How to properly bold the decoded data in PHP

Question

I am posting data to database which requires that I encode it. To this effect I used htmlentities() and to decode it am using html_entity_decode()

Here is my issue: My problem is that the decoded result is does not bold the "Helloworld" rather it shows back the Helloworld surrounded by the HTML bold tags.

$str = "<b>Hello world</b>";

echo $en = htmlentities(htmlentities($str));

echo "<br>decode<br>";

echo  $result = html_entity_decode($en);

Answer 1

由于您要编码两次，因此您也必须解码两次。

echo html_entity_decode(html_entity_decode($en));