How to hide part of email using php?

Question

PHP

Email is taken from the database and displayed on the screen, how to hide part of the address?
For example, in the database there is "[email protected]", but it is necessary that it would display "p***[email protected]" I was
surprised that Google did not give answers, except
$slovo=substr($slovo,0, (strlen($slovo)-1) );

Answer 1

$slovo=preg_replace('/([a-z0-9]{1})(.*?)([a-z0-9]{2}@...)/ism' "$1***$3", $slovo);

Answer 2

Leaves only the first and last character before @ unclosed:

$email = '[email protected]';
$length = strpos($email, '@') - 2;
$asterisk = '*';
for($i = 1; $i < $length; $i++)
  $asterisk .= '*'; 
$email = substr_replace($email, $asterisk, 1, $length);

Answer 3

Badly searched - stackoverflow.com/questions/20545301/partially-hid...