Function to generate random string in php_PHP tutorial

Introducing an article about the function that generates random encryption in PHP. If you need it, you can refer to it. It is a self-defined function and does not come with the system.

The code is as follows  代码如下 复制代码 function encrypt_str( $TXT, $KEY ) {         srand( ( double )microtime( ) * 1000000 );         $ENCRYPT_KEY = md5( rand( 0, 32000 ) );         $CTR = 0;         $TMP = "";         $I = 0;         for ( ;    $I < strlen( $TXT );    ++$I    )         {                 if ( $CTR == strlen( $ENCRYPT_KEY ) )                 {                         $CTR = 0;                 }                 $TMP .= substr( $ENCRYPT_KEY, $CTR, 1 ).( substr( $TXT, $I, 1 ) ^ substr( $ENCRYPT_KEY, $CTR, 1 ) );                 ++$CTR;         }         return keyed_str( $TMP, $KEY ); } function decrypt_str( $TXT, $KEY ) {         $TXT = keyed_str( $TXT, $KEY );         $TMP = "";         $I = 0;         for ( ;    $I < strlen( $TXT );    ++$I    )         {                 $MD5 = substr( $TXT, $I, 1 );                 ++$I;                 $TMP .= substr( $TXT, $I, 1 ) ^ $MD5;         }         return $TMP; } function keyed_str( $TXT, $ENCRYPT_KEY ) {         $ENCRYPT_KEY = md5( $ENCRYPT_KEY );         $CTR = 0;         $TMP = "";         $I = 0;         for ( ;    $I < strlen( $TXT );    ++$I    )         {                 if ( $CTR == strlen( $ENCRYPT_KEY ) )                 {                         $CTR = 0;                 }                 $TMP .= substr( $TXT, $I, 1 ) ^ substr( $ENCRYPT_KEY, $CTR, 1 );                 ++$CTR;         }         return $TMP; }

Copy code

function encrypt_str( $TXT, $KEY )
{
srand((double)microtime() * 1000000);
$ENCRYPT_KEY = md5( rand( 0, 32000 ) );
         $CTR = 0;
         $TMP = "";
         $I = 0;
for ( ; $I < strlen( $TXT ); ++$I )
                                                                                      {
If ( $CTR == strlen( $ENCRYPT_KEY ) )
                                                                                                $CTR = 0;
                                                                                                                            $TMP .= substr( $ENCRYPT_KEY, $CTR, 1 ).( substr( $TXT, $I, 1 ) ^ substr( $ENCRYPT_KEY, $CTR, 1 ) );
                   ++$CTR;
           }
          return keyed_str( $TMP, $KEY );
} function decrypt_str( $TXT, $KEY )
{
$TXT = keyed_str( $TXT, $KEY );
         $TMP = "";
         $I = 0;
for ( ; $I < strlen( $TXT ); ++$I )
                                                                                      {
                    $MD5 = substr( $TXT, $I, 1 );
                                              ++$I;                       $TMP .= substr( $TXT, $I, 1 ) ^ $MD5;
                                                      return $TMP;
} function keyed_str( $TXT, $ENCRYPT_KEY )
{
          $ENCRYPT_KEY = md5( $ENCRYPT_KEY );
         $CTR = 0;
         $TMP = "";
         $I = 0;
for ( ; $I < strlen( $TXT ); ++$I )
                                                                                               If ( $CTR == strlen( $ENCRYPT_KEY ) )
                                                                                                 $CTR = 0;
                                                                                                                           $TMP .= substr( $TXT, $I, 1 ) ^ substr( $ENCRYPT_KEY, $CTR, 1 );
                   ++$CTR;
                                                      return $TMP;
}