3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function callback($s) { var_dump($s); return substr_replace($s[0], str_repeat('*', strlen($s[0])), 0, -4); } $values = array( '5746244234383238', '746244234383238', '46244234383238', '6244234383238', '244234383238', '44234383238', ); foreach ($values as $value) var_dump(preg_replace_callback('/\d{12,16}/', 'callback', $value));
Output for 4.3.0 - 7.1.0
array(1) { [0]=> string(16) "5746244234383238" } string(20) "****************3238" array(1) { [0]=> string(15) "746244234383238" } string(19) "***************3238" array(1) { [0]=> string(14) "46244234383238" } string(18) "**************3238" array(1) { [0]=> string(13) "6244234383238" } string(17) "*************3238" array(1) { [0]=> string(12) "244234383238" } string(16) "************3238" string(11) "44234383238"