1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | /** * 字符截取 支持UTF8/GBK * @param $string * @param $length * @PHP新手 www.phpxs.com */ function str_cut( $string , $length , $dot = '...' ) { $strlen = strlen ( $string ); if ( $strlen <= $length ) return $string ; $string = str_replace ( array ( ' ' , ' ' , '&' , '"' , ''' , '“' , '”' , '—' , '<' , '>' , '·' , '…' ), array ( '∵' , ' ' , '&' , '"' , " '", ' “ ', ' ” ', ' — ', ' < ', ' > ', ' · ', ' …'), $string ); $strcut = '' ; if ( strtolower (CHARSET) == 'utf-8' ) { $length = intval ( $length - strlen ( $dot )- $length /3); $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 ); $strcut = str_replace ( array ( '∵' , '&' , '"' , " '", ' “ ', ' ” ', ' — ', ' < ', ' > ', ' · ', ' … '), array(' ', ' & ', ' " ', ' ' ', ' “ ', ' ” ', ' — ', ' < ', ' > ', ' · ', ' …'), $strcut ); } else { $dotlen = strlen ( $dot ); $maxi = $length - $dotlen - 1; $current_str = '' ; $search_arr = array ( '&' , ' ' , '"' , " '", ' “ ', ' ” ', ' — ', ' < ', ' > ', ' · ', ' … ',' ∵'); $replace_arr = array ( '&' , ' ' , '"' , ''' , '“' , '”' , '—' , '<' , '>' , '·' , '…' , ' ' ); $search_flip = array_flip ( $search_arr ); for ( $i = 0; $i < $maxi ; $i ++) { $current_str = ord( $string [ $i ]) > 127 ? $string [ $i ]. $string [++ $i ] : $string [ $i ]; if (in_array( $current_str , $search_arr )) { $key = $search_flip [ $current_str ]; $current_str = str_replace ( $search_arr [ $key ], $replace_arr [ $key ], $current_str ); } $strcut .= $current_str ; } } return $strcut . $dot ; } |
扫码二维码 获取免费视频学习资料
- 本文固定链接: http://phpxs.com/post/2912/
- 转载请注明:转载必须在正文中标注并保留原文链接
- 扫码: 扫上方二维码获取免费视频资料
查 看2022高级编程视频教程免费获取