WP_CLI

Runner::extract_subdir_path │ private static │ WP-CLI 1.0

Attempts to find the path to the WP installation inside index.php

Method of the class: Runner{}

No Hooks.

Returns

String|false.

Usage

$result = Runner::extract_subdir_path( $index_path );
$index_path(string) (required)
.

Runner::extract_subdir_path() code WP-CLI 2.13.0-alpha

wp-cli/php/WP_CLI/Runner.php 
private static function extract_subdir_path( $index_path ) {
	$index_code = file_get_contents( $index_path );

	if ( ! preg_match( '|^\s*require\s*\(?\s*(.+?)/wp-blog-header\.php([\'"])|m', $index_code, $matches ) ) {
		return false;
	}

	$wp_path_src = $matches[1] . $matches[2];
	$wp_path_src = Utils\replace_path_consts( $wp_path_src, $index_path );

	$wp_path = eval( "return $wp_path_src;" ); // phpcs:ignore Squiz.PHP.Eval.Discouraged

	if ( ! Utils\is_path_absolute( $wp_path ) ) {
		$wp_path = dirname( $index_path ) . "/$wp_path";
	}

	return $wp_path;
}