What is a handle in wordpress?

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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

Read More

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

Thanks!! 🙂

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  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.