Menu
I want to encrypt the original string after i click the encrypt button and inputs element will not clear and after i click the decrypt it will decrypt. My problem is after i click the decrypt there is no value to the decrypt only the encrypt is moving. Can someone help me about this?
here is the output after i click the decrypt.
here is my code.
<?php
/*
* PHP mcrypt - Basic encryption and decryption of a string
*/
error_reporting(E_ALL ^ E_NOTICE);
$secret_key = "thisismykey12345";
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
if(isset($_POST['encrypt'])){
$string = $_POST['ostring'];
$encrypted_string = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $secret_key, $string, MCRYPT_MODE_CBC, $iv);
}
else if(isset($_POST['decrypt'])){
$decrypted_string = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $secret_key, $encrypted_string, MCRYPT_MODE_CBC, $iv);
}
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<form method="post">
Original String <input type="text" name="ostring" value="<?php echo $string; ?>"><br>
<input type="submit" name="encrypt" value="Encrypt"><br>
Encrypted String <input type="text" style="width:500px;" name="encrypted" value="<?php echo $encrypted_string; ?>"><br>
<input type="submit" name="encrypt" value="Decrypt"><br>
Decrypted String <input type="text" style="width:500px" name="decrypted" value="<?php echo $decrypted_string; ?>"><br>
</form>
</form>
</body>
</html>
327
asked Feb 11 '26 23:02
This part has 2 logical flaws:
if(isset($_POST['encrypt'])){
$string = $_POST['ostring'];
$encrypted_string = ...;
}
else if(isset($_POST['decrypt'])){
$decrypted_string = ...$encrypted_string...;
}
$decrypted_string will never be set because it relies on $encrypted_string. But $encrypted_string only exists if the execution path enters the first if block and skips the elseif block. ostring is available before encrypting even though it's requiredPut the two execution paths in separate if blocks:
if(isset($_POST['encrypt'],$_POST['ostring'])){
$encrypted_string = ...;
}
if(isset($_POST['decrypt'],$encrypted_string)){
$decrypted_string = ...;
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
