wordpress中的句柄是什么？

Question

I'm learning to developing in Php and Wordpress. Somebody can explain to me what mean a handle in this context:

<?php wp_enqueue_style( $handle, $src, $deps, $ver, $media ); ?>

Parameters $handle (string) (required) Name used as a handle for the stylesheet. As a special case, if the string contains a '?' character, the preceding part of the string refers to the registered handle, and the succeeding part is appended to the URL as a query string. Default: None

url: https://codex.wordpress.org/Function_Reference/wp_enqueue_style

Thanks!! :)

Answer 1

In general, a handle is just an identifier. In this case, the handle is just a unique name for the script you are enqueuing.

If you were using wp_register_style, you could use the handle to enqueue the registered style:

wp_register_style('style-id', get_template_directory_uri() . '/path/to/style.css', array(), '1.0');
/* ... */
wp_enqueue_style('style-id');

You can also dequeue styles using the handle as a way to reference the desired style.

The documentation you referenced pertains to a special case when using wp_enqueue_script. In this instance you can use the handle parameter to also specify a query string for your script:

wp_enqueue_style('style-handle?query=string', get_template_directory_uri() . '/path/to/style.css', array(), '1.0');

In the above example, the handle is style-handle. The portion after the ? will be added the the enqueued script as a query string.