在php中隐藏部分电子邮件地址[关闭]

Question

I'm having trouble.. I want to hide the email address like in the following example : instead of this email address: [e-mail] I want this te********@g***.com I've already tried this function and it didn't work !!

$newemail = preg_replace('/(?<=.).(?=.@)/u','',[e-mail]);

it hides the domain of the email not the whole one ! if you guys have a better one that will be cool because I've searched over and over and I didn't see any topic that solves this problem.

Answer 1

Let's learn regex!

OK, so our requirement:

Convert characters here in bold into *s through regex:

te stemail @ g mail .com

Break down:

1. Convert characters between 2 characters and an @ into *.
2. Convert characters between @, then a character and before ".com" into *.

In other words:

Match characters between 2 characters and an @

  Or characters between @ + a character, and ".com"

Replace with "*".

Proper regex would be:

(?<=.).(?=.*?@)|(?<=@.).*(?=\.com)

So replace your code with

$newemail = preg_replace('/(?<=.).(?=.*?@)|(?<=@.).*(?=\.com)/u', '', '[e-mail]');

View a regex demo.

Optimization: The following regex works the same, but runs faster.

(?<=.).(?=[^@]+@)|(?<=@.).*(?=\.com)