Chinese interception without garbled (2 methods)

Chinese interception without garbled (2 methods) $str the string to intercept $len number of characters intercepted $chars number of characters that have been intercepted $res a saved string $chars Save the number of strings that have been intercepted Offset of $offset intercept The number of bytes $length string If $len> $str the number of characters, resulting in a meaningless while loop ($offset < $length limit) function Utf8sub ($STR, $len) { if ($len <=0) { return; } $res = ""; $offset = 0; $chars = 0; $length =strlen ($STR); while ($chars < $len && $offset < $length) { $hign =decbin (Ord (substr ($str, $offset, 1))); if (strlen ($hign) <8) { $count = 1; }elseif (substr ($hign, 0, 3) = = "110") { $count = 2; }elseif (substr ($hign, 0,4) = = "1110") { $count = 3; }elseif (substr ($hign, 0,5) = = "11110") { $count = 4; }elseif (substr ($hign, 0,6) = = "111110") { $count = 5; }elseif (substr ($hign, 0,7) = = "1111110") { $count = 6; } $res. =substr ($str, $offset, $count); $offset + = $count; $chars +=1; } return $res; } function Utf8sub1 ($STR, $len) { $chars = 0; $res = ""; $offset = 0; $length =strlen ($STR); while ($chars < $len && $offset < $length) { $hign =decbin (Ord (substr ($str, $offset, 1))); if (strlen ($hign) <8) { $count = 1; }elseif ($hign & "11100000" = = "11000000") { $count = 2; }elseif ($hign & "11110000" = = "11100000") { $count = 3; }elseif ($hign & "11111000" = = "11110000") { $count = 4; }elseif ($hign & "11111100" = = "11111000") { $count = 5; }elseif ($hign & "11111110" = = "11111100") { $count = 6; } $res. =substr ($str, $offset, $count); $chars + +; $offset + = $count; } return $res; } $a = "Chinese ah people hdj"; Echo utf8sub ($a, 5); ?> Copy Code

