Replacing "Read more" text on the buttons of post query loop (WordPress archive page)

Question

I tried to replace "Read more" text on the buttons at the end of each post in the post query loop, e.g. archive page, using 3 versions of codes below. None of them worked, the text still remained "Read more" the same.

// 1
function custom_search_read_more_text( $more ) {
 global $post;
 return '<a class="more-link" href="' . get_permalink( $post ) . '">View Product</a>';
}
add_filter( 'excerpt_more', 'custom_search_read_more_text' );
add_filter( 'the_content_more_link', 'custom_search_read_more_text' );
add_filter('the_excerpt', 'custom_search_read_more_text');
// 2
function new_excerpt_more($more) {
 global $post;
 return '<a class="more-link" href="' . get_permalink( $post->ID ) . '"> View Product </a>';
}
add_filter('excerpt_more', 'new_excerpt_more');
add_filter( 'the_content_more_link', 'new_excerpt_more' );
add_filter('the_excerpt', 'new_excerpt_more');
// 3
function custom_excerpt_read_more_link($text) {
 global $post;
 $text = preg_replace('/(\s*\[&hellip;\]\s*)|(\s*\[...\]\s*)/', '', $text); 
 $read_more_link = ' <a class="more-link" href="' . get_permalink( $post->ID ) . '">View Product</a>';
 return $text . $read_more_link;
}
add_filter('excerpt_more', 'custom_excerpt_read_more_link');
add_filter( 'the_content_more_link', 'custom_excerpt_read_more_link' );
add_filter('the_excerpt', 'custom_excerpt_read_more_link');

Note that my full code will include checking statement to replace the customized text only to product items as below:

function custom_search_read_more_text( $more ) {
 if ( is_search() ) {
 global $post;
 if ( 'product' === get_post_type( $post ) ) {
 return ' <a class="more-link" href="' . get_permalink( $post ) . '">View Product</a>';
 } else {
 return ' <a class="more-link" href="' . get_permalink( $post ) . '">Read More</a>';
 }
 }
 return $more;
}
add_filter( 'excerpt_more', 'custom_search_read_more_text' );

But as I tried just plain returning without the if, none of the above ever worked. So I simplified it here to make they read easier.

• cabrerahector: That "Read more" text could be hard-coded. Have you checked the theme files yet?
• FUFY: Actually my full code will include checking statement to replace the customized text only to product items. But as I tried just plain returning without the if, none of the above ever worked. So I simplified it here to make they read easier.
• disinfor: What @cabrerahector is saying, is that your theme files may have "read more" in the actual file and not using any sort of filter/hook from WP. So no matter what you are doing, you cannot change the text, because it's not being output via the_excerpt or some other function. Do you have code example where you are trying to change it?
• FUFY: The latest code I have now is the one under "Note that my full code..." above where I put it in the theme's functions.php.
• gael: What theme are you using?