How to Convert Strings and Hexadecimal Values in PHP for Secure Encryption?

Converting Strings and Hexadecimal Values in PHP: Troubleshooting Encryption Issues

In your code snippet, the issue may lie in the XOR encryption process before string-to-hex conversion. Here's a corrected approach to convert between strings and hex values:

function strToHex($string)
{
    return bin2hex($string);
}

function hexToStr($hex)
{
    return hex2bin($hex);
}

To convert a string ("this is the test") to a hex string:

$hexValue = strToHex("this is the test"); // Result: 74686973206973207468652074657374

To convert a hex string back to a string:

$stringValue = hexToStr("74686973206973207468652074657374"); // Result: this is the test

By using bin2hex and hex2bin, you'll ensure that the hexadecimal representation of the string preserves its binary data, making it suitable for XOR encryption and decryption.

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