php格式化文本（换行）

function TxtFormat($txt) { if((stripos($txt, "\n") > 0)) { return $txt; } $tags = [ '!', '！', '。', '?', '？' ]; $jishu = 0; $lianxu = 30; $insertBr = "\r\n\r\n "; $isFlag = false; $lastchar = ''; $tempChar = ''; $sb = " "; $txt_count = mb_strlen($txt,mb_detect_encoding($txt, array('GB2312','GBK','UTF-8'))); for($i = 0; $i < $txt_count; $i++) { $tempChar = mb_substr($txt, $i, 1, 'utf-8'); if ($tempChar == '\r' || $tempChar == '\n' || $tempChar == ' ' || $tempChar == '　') { continue; } ++$jishu; if ($tempChar == '“') { $isFlag = true; $sb_count = mb_strlen($sb, 'UTF-8'); if(0 < $sb_count) { $lastchar = mb_substr($sb, $sb_count-1, 1, 'utf-8'); } else { $lastchar = '0'; } if ($lastchar != '0' && (($lastchar != ' ' && $lastchar != '：' && $lastchar != ',' && $lastchar != '，') || $lastchar == '”')) { $jishu = 0; $sb .= $insertBr; } $sb .= $tempChar; continue; } if ($isFlag && $tempChar == '”') { $isFlag = !$isFlag; $sb .= $tempChar; continue; } $sb .= $tempChar; foreach ($tags as $tag) { if ($tempChar == $tag) { if (($isFlag == false && $jishu > $lianxu) && $i + 1 < $txt_count && mb_substr($txt, $i+1, 1, 'utf-8') != '”') { $sb .= $insertBr; $jishu = 0; $isFlag = false; break; } } } } return $sb; }