Display the names of all files that have been included using include, include_once, require or require_once.

display_included_files.php

<?php

if ( ! function_exists( 'display_included_files' ) ) {
	/**
	 * Display the names of all files that have been included using include, include_once, require or require_once.
	 *
	 * @param bool|array $filters   Array of strings to filter results. Ex: ['my-template', 'elementor'].
	 * @param bool $display         Display on screen or in javascript console. Default false.
	 */
	function display_included_files( $filters = false, $display = false ) {
		$files = get_included_files();
		if ( $filters && is_array( $filters ) ) {
			foreach ( $files as $key => $file ) {
				foreach ( $filters as $filter ) {
					if ( strstr( $file, $filter ) === false ) {
						unset( $files[ $key ] );
					}
				}
			}
		}
		if ( $display ) {
			$text = var_export( $files, true );
			$text = trim($text);
			$text = highlight_string( "INCLUDED FILES: \n" . "<?php " . $text, true);  // highlight_string() requires opening PHP tag or otherwise it will not colorize the text
			$text = trim($text);
			$text = preg_replace("|^\\<code\\>\\<span style\\=\"color\\: #[a-fA-F0-9]{0,6}\"\\>|", "", $text, 1);  // remove prefix
			$text = preg_replace("|\\</code\\>\$|", "", $text, 1);  // remove suffix 1
			$text = trim($text);  // remove line breaks
			$text = preg_replace("|\\</span\\>\$|", "", $text, 1);  // remove suffix 2
			$text = trim($text);  // remove line breaks
			$text = preg_replace("|^(\\<span style\\=\"color\\: #[a-fA-F0-9]{0,6}\"\\>)(&lt;\\?php&nbsp;)(.*?)(\\</span\\>)|", "\$1\$3\$4", $text);  // remove custom added "<?php "

			echo '<pre style="position: absolute;z-index: 9999999;bottom: 0;width: 100%;height: 50%; overflow: scroll;">';
			echo $text;
			echo '</pre>';
		} else {
			ob_start();
			$output = 'console.group("%c INCLUDED FILES: " + "%c", "color: #676e8a; font-size: 16px;","color: #a6accd; font-size: 16px;");';
			$output .= 'console.log(' . json_encode( $files ) . ');';
			$output .= 'console.groupEnd();';
			$output .= 'console.log("%c%s", "font-size: 20px;","\n");';
			$output = sprintf( '<script>%s</script>', $output );
			echo $output;
		}
	}
}