public static function edcode($string, $operation, $key = 'ePHP')
    {
        // ENCODE
        $key_length    = strlen($key);
        $string        = $operation == 'DECODE' ? \ePHP\Misc\Func::safe_b64decode($string) : substr(md5($string . $key), 0, 8) . $string;
        $string_length = strlen($string);
        $rndkey        = $box = array();
        $result        = '';

        for ($i = 0; $i <= 255; $i++) {
            $rndkey[$i] = ord($key[$i % $key_length]);
            $box[$i]    = $i;
        }

        for ($j = $i = 0; $i < 256; $i++) {
            $j       = ($j + $box[$i] + $rndkey[$i]) % 256;
            $tmp     = $box[$i];
            $box[$i] = $box[$j];
            $box[$j] = $tmp;
        }

        for ($a = $j = $i = 0; $i < $string_length; $i++) {
            $a       = ($a + 1) % 256;
            $j       = ($j + $box[$a]) % 256;
            $tmp     = $box[$a];
            $box[$a] = $box[$j];
            $box[$j] = $tmp;
            $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
        }

        // DECODE
        if ($operation == 'DECODE') {
            if (substr($result, 0, 8) == substr(md5(substr($result, 8) . $key), 0, 8)) {
                return substr($result, 8);
            } else {
                return '';
            }
        } else {
            return \ePHP\Misc\Func::safe_b64encode($result);
        }
    }
public static function edcode($string, $operation, $key = 'ePHP')
    {
        // ENCODE
        $key_length    = strlen($key);
        $string        = $operation == 'DECODE' ? \ePHP\Misc\Func::safe_b64decode($string) : substr(md5($string . $key), 0, 8) . $string;
        $string_length = strlen($string);
        $rndkey        = $box = array();
        $result        = '';

        for ($i = 0; $i <= 255; $i++) {
            $rndkey[$i] = ord($key[$i % $key_length]);
            $box[$i]    = $i;
        }

        for ($j = $i = 0; $i < 256; $i++) {
            $j       = ($j + $box[$i] + $rndkey[$i]) % 256;
            $tmp     = $box[$i];
            $box[$i] = $box[$j];
            $box[$j] = $tmp;
        }

        for ($a = $j = $i = 0; $i < $string_length; $i++) {
            $a       = ($a + 1) % 256;
            $j       = ($j + $box[$a]) % 256;
            $tmp     = $box[$a];
            $box[$a] = $box[$j];
            $box[$j] = $tmp;
            $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
        }

        // DECODE
        if ($operation == 'DECODE') {
            if (substr($result, 0, 8) == substr(md5(substr($result, 8) . $key), 0, 8)) {
                return substr($result, 8);
            } else {
                return '';
            }
        } else {
            return \ePHP\Misc\Func::safe_b64encode($result);
        }
    }
public static function edcode ( $ string , $ operation , $ key = 'ePHP' ) { // ENCODE $ key_length = strlen ( $ key ) ; $ string = $ operation == 'DECODE' ? \ ePHP \ Misc \ Func :: safe_b64decode ( $ string ) : substr ( md5 ( $ string . $ key ) , 0 , 8 ) . $ string ; $ string_length = strlen ( $ string ) ; $ rndkey = $ box = array ( ) ; $ result = '' ; for ( $ i = 0 ; $ i <= 255 ; $ i ++ ) { $ rndkey [ $ i ] = ord ( $ key [ $ i % $ key_length ] ) ; $ box [ $ i ] = $ i ; } for ( $ j = $ i = 0 ; $ i < 256 ; $ i ++ ) { $ j = ( $ j + $ box [ $ i ] + $ rndkey [ $ i ] ) % 256 ; $ tmp = $ box [ $ i ] ; $ box [ $ i ] = $ box [ $ j ] ; $ box [ $ j ] = $ tmp ; } for ( $ a = $ j = $ i = 0 ; $ i < $ string_length ; $ i ++ ) { $ a = ( $ a + 1 ) % 256 ; $ j = ( $ j + $ box [ $ a ] ) % 256 ; $ tmp = $ box [ $ a ] ; $ box [ $ a ] = $ box [ $ j ] ; $ box [ $ j ] = $ tmp ; $ result .= chr ( ord ( $ string [ $ i ] ) ^ ( $ box [ ( $ box [ $ a ] + $ box [ $ j ] ) % 256 ] ) ) ; } // DECODE if ( $ operation == 'DECODE' ) { if ( substr ( $ result , 0 , 8 ) == substr ( md5 ( substr ( $ result , 8 ) . $ key ) , 0 , 8 ) ) { return substr ( $ result , 8 ) ; } else { return '' ; } } else { return \ ePHP \ Misc \ Func :: safe_b64encode ( $ result ) ; } }
Others encode or decode

<code>
echo $str = edcode('1371817454', 'ENCODE','1');
echo edcode('XbfSC2GOpSTtwHwOIDW7Fg', 'DECODE','2000558');
</code>

@param string $string 密文
@param string $operation options DECODE | DECODE
@param string $key default 'ePHP'
@return string
Others encode or decode