1 files changed, 93 insertions, 0 deletions
diff --git a/wp-admin/load-styles.php b/wp-admin/load-styles.php
new file mode 100644
index 0000000..fe4a4ee
--- /dev/null
+++ b/wp-admin/load-styles.php
@@ -0,0 +1,93 @@
+<?php
+
+/*
+ * Disable error reporting.
+ *
+ * Set this to error_reporting( -1 ) for debugging.
+ */
+error_reporting( 0 );
+
+// Set ABSPATH for execution.
+if ( ! defined( 'ABSPATH' ) ) {
+	define( 'ABSPATH', dirname( __DIR__ ) . '/' );
+}
+
+define( 'WPINC', 'wp-includes' );
+define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
+
+require ABSPATH . 'wp-admin/includes/noop.php';
+require ABSPATH . WPINC . '/theme.php';
+require ABSPATH . WPINC . '/class-wp-theme-json-resolver.php';
+require ABSPATH . WPINC . '/global-styles-and-settings.php';
+require ABSPATH . WPINC . '/script-loader.php';
+require ABSPATH . WPINC . '/version.php';
+
+$protocol = $_SERVER['SERVER_PROTOCOL'];
+if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0', 'HTTP/3' ), true ) ) {
+	$protocol = 'HTTP/1.0';
+}
+
+$load = $_GET['load'];
+if ( is_array( $load ) ) {
+	ksort( $load );
+	$load = implode( '', $load );
+}
+
+$load = preg_replace( '/[^a-z0-9,_-]+/i', '', $load );
+$load = array_unique( explode( ',', $load ) );
+
+if ( empty( $load ) ) {
+	header( "$protocol 400 Bad Request" );
+	exit;
+}
+
+$rtl            = ( isset( $_GET['dir'] ) && 'rtl' === $_GET['dir'] );
+$expires_offset = 31536000; // 1 year.
+$out            = '';
+
+$wp_styles = new WP_Styles();
+wp_default_styles( $wp_styles );
+
+if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) && stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ) === $wp_version ) {
+	header( "$protocol 304 Not Modified" );
+	exit;
+}
+
+foreach ( $load as $handle ) {
+	if ( ! array_key_exists( $handle, $wp_styles->registered ) ) {
+		continue;
+	}
+
+	$style = $wp_styles->registered[ $handle ];
+
+	if ( empty( $style->src ) ) {
+		continue;
+	}
+
+	$path = ABSPATH . $style->src;
+
+	if ( $rtl && ! empty( $style->extra['rtl'] ) ) {
+		// All default styles have fully independent RTL files.
+		$path = str_replace( '.min.css', '-rtl.min.css', $path );
+	}
+
+	$content = get_file( $path ) . "\n";
+
+	// Note: str_starts_with() is not used here, as wp-includes/compat.php is not loaded in this file.
+	if ( 0 === strpos( $style->src, '/' . WPINC . '/css/' ) ) {
+		$content = str_replace( '../images/', '../' . WPINC . '/images/', $content );
+		$content = str_replace( '../js/tinymce/', '../' . WPINC . '/js/tinymce/', $content );
+		$content = str_replace( '../fonts/', '../' . WPINC . '/fonts/', $content );
+		$out    .= $content;
+	} else {
+		$out .= str_replace( '../images/', 'images/', $content );
+	}
+}
+
+header( "Etag: $wp_version" );
+header( 'Content-Type: text/css; charset=UTF-8' );
+header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + $expires_offset ) . ' GMT' );
+header( "Cache-Control: public, max-age=$expires_offset" );
+
+echo $out;
+exit;