Function __global->filter_css

Definitions

sources/mail.php

  • Filter out any CSS selector blocks from the given CSS if they definitely do not affect the given (X)HTML.While this is a clever algorithm, it isn't so clever as to actually try and match each selector against a DOM tree. If any segment of a compound selector matches, match is assumed.
  • Visibility: public
  • Is abstract?: No
  • Is static?: No
  • Is final?: No
  • Returns: string

Parameters

Name Type Passed by reference? Variadic? Default Set Range Description
$c ID_TEXT No No required parameter N/A N/A CSS file
$theme ?ID_TEXT No No required parameter N/A N/A Theme (null: default)
$context string No No required parameter N/A N/A (X) HTML context under which CSS is filtered

Returns

  • Filtered CSS
  • Type: string
  • Set: N/A
  • Range: N/A

Preview

Code (PHP)

/**
 * Filter out any CSS selector blocks from the given CSS if they definitely do not affect the given (X)HTML.While this is a clever algorithm, it isn't so clever as to actually try and match each selector against a DOM tree. If any segment of a compound selector matches, match is assumed.
 *
 * @param  ID_TEXT $c CSS file
 * @param  ?ID_TEXT $theme Theme (null: default)
 * @param  string $context (X) HTML context under which CSS is filtered
 * @return string Filtered CSS
 */
function filter_css(string $c, ?string $theme, string $context) : string