[SOLVED] Replace words and maintain case-sensitivity of the found string

Replace words and maintain case-sensitivity of the found string

I am creating a php application to format files. So I need to apply a find-replace process while maintaining the case.

For example, I need to replace 'employees' with 'vehicles'.

$file_content = "Employees are employees_category MyEmployees kitEMPLOYEESMATCH";
$f = 'employees';
$r = 'vehicles';

echo str_ireplace($f, $r, $file_content);

Current Output:

vehicles are vehicles_category Myvehicles kitvehiclesMATCH

Desired Output:

Vehicles are vehicles_category MyVehicles kitVEHICLESMATCH

Solution

You could use something like this by replacing for each case separately:

<?php
     $file_content = "Employees are employees_category MyEmployees kitEMPLOYEESMATCH";
     $f = 'employees';
     $r = 'vehicles';

     $res = str_replace($f, $r, $file_content); // replace for lower case
     $res = str_replace(strtoupper($f), strtoupper($r), $res); // replace for upper case
     $res = str_replace(ucwords($f), ucwords($r), $res); // replace for proper case (capital in first letter of word)
     echo $res
   
?>