php ascii to unicode method: first create a PHP sample file; then use "function decode($str, $prefix = ""){...}" to achieve conversion.
The operating environment of this article: Windows7 system, PHP7.1 version, Dell G3 computer
How to convert php ascii to unicode?
php ascii to unicode
The code is as follows:
class Coder { public static function ascii2unicode($c) { $len = strlen($c); $a = 0; $ascill = ''; while ($a < $len) { $ud = 0; if (ord($c{$a}) >= 0 && ord($c{$a}) <= 127) { $ud = ord($c{$a}); $a += 1; } else if (ord($c{$a}) >= 192 && ord($c{$a}) <= 223) { $ud = (ord($c{$a}) - 192) * 64 + (ord($c{$a + 1}) - 128); $a += 2; } else if (ord($c{$a}) >= 224 && ord($c{$a}) <= 239) { $ud = (ord($c{$a}) - 224) * 4096 + (ord($c{$a + 1}) - 128) * 64 + (ord($c{$a + 2}) - 128); $a += 3; } else if (ord($c{$a}) >= 240 && ord($c{$a}) <= 247) { $ud = (ord($c{$a}) - 240) * 262144 + (ord($c{$a + 1}) - 128) * 4096 + (ord($c{$a + 2}) - 128) * 64 + (ord($c{$a + 3}) - 128); $a += 4; } else if (ord($c{$a}) >= 248 && ord($c{$a}) <= 251) { $ud = (ord($c{$a}) - 248) * 16777216 + (ord($c{$a + 1}) - 128) * 262144 + (ord($c{$a + 2}) - 128) * 4096 + (ord($c{$a + 3}) - 128) * 64 + (ord($c{$a + 4}) - 128); $a += 5; } else if (ord($c{$a}) >= 252 && ord($c{$a}) <= 253) { $ud = (ord($c{$a}) - 252) * 1073741824 + (ord($c{$a + 1}) - 128) * 16777216 + (ord($c{$a + 2}) - 128) * 262144 + (ord($c{$a + 3}) - 128) * 4096 + (ord($c{$a + 4}) - 128) * 64 + (ord($c{$a + 5}) - 128); $a += 6; } else if (ord($c{$a}) >= 254 && ord($c{$a}) <= 255) { //error $ud = false; } $ascill .= "&#$ud;"; } return $ascill; } } /** * 将ascii码转为字符串 * @param type $str 要解码的字符串 * @param type $prefix 前缀,默认:&# * @return type */ function decode($str, $prefix = "&#") { $str = str_replace($prefix, "", $str); $a = explode(";", $str); foreach ($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; }
Recommended learning: "PHP Video Tutorial"
The above is the detailed content of How to convert php ascii to unicode. For more information, please follow other related articles on the PHP Chinese website!