实现PHP 转 ASCII
<?php class ascii{function decode($str){ preg_match_all( "/(d{2,5})/", $str,$a); $a = $a[0]; foreach ($a as $dec) { if ($dec < 128) { $utf .= chr($dec); } else if ($dec < 2048) { $utf .= chr(192 + (($dec - ($dec % 64)) / 64)); $utf .= chr(128 + ($dec % 64)); } else { $utf .= chr(224 + (($dec - ($dec % 4096)) / 4096)); $utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64)); $utf .= chr(128 + ($dec % 64)); } } return $utf;}function encode($c){ $len = strlen($c); $a = 0; while ($a < $len) { $ud = 0; if (ord($c{$a}) >=0 && ord($c{$a})=192 && ord($c{$a})=224 && ord($c{$a})=240 && ord($c{$a})=248 && ord($c{$a})=252 && ord($c{$a})=254 && ord($c{$a}) encode("a");?>
