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File name : class-astra-customizer-sanitizes.php

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<?php
/**
 * Astra Theme Customizer Sanitize.
 *
 * @package     Astra
 * @author      Astra
 * @copyright   Copyright (c) 2020, Astra
 * @link        https://wpastra.com/
 * @since       Astra 1.0.0
 */

// No direct access, please.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Customizer Sanitizes
 *
 * @since 1.0.0
 */
if ( ! class_exists( 'Astra_Customizer_Sanitizes' ) ) {

/**
	 * Customizer Sanitizes Initial setup
	 */
	class Astra_Customizer_Sanitizes {

/**
		 * Instance
		 *
		 * @access private
		 * @var object
		 */
		private static $instance;

/**
		 * Initiator
		 */
		public static function get_instance() {
			if ( ! isset( self::$instance ) ) {
				self::$instance = new self();
			}
			return self::$instance;
		}

/**
		 * Constructor
		 */
		public function __construct() { }

/**
		 * Sanitize Logo SVG Icon.
		 *
		 * @param array $input Logo SVG Icon value.
		 * @return array Sanitized Logo SVG Icon value.
		 * @since 4.7.0
		 */
		public static function sanitize_logo_svg_icon( $input ) {
			if ( empty( $input['type'] ) ) {
				return array(
					'type'  => '',
					'value' => '',
				);
			}

if ( 'icon-library' === $input['type'] ) {

$svg_icons = function_exists( 'astra_get_logo_svg_icons_array' ) ? astra_get_logo_svg_icons_array() : array();

return array(
					'type'  => 'icon-library',
					'value' => isset( $input['value'] ) && isset( $svg_icons[ $input['value'] ] ) ? $input['value'] : '',
				);
			}

return array(
				'type'  => 'custom',
				'value' => isset( $input['value'] ) ? self::sanitize_svg_code( $input['value'] ) : '',
			);
		}

/**
		 * Sanitizes SVG Code string.
		 *
		 * @param string $original_content SVG code to sanitize.
		 * @return string
		 * @since 4.7.0
		 */
		public static function sanitize_svg_code( $original_content ) {

if ( ! $original_content ) {
				return '';
			}

// Define allowed tags and attributes.
			$allowed_tags = apply_filters( 'astra_custom_svg_allowed_tags', array( 'a', 'circle', 'clippath', 'defs', 'style', 'desc', 'ellipse', 'fegaussianblur', 'filter', 'foreignobject', 'g', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'svg', 'switch', 'symbol', 'text', 'textpath', 'title', 'tspan', 'use' ) );

$allowed_attributes = apply_filters( 'astra_custom_svg_allowed_attributes', array( 'class', 'clip-path', 'clip-rule', 'fill-opacity', 'fill-rule', 'filter', 'id', 'mask', 'opacity', 'stroke', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'style', 'systemlanguage', 'transform', 'href', 'xlink:href', 'xlink:title', 'cx', 'cy', 'r', 'requiredfeatures', 'clippathunits', 'type', 'rx', 'ry', 'color-interpolation-filters', 'stddeviation', 'filterres', 'filterunits', 'primitiveunits', 'x', 'y', 'font-size', 'display', 'font-family', 'font-style', 'font-weight', 'text-anchor', 'marker-end', 'marker-mid', 'marker-start', 'x1', 'x2', 'y1', 'y2', 'gradienttransform', 'gradientunits', 'spreadmethod', 'markerheight', 'markerunits', 'markerwidth', 'orient', 'preserveaspectratio', 'refx', 'refy', 'maskcontentunits', 'maskunits', 'd', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'fx', 'fy', 'offset', 'stop-color', 'stop-opacity', 'xmlns', 'xmlns:se', 'xmlns:xlink', 'xml:space', 'method', 'spacing', 'startoffset', 'dx', 'dy', 'rotate', 'textlength', 'viewbox' ) );

$is_encoded = false;

$needle = "\x1f\x8b\x08";
			if ( function_exists( 'mb_strpos' ) ) {
				$is_encoded = 0 === mb_strpos( $original_content, $needle );
			} else {
				$is_encoded = 0 === strpos( $original_content, $needle );
			}

if ( $is_encoded ) {
				$original_content = gzdecode( $original_content );
				if ( $original_content === false ) {
					return '';
				}
			}

// Strip php tags.
			$content = preg_replace( '/<\?(=|php)(.+?)\?>/i', '', $original_content );
			$content = preg_replace( '/<\?(.*)\?>/Us', '', $content );
			$content = preg_replace( '/<\%(.*)\%>/Us', '', $content );

if ( ( false !== strpos( $content, '<?php' ) ) || ( false !== strpos( $content, '<%' ) ) ) {
				return '';
			}

// Strip comments.
			$content = preg_replace( '//Us', '', $content );
			$content = preg_replace( '/\/\*(.*)\*\//Us', '', $content );

if ( ( false !== strpos( $content, '<!--' ) ) || ( false !== strpos( $content, '/*' ) ) ) {
				return '';
			}

// Strip line breaks.
			$content = preg_replace( '/\r|\n/', '', $content );

// Find the start and end tags so we can cut out miscellaneous garbage.
			$start = strpos( $content, '<svg' );
			$end   = strrpos( $content, '</svg>' );
			if ( false === $start || false === $end ) {
				return '';
			}

$content = substr( $content, $start, ( $end - $start + 6 ) );

// If the server's PHP version is 8 or up, make sure to disable the ability to load external entities.
			$php_version_under_eight = version_compare( PHP_VERSION, '8.0.0', '<' );
			if ( $php_version_under_eight ) {
				$libxml_disable_entity_loader = libxml_disable_entity_loader( true );
			}
			// Suppress the errors.
			$libxml_use_internal_errors = libxml_use_internal_errors( true );

// Create DOMDocument instance.
			$dom                      = new DOMDocument();
			$dom->formatOutput        = false;
			$dom->preserveWhiteSpace  = false;
			$dom->strictErrorChecking = false;

$open_svg = (bool) $content ? $dom->loadXML( $content ) : false;
			if ( ! $open_svg ) {
				return '';
			}

// Strip Doctype.
			foreach ( $dom->childNodes as $child ) {
				if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType && (bool) $child->parentNode ) {
					$child->parentNode->removeChild( $child );
				}
			}

// Sanitize elements.
			$elements = $dom->getElementsByTagName( '*' );
			for ( $index = $elements->length - 1; $index >= 0; $index-- ) {
				$current_element = $elements->item( $index );
				if ( ! in_array( strtolower( $current_element->tagName ), $allowed_tags ) ) {
					$current_element->parentNode->removeChild( $current_element );
					continue;
				}

// Validate allowed attributes.
				for ( $i = $current_element->attributes->length - 1; $i >= 0; $i-- ) {
					$attr_name           = $current_element->attributes->item( $i )->name;
					$attr_name_lowercase = strtolower( $attr_name );
					if ( ! in_array( $attr_name_lowercase, $allowed_attributes ) &&
						! preg_match( '/^aria-/', $attr_name_lowercase ) &&
						! preg_match( '/^data-/', $attr_name_lowercase ) ) {
						$current_element->removeAttribute( $attr_name );
						continue;
					}

$attr_value = $current_element->attributes->item( $i )->value;
					if ( ! empty( $attr_value ) &&
						( preg_match( '/^((https?|ftp|file):)?\/\//i', $attr_value ) ||
						preg_match( '/base64|data|(?:java)?script|alert\(|window\.|document/i', $attr_value ) ) ) {
						$current_element->removeAttribute( $attr_name );
						continue;
					}
				}

// Strip xlink:href.
				$xlink_href = $current_element->getAttributeNS( 'http://www.w3.org/1999/xlink', 'href' );
				if ( $xlink_href && strpos( $xlink_href, '#' ) !== 0 ) {
					$current_element->removeAttributeNS( 'http://www.w3.org/1999/xlink', 'href' );
				}

// Strip use tag with external references.
				if ( strtolower( $current_element->tagName ) === 'use' ) {
					$xlink_href = $current_element->getAttributeNS( 'http://www.w3.org/1999/xlink', 'href' );
					if ( $current_element->parentNode && $xlink_href && strpos( $xlink_href, '#' ) !== 0 ) {
						$current_element->parentNode->removeChild( $current_element );
					}
				}
			}

// Export sanitized SVG to string.
			$sanitized = $dom->saveXML( $dom->documentElement, LIBXML_NOEMPTYTAG );

// Restore defaults.
			if ( $php_version_under_eight && isset( $libxml_disable_entity_loader ) ) {
				libxml_disable_entity_loader( $libxml_disable_entity_loader );
			}
			libxml_use_internal_errors( $libxml_use_internal_errors );

return $sanitized;
		}

/**
		 * Sanitize Integer
		 *
		 * @param  number $input Customizer setting input number.
		 * @return number        Absolute number.
		 */
		public static function sanitize_integer( $input ) {
			return absint( $input );
		}

/**
		 * Sanitize Integer
		 *
		 * @param  number $val      Customizer setting input number.
		 * @param  object $setting  Setting object.
		 * @return number           Return number.
		 */
		public static function sanitize_number( $val, $setting ) {

$input_attrs = array();

if ( isset( $setting->manager->get_control( $setting->id )->input_attrs ) ) {
				$input_attrs = $setting->manager->get_control( $setting->id )->input_attrs;
			}

if ( isset( $input_attrs ) ) {

$input_attrs['min']  = isset( $input_attrs['min'] ) ? $input_attrs['min'] : 0;
				$input_attrs['step'] = isset( $input_attrs['step'] ) ? $input_attrs['step'] : 1;

if ( isset( $input_attrs['max'] ) && $val > $input_attrs['max'] ) {
					$val = $input_attrs['max'];
				} elseif ( $val < $input_attrs['min'] ) {
					$val = $input_attrs['min'];
				}

/** @psalm-suppress InvalidCast */ // phpcs:ignore Generic.Commenting.DocComment.MissingShort
				$dv = (float) $val / $input_attrs['step'];
				/** @psalm-suppress InvalidCast */ // phpcs:ignore Generic.Commenting.DocComment.MissingShort

$dv = round( $dv );

$val = $dv * $input_attrs['step'];

$val = number_format( (float) $val, 2, '.', '' );
				if ( $val == (int) $val ) {
					$val = (int) $val;
				}
			}

return is_numeric( $val ) ? $val : 0;
		}

/**
		 * Sanitize Integer
		 *
		 * @param  number $val Customizer setting input number.
		 * @return number        Return number.
		 */
		public static function sanitize_number_n_blank( $val ) {
			return is_numeric( $val ) ? $val : '';
		}

/**
		 * Sanitize Spacing
		 *
		 * @param  number $val Customizer setting input number.
		 * @return number        Return number.
		 * @since  1.0.6
		 */
		public static function sanitize_spacing( $val ) {

foreach ( $val as $key => $value ) {
				$val[ $key ] = ( is_numeric( $val[ $key ] ) && $val[ $key ] >= 0 ) ? $val[ $key ] : '';
			}

return $val;
		}

/**
		 * Sanitize link
		 *
		 * @param  array $val Customizer setting link.
		 * @return array        Return array.
		 * @since  2.3.0
		 */
		public static function sanitize_link( $val ) {

$link = array();

$link['url']      = esc_url_raw( $val['url'] );
			$link['new_tab']  = esc_attr( $val['new_tab'] );
			$link['link_rel'] = esc_attr( $val['link_rel'] );

return $link;
		}

/**
		 * Sanitize responsive  Spacing
		 *
		 * @param  number $val Customizer setting input number.
		 * @return number        Return number.
		 * @since  1.2.1
		 */
		public static function sanitize_responsive_spacing( $val ) {

$spacing = array(
				'desktop'      => array(
					'top'    => '',
					'right'  => '',
					'bottom' => '',
					'left'   => '',
				),
				'tablet'       => array(
					'top'    => '',
					'right'  => '',
					'bottom' => '',
					'left'   => '',
				),
				'mobile'       => array(
					'top'    => '',
					'right'  => '',
					'bottom' => '',
					'left'   => '',
				),
				'desktop-unit' => 'px',
				'tablet-unit'  => 'px',
				'mobile-unit'  => 'px',
			);

if ( isset( $val['desktop'] ) ) {
				$spacing['desktop'] = array_map( 'self::check_numberic_values', $val['desktop'] );

$spacing['tablet'] = array_map( 'self::check_numberic_values', $val['tablet'] );

$spacing['mobile'] = array_map( 'self::check_numberic_values', $val['mobile'] );

if ( isset( $val['desktop-unit'] ) ) {
					$spacing['desktop-unit'] = $val['desktop-unit'];
				}

if ( isset( $val['tablet-unit'] ) ) {
					$spacing['tablet-unit'] = $val['tablet-unit'];
				}

if ( isset( $val['mobile-unit'] ) ) {
					$spacing['mobile-unit'] = $val['mobile-unit'];
				}

return $spacing;

} else {
				/** @psalm-suppress DocblockTypeContradiction */
				if ( is_array( $val ) ) {
					foreach ( $val as $key => $value ) {
						$val[ $key ] = is_numeric( $val[ $key ] ) ? $val[ $key ] : '';
					}
				}
				/** @psalm-suppress InvalidReturnStatement */
				return $val;
			}

}

/**
		 * Check numeric values.
		 *
		 * @param  int|string $value Value of variable.
		 * @return string|int Return empty if $value is not integer.
		 *
		 * @since 2.5.4
		 */
		public static function check_numberic_values( $value ) {
			return ( is_numeric( $value ) ) ? $value : '';
		}

/**
		 * Sanitize Responsive Slider
		 *
		 * @param  array|number $val Customizer setting input number.
		 * @param  object       $setting Setting Onject.
		 * @return array        Return number.
		 */
		public static function sanitize_responsive_slider( $val, $setting ) {

$input_attrs = array();
			if ( isset( $setting->manager->get_control( $setting->id )->input_attrs ) ) {
				$input_attrs = $setting->manager->get_control( $setting->id )->input_attrs;
			}

$responsive = array(
				'desktop' => '',
				'tablet'  => '',
				'mobile'  => '',
			);
			if ( is_array( $val ) ) {
				$responsive['desktop'] = is_numeric( $val['desktop'] ) ? $val['desktop'] : '';
				$responsive['tablet']  = is_numeric( $val['tablet'] ) ? $val['tablet'] : '';
				$responsive['mobile']  = is_numeric( $val['mobile'] ) ? $val['mobile'] : '';
			} else {
				$responsive['desktop'] = is_numeric( $val ) ? $val : '';
			}

foreach ( $responsive as $key => $value ) {
					$value              = isset( $input_attrs['min'] ) && ( ! empty( $value ) ) && ( $input_attrs['min'] > $value ) ? $input_attrs['min'] : $value;
					$value              = isset( $input_attrs['max'] ) && ( ! empty( $value ) ) && ( $input_attrs['max'] < $value ) ? $input_attrs['max'] : $value;
					$responsive[ $key ] = $value;
			}

return $responsive;
		}

/**
		 * Sanitize Responsive Typography
		 *
		 * @param  array|number $val Customizer setting input number.
		 * @return array        Return number.
		 */
		public static function sanitize_responsive_typo( $val ) {

$responsive = array(
				'desktop'      => '',
				'tablet'       => '',
				'mobile'       => '',
				'desktop-unit' => '',
				'tablet-unit'  => '',
				'mobile-unit'  => '',
			);
			if ( is_array( $val ) ) {
				$responsive['desktop']      = ( isset( $val['desktop'] ) && is_numeric( $val['desktop'] ) ) ? $val['desktop'] : '';
				$responsive['tablet']       = ( isset( $val['tablet'] ) && is_numeric( $val['tablet'] ) ) ? $val['tablet'] : '';
				$responsive['mobile']       = ( isset( $val['mobile'] ) && is_numeric( $val['mobile'] ) ) ? $val['mobile'] : '';
				$responsive['desktop-unit'] = ( isset( $val['desktop-unit'] ) && in_array( $val['desktop-unit'], array( '', 'px', 'em', 'rem', '%' ) ) ) ? $val['desktop-unit'] : 'px';
				$responsive['tablet-unit']  = ( isset( $val['tablet-unit'] ) && in_array( $val['tablet-unit'], array( '', 'px', 'em', 'rem', '%' ) ) ) ? $val['tablet-unit'] : 'px';
				$responsive['mobile-unit']  = ( isset( $val['mobile-unit'] ) && in_array( $val['mobile-unit'], array( '', 'px', 'em', 'rem', '%' ) ) ) ? $val['mobile-unit'] : 'px';
			} else {
				$responsive['desktop'] = is_numeric( $val ) ? $val : '';
			}
			return $responsive;
		}

/**
		 * Validate Email
		 *
		 * @param  object $validity setting input validity.
		 * @param  string $value    setting input value.
		 * @return object           Return the validity object.
		 */
		public static function validate_email( $validity, $value ) {
			if ( ! is_email( $value ) ) {
				$validity->add( 'required', __( 'Enter valid email address!', 'astra' ) );
			}
			return $validity;
		}

/**
		 * Validate Sidebar Content Width
		 *
		 * @param  number $value Sidebar content width.
		 * @return number        Sidebar content width value.
		 */
		public static function validate_sidebar_content_width( $value ) {
			$value = intval( $value );
			if ( $value > 50 ) {
				$value = 50;
			} elseif ( $value < 15 ) {
				$value = 15;
			}
			return $value;
		}

/**
		 * Validate Site width
		 *
		 * @param  number $value Site width.
		 * @return number        Site width value.
		 */
		public static function validate_site_width( $value ) {
			$value = intval( $value );
			if ( 1920 < $value ) {
				$value = 1920;
			} elseif ( 768 > $value ) {
				$value = 768;
			}
			return $value;
		}

/**
		 * Validate Site padding
		 *
		 * @param  number $value Site padding.
		 * @return number        Site padding value.
		 */
		public static function validate_site_padding( $value ) {
			$value = intval( $value );
			if ( 200 < $value ) {
				$value = 200;
			} elseif ( 1 > $value ) {
				$value = 1;
			}
			return $value;
		}

/**
		 * Validate Site margin
		 *
		 * @param  number $value Site margin.
		 * @return number        Site margin value.
		 */
		public static function validate_site_margin( $value ) {
			$value = intval( $value );
			if ( 600 < $value ) {
				$value = 600;
			} elseif ( 0 > $value ) {
				$value = 0;
			}
			return $value;
		}

/**
		 * Sanitize checkbox
		 *
		 * @param  mixed $input setting input.
		 * @return number        setting input value.
		 */
		public static function sanitize_checkbox( $input ) {
			if ( $input ) {
				$output = '1';
			} else {
				$output = false;
			}
			return $output;
		}

/**
		 * Sanitize HEX color
		 *
		 * @param  string $color setting input.
		 * @return string        setting input value.
		 */
		public static function sanitize_hex_color( $color ) {

if ( '' === $color ) {
				return '';
			}

// 3 or 6 hex digits, or the empty string.
			if ( preg_match( '|^#([A-Fa-f0-9]{3}){1,2}$|', $color ) ) {
				return $color;
			}

return '';
		}

/**
		 * Sanitize Alpha color
		 *
		 * @param  string $color setting input.
		 * @return string        setting input value.
		 */
		public static function sanitize_alpha_color( $color ) {

if ( '' === $color ) {
				return '';
			}

// CSS variable value sanitize.
			if ( 0 === strpos( $color, 'var(--' ) ) {
				return preg_replace( '/[^A-Za-z0-9_)(\-,.]/', '', $color );
			}

if ( false === strpos( $color, 'rgba' ) ) {
				/* Hex sanitize */
				return self::sanitize_hex_color( $color );
			}

/* rgba sanitize */
			$color = str_replace( ' ', '', $color );
			sscanf( $color, 'rgba(%d,%d,%d,%f)', $red, $green, $blue, $alpha );
			return 'rgba(' . $red . ',' . $green . ',' . $blue . ',' . $alpha . ')';
		}

/**
		 * Sanitize html
		 *
		 * @param  string $input    setting input.
		 * @return mixed            setting input value.
		 */
		public static function sanitize_html( $input ) {
			return wp_kses_post( $input );
		}

/**
		 * Sanitize Select choices
		 *
		 * @param  string $input    setting input.
		 * @param  object $setting  setting object.
		 * @return mixed            setting input value.
		 */
		public static function sanitize_multi_choices( $input, $setting ) {

// Get list of choices from the control
			// associated with the setting.
			$choices    = $setting->manager->get_control( $setting->id )->choices;
			$input_keys = $input;

foreach ( $input_keys as $key => $value ) {
				if ( ! array_key_exists( $value, $choices ) ) {
					unset( $input[ $key ] );
				}
			}

// If the input is a valid key, return it;
			// otherwise, return the default.
			return ( is_array( $input ) ? $input : $setting->default );
		}

// Ensure input is a slug.
			$input = sanitize_key( $input );

// Get list of choices from the control
			// associated with the setting.
			$choices = $setting->manager->get_control( $setting->id )->choices;

// If the input is a valid key, return it;
			// otherwise, return the default.
			return ( array_key_exists( $input, $choices ) ? $input : $setting->default );
		}

/**
		 * Sanitize Font weight
		 *
		 * @param  mixed $input setting input.
		 * @return mixed        setting input value.
		 */
		public static function sanitize_font_weight( $input ) {

$valid = array(
				'inherit',
				'normal',
				'bold',
				'100',
				'200',
				'300',
				'400',
				'500',
				'600',
				'700',
				'800',
				'900',
			);

if ( in_array( $input, $valid ) ) {
				return $input;
			} else {
				return 'normal';
			}
		}

/**
		 * Sanitize Font variant
		 *
		 * @param  mixed $input setting input.
		 * @return mixed        setting input value.
		 */
		public static function sanitize_font_variant( $input ) {

if ( is_array( $input ) ) {
				$input = implode( ',', $input );
			}
			return sanitize_text_field( $input );
		}

/**
		 * Sanitize Background Obj
		 *
		 * @param  mixed $bg_obj setting input.
		 * @return array        setting input value.
		 */
		public static function sanitize_background_obj( $bg_obj ) {

$out_bg_obj = array(
				'background-color'      => '',
				'background-image'      => '',
				'background-repeat'     => 'repeat',
				'background-position'   => 'center center',
				'background-size'       => 'auto',
				'background-attachment' => 'scroll',
				'overlay-type'          => '',
				'overlay-color'         => '',
				'overlay-opacity'       => '',
				'overlay-gradient'      => '',
				'background-media'      => '',
				'background-type'       => '',
			);

if ( is_array( $bg_obj ) ) {

foreach ( $out_bg_obj as $key => $value ) {

if ( isset( $bg_obj[ $key ] ) ) {

if ( 'background-image' === $key ) {
							$out_bg_obj[ $key ] = esc_url_raw( $bg_obj[ $key ] );
						} else {
							$out_bg_obj[ $key ] = esc_attr( $bg_obj[ $key ] );
						}
					}
				}
			}

return $out_bg_obj;
		}

/**
		 * Sanitize Border Typography
		 *
		 * @since 1.4.0
		 * @param  array|number $val Customizer setting input number.
		 * @return array        Return number.
		 */
		public static function sanitize_border( $val ) {

$border = array(
				'top'    => '',
				'right'  => '',
				'bottom' => '',
				'left'   => '',
			);
			/** @psalm-suppress DocblockTypeContradiction */ // phpcs:ignore Generic.Commenting.DocComment.MissingShort
			if ( is_array( $val ) ) {
				$border['top']    = is_numeric( $val['top'] ) ? $val['top'] : '';
				$border['right']  = is_numeric( $val['right'] ) ? $val['right'] : '';
				$border['bottom'] = is_numeric( $val['bottom'] ) ? $val['bottom'] : '';
				$border['left']   = is_numeric( $val['left'] ) ? $val['left'] : '';
			}
			return $border;
		}

/**
		 * Sanitize Customizer Link param.
		 *
		 * @param Array $val array(
		 *      linked : Linked Customizer Section,
		 *      link_text : Link Text.
		 * ).
		 *
		 * @since 1.6.0
		 *
		 * @return Array
		 */
		public static function sanitize_customizer_links( $val ) {
			$val['linked']         = sanitize_text_field( $val['linked'] );
			$val['link_text']      = esc_html( $val['link_text'] );
			$val['link_type']      = esc_html( $val['link_type'] );
			$val['is_button_link'] = esc_html( isset( $val['is_button_link'] ) ? $val['is_button_link'] : '#' );
			return $val;
		}

/**
		 * Sanitize Responsive Background Image
		 *
		 * @param  array $bg_obj Background object.
		 * @return array         Background object.
		 */
		public static function sanitize_responsive_background( $bg_obj ) {

// Default Responsive Background Image.
			$defaults = array(
				'desktop' => array(
					'background-color'      => '',
					'background-image'      => '',
					'background-repeat'     => 'repeat',
					'background-position'   => 'center center',
					'background-size'       => 'auto',
					'background-attachment' => 'scroll',
					'overlay-type'          => '',
					'overlay-color'         => '',
					'overlay-opacity'       => '',
					'overlay-gradient'      => '',
					'background-media'      => '',
					'background-type'       => '',
				),
				'tablet'  => array(
					'background-color'      => '',
					'background-image'      => '',
					'background-repeat'     => 'repeat',
					'background-position'   => 'center center',
					'background-size'       => 'auto',
					'background-attachment' => 'scroll',
					'overlay-type'          => '',
					'overlay-color'         => '',
					'overlay-opacity'       => '',
					'overlay-gradient'      => '',
					'background-media'      => '',
					'background-type'       => '',
				),
				'mobile'  => array(
					'background-color'      => '',
					'background-image'      => '',
					'background-repeat'     => 'repeat',
					'background-position'   => 'center center',
					'background-size'       => 'auto',
					'background-attachment' => 'scroll',
					'overlay-type'          => '',
					'overlay-color'         => '',
					'overlay-opacity'       => '',
					'overlay-gradient'      => '',
					'background-media'      => '',
					'background-type'       => '',
				),
			);

// Merge responsive background object and default object into $out_bg_obj array.
			$out_bg_obj = wp_parse_args( $bg_obj, $defaults );

foreach ( $out_bg_obj as $device => $bg ) {
				foreach ( $bg as $key => $value ) {
					if ( 'background-image' === $key ) {
						$out_bg_obj[ $device ] [ $key ] = esc_url_raw( $value );
					}
					if ( 'background-media' === $key ) {
						$out_bg_obj[ $device ] [ $key ] = floatval( $value );
					} else {
						$out_bg_obj[ $device ] [ $key ] = esc_attr( $value );
					}
				}
			}
			return $out_bg_obj;
		}

/**
		 * Sanitize Toggle Control param.
		 *
		 * @param bool $val for True|False.
		 *
		 * @since 3.1.0
		 *
		 * @return bool True|False
		 */
		public static function sanitize_toggle_control( $val ) {
			// returns true if checkbox is checked.
			return ( isset( $val ) && is_bool( $val ) ? $val : '' );
		}
	}
}

/**
 * Kicking this off by calling 'get_instance()' method
 */
Astra_Customizer_Sanitizes::get_instance();

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