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Closed 7 years ago.
It's rather simple what I'm trying to achieve, I want input such as
漢aelena@tratata.com
to be:
漢******@tratata.com
So I made this regexp to match between the first char and the '@'.
mb_regex_encoding ('UTF-8' );
mb_ereg_replace('(?<=^.{1}).*?(?=@)','*','漢aelena@tratata.com',1);
The problem though, it would only match it one time, and thus would only put in there one star, instead of six. Something like this, is what I would get:
漢*@tratata.com
Then I wanted to use mb_ereg_replace_callback, to return:
return $matches[1].str_repeat('*', strlen($matches[1]));
Then I read specs and it said mb_ereg_replace_callback is available in PHP 5.4.1 or later.
...Any ideas how could I achieve the same thing?
There is no need to use a callback function, a single regular expression can do it.
(?<=.).(?=.*@)
(?<=.), make sure there is at least one character before so it won't replace the first character.., match any character.(?=.*@), make sure there is a @ somewhere after the character.
Example with function changed to preg_replace with unicode modifier (as suggested):
echo preg_replace('/(?<=.).(?=.*@)/u','*','漢aelena@tratata.com');
Outputs:
漢******@tratata.com
You could use the preg_replace_callback() function from the PCRE family. You can use the u modifier to support UTF-8.
Please note there are some smaller differences between the PCRE (preg_) and POSIX (ereg_) way, besides that the latter is deprecated.
<?php
$email = '漢aelena@tratata.com';
$email = preg_replace_callback('#^(.){1}(.*?)@#u', function($matches)
{
return $matches[1] . str_repeat('*', mb_strlen($matches[2])) . '@';
},
$email);
echo $email; # 漢******@tratata.com
A replacement callback is an option.
echo preg_replace_callback('/(?<=^.).+(?=@)/u', function($match) {
return str_pad('', strlen($match[0]), '*');
}, "something@something.com");
//s*******@something.com
Note I use an anonymous function as the callback - this is PHP >= 5.3 only. If you're on < 5.3, use a named function or one created with function_create().
Why use regexp at all when this can be done much faster?
if(($pos = mb_strpos($email,'@')) > 0) {
for($i=1;$i<=$pos;$i++) {
$email[$i] = '*';
}
}
