页面显示空格，base64_encode结果：Hw==
类似这种空格有没办法完全过滤掉？我已经用iconv转成gbk再转回来了，还是过滤不了。
$str = iconv('UTF-8', 'GBK//IGNORE', strip_tags($str));$str = iconv('GBK', 'UTF-8//IGNORE', $str)
/** 過濾字符串,保留UTF8字母數字中文及部份符號 * @param String $ostr * @return String */ function filter_utf8_char($ostr){ preg_match_all('/[\x{FF00}-\x{FFEF}|\x{0000}-\x{00ff}|\x{4e00}-\x{9fff}]+/u', $ostr, $matches); $str = join('', $matches[0]); if($str==''){ //含有特殊字符需要逐個處理 $returnstr = ''; $i = 0; $str_length = strlen($ostr); while ($i<=$str_length){ $temp_str = substr($ostr, $i, 1); $ascnum = Ord($temp_str); if ($ascnum>=224){ $returnstr = $returnstr.substr($ostr, $i, 3); $i = $i + 3; }elseif ($ascnum>=192){ $returnstr = $returnstr.substr($ostr, $i, 2); $i = $i + 2; }elseif ($ascnum>=65 && $ascnum<=90){ $returnstr = $returnstr.substr($ostr, $i, 1); $i = $i + 1; }elseif ($ascnum>=128 && $ascnum<=191){ // 特殊字符 $i = $i + 1; }else{ $returnstr = $returnstr.substr($ostr, $i, 1); $i = $i + 1; } } $str = $returnstr; preg_match_all('/[\x{FF00}-\x{FFEF}|\x{0000}-\x{00ff}|\x{4e00}-\x{9fff}]+/u', $str, $matches); $str = join('', $matches[0]); } return $str; } echo bin2hex(base64_decode('Hw=='));
1f US (unit separator) 单元分隔符
之前做过多年底层开发（汇编、C），不熟悉玩不转
之前做过多年底层开发（汇编、C），不熟悉玩不转
/** 過濾字符串,保留UTF8字母數字中文及部份符號 * @param String $ostr * @return String */ function filter_utf8_char($ostr){ preg_match_all('/[\x{FF00}-\x{FFEF}|\x{0000}-\x{00ff}|\x{4e00}-\x{9fff}]+/u', $ostr, $matches); $str = join('', $matches[0]); if($str==''){ //含有特殊字符需要逐個處理 $returnstr = ''; $i = 0; $str_length = strlen($ostr); while ($i<=$str_length){ $temp_str = substr($ostr, $i, 1); $ascnum = Ord($temp_str); if ($ascnum>=224){ $returnstr = $returnstr.substr($ostr, $i, 3); $i = $i + 3; }elseif ($ascnum>=192){ $returnstr = $returnstr.substr($ostr, $i, 2); $i = $i + 2; }elseif ($ascnum>=65 && $ascnum<=90){ $returnstr = $returnstr.substr($ostr, $i, 1); $i = $i + 1; }elseif ($ascnum>=128 && $ascnum<=191){ // 特殊字符 $i = $i + 1; }else{ $returnstr = $returnstr.substr($ostr, $i, 1); $i = $i + 1; } } $str = $returnstr; preg_match_all('/[\x{FF00}-\x{FFEF}|\x{0000}-\x{00ff}|\x{4e00}-\x{9fff}]+/u', $str, $matches); $str = join('', $matches[0]); } return $str; }
/** 過濾字符串,保留UTF8字母數字中文及部份符號 * @param String $ostr * @return String */ function filter_utf8_char($ostr){ preg_match_all('/[\x{FF00}-\x{FFEF}|\x{0000}-\x{00ff}|\x{4e00}-\x{9fff}]+/u', $ostr, $matches); $str = join('', $matches[0]); if($str==''){ //含有特殊字符需要逐個處理 $returnstr = ''; $i = 0; $str_length = strlen($ostr); while ($i<=$str_length){ $temp_str = substr($ostr, $i, 1); $ascnum = Ord($temp_str); if ($ascnum>=224){ $returnstr = $returnstr.substr($ostr, $i, 3); $i = $i + 3; }elseif ($ascnum>=192){ $returnstr = $returnstr.substr($ostr, $i, 2); $i = $i + 2; }elseif ($ascnum>=65 && $ascnum<=90){ $returnstr = $returnstr.substr($ostr, $i, 1); $i = $i + 1; }elseif ($ascnum>=128 && $ascnum<=191){ // 特殊字符 $i = $i + 1; }else{ $returnstr = $returnstr.substr($ostr, $i, 1); $i = $i + 1; } } $str = $returnstr; preg_match_all('/[\x{FF00}-\x{FFEF}|\x{0000}-\x{00ff}|\x{4e00}-\x{9fff}]+/u', $str, $matches); $str = join('', $matches[0]); } return $str; } 
