View file File name : schema-presenter.php Content :<?php namespace Yoast\WP\SEO\Presenters; use WPSEO_Utils; /** * Presenter class for the schema object. */ class Schema_Presenter extends Abstract_Indexable_Presenter { /** * The tag key name. * * @var string */ protected $key = 'schema'; /** * Returns the schema output. * * @return string The schema tag. */ public function present() { $deprecated_data = [ '_deprecated' => 'Please use the "wpseo_schema_*" filters to extend the Yoast SEO schema data - see the WPSEO_Schema class.', ]; /** * Filter: 'wpseo_json_ld_output' - Allows disabling Yoast's schema output entirely. * * @param mixed $deprecated If false or an empty array is returned, disable our output. * @param string $empty */ $return = \apply_filters( 'wpseo_json_ld_output', $deprecated_data, '' ); if ( $return === [] || $return === false ) { return ''; } /** * Action: 'wpseo_json_ld' - Output Schema before the main schema from Yoast SEO is output. */ \do_action( 'wpseo_json_ld' ); $schema = $this->get(); if ( \is_array( $schema ) ) { $output = WPSEO_Utils::format_json_encode( $schema ); $output = \str_replace( "\n", \PHP_EOL . "\t", $output ); return '<script type="application/ld+json" class="yoast-schema-graph">' . $output . '</script>'; } return ''; } /** * Gets the raw value of a presentation. * * @return array The raw value. */ public function get() { return $this->presentation->schema; } }