php ascii转unicode的方法：首先创建一个PHP示例文件；然后通过“function decode($str, $prefix = "&#"){...}”实现转换即可。
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本文操作环境：Windows7系统、PHP7.1版，Dell G3电脑
php ascii怎么转unicode?
php ascii转unicode
代码如下：
class Coder{public static function ascii2unicode($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;}登录后复制推荐学习：《PHP视频教程》
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