WordPress Replace Text String Dynamically.php

function replace_text_wsv($text){
    $replace = array(
        // 'WORD TO REPLACE' => 'REPLACE WORD WITH THIS'
        'Find This' => 'Replace With This',
        'Find This' => 'Replace With This',
        'Find This' => 'Replace With This'
    );
    $text = str_replace(array_keys($replace), $replace, $text);
    return $text;
}
add_filter('the_content', 'replace_text_wsv');
add_filter('the_excerpt', 'replace_text_wsv');