What are the limitations of using random replacement logic, like replacing I with Ü only 50% of the time, to filter out inappropriate words in PHP applications?

Random replacement logic may not effectively filter out inappropriate words as it relies on chance. To improve the filtering process, a better approach would be to create a comprehensive list of inappropriate words and their corresponding replacements. This way, each inappropriate word can be replaced consistently with a suitable alternative. 

$inappropriateWords = array("badword1" => "goodword1", "badword2" => "goodword2");

function filterInappropriateWords($input) {
    global $inappropriateWords;
    
    foreach($inappropriateWords as $badWord => $goodWord) {
        $input = str_ireplace($badWord, $goodWord, $input);
    }
    
    return $input;
}

$input = "This is a badword1 sentence with badword2.";
$filteredInput = filterInappropriateWords($input);
echo $filteredInput;

Keywords

random replacement logic inappropriate words limitations filtering PHP applications

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