Modify WordPress plugin function in ‘functions.php’

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I need to change the value of a function from a WordPress plugin that I’m using.

If I do it in the original plugin file, it works perfectly, but I’d rather make it in file functions.php to avoid problems on plugin update.

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I need to change this: 

public static function loop_shop_per_page() {
    return get_option( 'posts_per_page' );
}

Into this: 

public static function loop_shop_per_page() {
    return '-1';
}

How would I go to create a filter in file functions.php to do just that?

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1 comment

  1. Without changing the core plugin code, I don’t think you can achieve what you want.

    Well written plugins usually have the apply_filters method called on anything that might need to be tweaked by a theme developer. As such, the plugin code should look something like this:

    // Using apply_filters() to allow overriding of values...
public static function loop_shop_per_page() {
    $value = get_option( 'posts_per_page' );
    return apply_filters('filter_loop_shop_per_page', $value);
}

    Then, in your functions.php file, you’d be able to change the value on for that by adding a filter like so:

    add_filter('filter_loop_shop_per_page', 'mytheme_loop_shop_per_page');

function mytheme_loop_shop_per_page($value){
    return -1;
}

    Unfortunately, unless you edit the plugin code, you probably won’t be able to do what you want. You could always search the plugin for apply_filters to see if there’s anything else you might be able to tweak to achieve the same results.

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