Conversion of PHP ASCII code and string

[Code]php Code:

<?php

Class ASCII {

/**

* Convert ASCII code to string

* @param type $str the string to decode

* @param type $prefix prefix, default: &#

* @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) {

$utf. = Chr (($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;

}

/**

* Converts a string to an ASCII code

* @param type $c a string to encode

* @param type $prefix prefix, default: &#

* @return String

*/

function encode ($c, $prefix = "&#") {

$len = strlen ($c);

$a = 0;

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}) >= && ord ($c {$a}) <= 223) {

$ud = (Ord ($c {$a})-The Ord + ($c {$a + 1})-128);

$a + 2;

else if (Ord ($c {$a}) >= 224 && Ord ($c {$a}) <= 239) {

$ud = (Ord ($c {$a})-224) * 4096 + (ord ($c {$a + 1})-128) * + (ord ($c {$a + 2})-128);

$a + 3;

else if (Ord ($c {$a}) >= && ord ($c {$a}) <= 247) {

$ud = ($c {$a})-Ord * 262144 + (ord ($c {$a + 1})-128) * 4096 + (ord ($c {$a + 2})-128) * + (ord ($c {$a + 3})-12 8);

$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 {$a + 3} )-128) * + (ord ($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 {$a + 4})-128) * + (ord ($c {$a + 5})-128);

$a + 6;

else if (Ord ($c {$a}) >= 254 && Ord ($c {$a}) <= 255) {//error

$ud = false;

}

$scill. = $prefix. $ud. ";";

}

return $scill;

}

}

/*

PHP turn to ASCII

Require_once "ascii_class.php";

*/

$AA = new ASCII;

echo "<xmp>";

echo $str = $aa->encode ("PHP two times Development: www.php2.cc");

echo "</xmp>";

echo $aa->decode ($STR);

?>