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<?php $array = [ "{contact_firstname}" => "C Client", "{contact_firstname}" => "C Client", "{contact_lastname}" => "N New", "{contact_email}" => "cn.clientnew@gmail.com", "{client_company}" => "", "{client_phonenumber}" => "34567", "{client_country}" => "Finland", "{client_city}" => "dfgh", "{client_zip}" => "9876", "{client_state}" => "wb", "{client_address}" => "sdfghjk" ]; foreach ($array as $key=>$item){ $array[trim($key, "{}")] = $item; unset($array[$key]); } print_r($array);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [contact_firstname] => C Client [contact_lastname] => N New [contact_email] => cn.clientnew@gmail.com [client_company] => [client_phonenumber] => 34567 [client_country] => Finland [client_city] => dfgh [client_zip] => 9876 [client_state] => wb [client_address] => sdfghjk )

preferences:
107.44 ms | 2072 KiB | 4 Q