Viên ngọc phương Đông

<?php

/**
 * Get the attachment src, but also have the option of getting the fallback URL.
 *
 * @param bool|false $fallback
 *
 * @return array|bool|false
 */
function siteorigin_widgets_get_attachment_image_src( $attachment, $size, $fallback = false, $fallback_size = array() ) {
	if ( empty( $attachment ) && ! empty( $fallback ) ) {
		if ( ! empty( $fallback_size ) ) {
			extract( $fallback_size );
		} else {
			$url = parse_url( $fallback );

if (
				! empty( $url['fragment'] ) &&
				preg_match(
					'/^([0-9]+)x([0-9]+)$/',
					$url['fragment'],
					$matches
				) ) {
				$width = (int) $matches[1];
				$height = (int) $matches[2];
			} else {
				$width = 0;
				$height = 0;
			}
		}

// TODO, try get better values than 0 for width and height
		return array( $fallback, $width, $height, false );
	}

if ( ! empty( $attachment ) ) {
		return wp_get_attachment_image_src( $attachment, $size );
	}

return false;
}

function siteorigin_widgets_get_attachment_image( $attachment, $size, $fallback, $atts = array() ) {
	if ( ! empty( $attachment ) ) {
		return wp_get_attachment_image( $attachment, $size, false, $atts );
	} else {
		$src = siteorigin_widgets_get_attachment_image_src( $attachment, $size, $fallback );

if ( empty( $src[0] ) ) {
			return '';
		}

if ( function_exists( 'wp_get_attachment_image_srcset' ) ) {
			$atts['srcset'] = wp_get_attachment_image_srcset( $attachment, $size );
		}

if ( function_exists( 'wp_get_attachment_image_sizes' ) ) {
			$atts['sizes'] = wp_get_attachment_image_sizes( $attachment, $size );
		}

$atts['src'] = $src[0];

if ( ! empty( $src[1] ) ) {
			$atts['width'] = $src[1];
		}

if ( ! empty( $src[2] ) ) {
			$atts['height'] = $src[2];
		}

$return = '<img ';

foreach ( $atts as $id => $val ) {
			$return .= $id . '="' . esc_attr( $val ) . '" ';
		}
		$return .= '>';

return $return;
	}
}

/**
 * Get size information for all currently-registered image sizes.
 * From codex example here: https://codex.wordpress.org/Function_Reference/get_intermediate_image_sizes
 *
 * @global $_wp_additional_image_sizes
 *
 * @uses   get_intermediate_image_sizes()
 *
 * @return array $sizes Data for all currently-registered image sizes.
 */
function siteorigin_widgets_get_image_sizes() {
	global $_wp_additional_image_sizes;

$sizes = array();

foreach ( get_intermediate_image_sizes() as $_size ) {
		if ( in_array( $_size, array( 'thumbnail', 'medium', 'medium_large', 'large' ) ) ) {
			$sizes[ $_size ]['width'] = get_option( "{$_size}_size_w" );
			$sizes[ $_size ]['height'] = get_option( "{$_size}_size_h" );
			$sizes[ $_size ]['crop'] = (bool) get_option( "{$_size}_crop" );
		} elseif ( isset( $_wp_additional_image_sizes[ $_size ] ) ) {
			$sizes[ $_size ] = array(
				'width'  => $_wp_additional_image_sizes[ $_size ]['width'],
				'height' => $_wp_additional_image_sizes[ $_size ]['height'],
				'crop'   => $_wp_additional_image_sizes[ $_size ]['crop'],
			);
		}
	}

return $sizes;
}

/**
 * @return mixed
 */
function siteorigin_widgets_get_image_size( $size ) {
	$sizes = siteorigin_widgets_get_image_sizes();

if ( ! empty( $sizes[ $size ] ) ) {
		return $sizes[ $size ];
	}

return null;
}