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  1. <?php
  2.  
  3. $replacer = static function ($m) {
  4.     return str_repeat('*', strlen($m[1])) . '.' . str_repeat('*', strlen($m[2]));
  5. };
  6.  
  7.  
  8. $ips = ['127.0.0.1', '127.0.0.100', '127.0.100.0'];
  9.  
  10. foreach ($ips as $ip) {
  11. 	$results[] = preg_replace_callback('/(\d{1})\.(\d{1,3})$/', $replacer, $ip);
  12. }
  13.  
  14. print_r($results);
Success #stdin #stdout 0.01s 52488KB
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stdin
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Standard input is empty
stdout
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Array
(
    [0] => 127.0.*.*
    [1] => 127.0.*.***
    [2] => 127.0.10*.*
)
https://ideone.com/PaqyhS
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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