WordPress at a glance
function is not described

WP_Styles::do_item() public WP 2.6.0

Processes a style dependency.

{} It's a method of the class: WP_Styles{}

Hooks from the method
Return

true/false. True on success, false on failure.

Usage

global $wp_styles;
$wp_styles->do_item( $handle, $group );
$handle(string) (required)
The style's registered handle.
$group(int/false)
Group level: level (int), no groups (false).
Default: false

Notes

  • See: WP_Dependencies::do_item()

Changelog

Since 2.6.0 Introduced.
Since 5.5.0 Added the $group parameter.

Code of WP_Styles::do_item() WP 5.5.1

<?php
public function do_item( $handle, $group = false ) {
	if ( ! parent::do_item( $handle ) ) {
		return false;
	}

	$obj = $this->registered[ $handle ];

	if ( null === $obj->ver ) {
		$ver = '';
	} else {
		$ver = $obj->ver ? $obj->ver : $this->default_version;
	}

	if ( isset( $this->args[ $handle ] ) ) {
		$ver = $ver ? $ver . '&amp;' . $this->args[ $handle ] : $this->args[ $handle ];
	}

	$src         = $obj->src;
	$cond_before = '';
	$cond_after  = '';
	$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';

	if ( $conditional ) {
		$cond_before = "<!--[if {$conditional}]>\n";
		$cond_after  = "<![endif]-->\n";
	}

	$inline_style = $this->print_inline_style( $handle, false );

	if ( $inline_style ) {
		$inline_style_tag = sprintf(
			"<style id='%s-inline-css'%s>\n%s\n</style>\n",
			esc_attr( $handle ),
			$this->type_attr,
			$inline_style
		);
	} else {
		$inline_style_tag = '';
	}

	if ( $this->do_concat ) {
		if ( $this->in_default_dir( $src ) && ! $conditional && ! isset( $obj->extra['alt'] ) ) {
			$this->concat         .= "$handle,";
			$this->concat_version .= "$handle$ver";

			$this->print_code .= $inline_style;

			return true;
		}
	}

	if ( isset( $obj->args ) ) {
		$media = esc_attr( $obj->args );
	} else {
		$media = 'all';
	}

	// A single item may alias a set of items, by having dependencies, but no source.
	if ( ! $src ) {
		if ( $inline_style_tag ) {
			if ( $this->do_concat ) {
				$this->print_html .= $inline_style_tag;
			} else {
				echo $inline_style_tag;
			}
		}

		return true;
	}

	$href = $this->_css_href( $src, $ver, $handle );
	if ( ! $href ) {
		return true;
	}

	$rel   = isset( $obj->extra['alt'] ) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
	$title = isset( $obj->extra['title'] ) ? sprintf( "title='%s'", esc_attr( $obj->extra['title'] ) ) : '';

	$tag = sprintf(
		"<link rel='%s' id='%s-css' %s href='%s'%s media='%s' />\n",
		$rel,
		$handle,
		$title,
		$href,
		$this->type_attr,
		$media
	);

	/**
	 * Filters the HTML link tag of an enqueued style.
	 *
	 * @since 2.6.0
	 * @since 4.3.0 Introduced the `$href` parameter.
	 * @since 4.5.0 Introduced the `$media` parameter.
	 *
	 * @param string $html   The link tag for the enqueued style.
	 * @param string $handle The style's registered handle.
	 * @param string $href   The stylesheet's source URL.
	 * @param string $media  The stylesheet's media attribute.
	 */
	$tag = apply_filters( 'style_loader_tag', $tag, $handle, $href, $media );

	if ( 'rtl' === $this->text_direction && isset( $obj->extra['rtl'] ) && $obj->extra['rtl'] ) {
		if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
			$suffix   = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
			$rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $src, $ver, "$handle-rtl" ) );
		} else {
			$rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
		}

		$rtl_tag = sprintf(
			"<link rel='%s' id='%s-rtl-css' %s href='%s'%s media='%s' />\n",
			$rel,
			$handle,
			$title,
			$rtl_href,
			$this->type_attr,
			$media
		);

		/** This filter is documented in wp-includes/class.wp-styles.php */
		$rtl_tag = apply_filters( 'style_loader_tag', $rtl_tag, $handle, $rtl_href, $media );

		if ( 'replace' === $obj->extra['rtl'] ) {
			$tag = $rtl_tag;
		} else {
			$tag .= $rtl_tag;
		}
	}

	if ( $this->do_concat ) {
		$this->print_html .= $cond_before;
		$this->print_html .= $tag;
		if ( $inline_style_tag ) {
			$this->print_html .= $inline_style_tag;
		}
		$this->print_html .= $cond_after;
	} else {
		echo $cond_before;
		echo $tag;
		$this->print_inline_style( $handle );
		echo $cond_after;
	}

	return true;
}