Modifying a string with preg_replace function

08/05/2015 - PHP

Example below replaces username and password with stars and leaves other parts intact.


Function


function obscureUriDetails($url)
{
    return preg_replace('@(ftp|http)://.*:.*\@@', '$1://****:****@', $url);
}

Example


echo obscureUriDetails('http://username-goes-here:password-goes-here@drop.html/part/file.csv');
// http://*******:*******@drop.html/part/file.csv

echo obscureUriDetails('ftp://username-goes-here:password-goes-here@drop.html/part/file.csv');
// fpt://*******:*******@drop.html/part/file.csv

Json example


$json = '{
  "username": "u",
  "key_1": "hello",
  "account_no": 44,
  "inner": [
    {
      "password": "111111",
      "name": "user_x",
      "account_no": 33,
      "parent": {
        "sub": {
          "account_no": 11,
          "username": "user1",
          "password": "123123",
          "account_no": 22
        }
      }
    }
  ],
  "key_3": []
}';

$result = preg_replace(
    [
        '/\"account_no\": \d+/',
        '/\"username\": \".*?\"/',
    ],
    [
        '"account_no": 0',
        '"username": "hidden"',
    ],
    $json
);

{
  "username": "hidden",
  "key_1": "hello",
  "account_no": 0,
  "inner": [
    {
      "password": "111111",
      "name": "user_x",
      "account_no": 0,
      "parent": {
        "sub": {
          "account_no": 0,
          "username": "hidden",
          "password": "123123",
          "account_no": 0
        }
      }
    }
  ],
  "key_3": [
    
  ]
}