- var_dump: documentation ( source)
- strtr: documentation ( source)
<?php
$string = 'kur̃šių nerijà';
$matrix = [
'ā' => 'a',
'ē' => 'e',
'ī' => 'i',
'ū' => 'u',
'š' => 's',
'ģ' => 'g',
'ķ' => 'k',
'ļ' => 'l',
'ž' => 'z',
'č' => 'c',
'ņ' => 'n',
];
$string = strtr($string, $matrix);
var_dump($string);