The **`hex2bin` method** in PHP can be used to convert a hexadecimally encoded string to a binary string. However, this method doesn't convert a hexadecimal number to a binary number. 
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## Syntax
```php
hex2bin(string $string): string|false
```
## Parameters
`hex2bin` takes the hex string that will be converted to a binary string as a parameter.
## Return value
The `hex2bin` method returns a string upon success; otherwise, it returns `false`.
## Code
In this example, we are going to decode the encoded string `Hello, educative!`.

<?php

echo hex2bin("48656c6c6f2c2065647563617469766521");

How to decode a hexadecimal string in PHP

The hex2bin method in PHP converts a hexadecimal encoded string to a binary string, not a binary number.