|x[a-fA-F0-9]{4})|[a-zA-Z][a-z0-9]{2,5});)/', '&\\1', str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $string)); } return $string; } function cutStr($string, $length = 0, $dot = '') { $string = strip_tags($string); $string = trim($string); $string = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $string); $strlen = strlen(phpcharset($string, 'GBK')); $charset = mb_detect_encoding($string, array('ASCII', 'UTF-8', 'GBK', 'GB2312', 'BIG5')); if($length && ($strlen > $length)) { $wordscut = ''; if(strtolower($charset) == 'utf-8') { $n = 0; $tn = 0; $noc = 0; while($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; } $wordscut = substr($string, 0, $n); } else { for($i = 0; $i < $length - 1; $i++) { if(ord($string[$i]) > 127) { $wordscut .= $string[$i].$string[$i + 1]; $i++; } else { $wordscut .= $string[$i]; } } } $wordscut .= $dot; $string = $wordscut; } return htmlencode($string); }