3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array1 = ['user_firstname' => 'Jack', 'user_lastname' => 'Smith', 'user_address_1' => '123']; $data = []; foreach($array1 as $key=>$value){ $tokens = explode('_', $key, 2); // split the string in an array of strings, using _ as a delimitor. // the 2 is the maximun number of tokens to split the string into, look at explode() docs $keyName = end($tokens); // use last element of the array $data[$keyName] = $value; // assign value to key } print_r($data);
based on 9N3X8
Output for 5.6.38 - 7.2.12
Array ( [firstname] => Jack [lastname] => Smith [address_1] => 123 )