Heim > Artikel > Backend-Entwicklung > PHP fängt einen String einer bestimmten Länge ab
function ssubstr($string, $length, $dot = ' ...') { global $charset; if(strlen($string) <= $length) { return $string; } $string = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $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]; } } $strcut = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $strcut); return $strcut.$dot; } 截取一定长度的字符串(该函数对gb2312使用有效) <? function wordscut($string, $length ,$sss=0) { if(strlen($string) > $length) { if($sss){ $length=$length - 3; $addstr=@# ...@#; } for($i = 0; $i < $length; $i++) { if(ord($string[$i]) > 127) { $wordscut .= $string[$i].$string[$i + 1]; // $i++; //开源软件:phpfensi.com } else { $wordscut .= $string[$i]; } } return $wordscut.$addstr; } return $string; } ?>