WP_CLI

Extractor::copy_overwrite_files │ public static │ WP-CLI 1.0

Copy files from source directory to destination directory. Source directory must exist.

Method of the class: Extractor{}

No Hooks.

Returns

null. Nothing (null).

Usage

$result = Extractor::copy_overwrite_files( $source, $dest );
$source(string) (required)
.
$dest(string) (required)
.

Extractor::copy_overwrite_files() code WP-CLI 2.13.0-alpha

wp-cli/php/WP_CLI/Extractor.php 
public static function copy_overwrite_files( $source, $dest ) {
	$iterator = new RecursiveIteratorIterator(
		new RecursiveDirectoryIterator(
			$source,
			RecursiveDirectoryIterator::SKIP_DOTS
		),
		RecursiveIteratorIterator::SELF_FIRST
	);

	$error = 0;

	if ( ! is_dir( $dest ) ) {
		mkdir( $dest, 0777, true );
	}

	foreach ( $iterator as $item ) {

		$dest_path = $dest . DIRECTORY_SEPARATOR . $iterator->getSubPathName();

		if ( $item->isDir() ) {
			if ( ! is_dir( $dest_path ) ) {
				mkdir( $dest_path );
			}
		} elseif ( file_exists( $dest_path ) && is_writable( $dest_path ) ) {
				copy( $item, $dest_path );
		} elseif ( ! file_exists( $dest_path ) ) {
			copy( $item, $dest_path );
		} else {
			$error = 1;
			WP_CLI::warning( "Unable to copy '" . $iterator->getSubPathName() . "' to current directory." );
		}
	}

	if ( $error ) {
		throw new Exception( 'There was an error overwriting existing files.' );
	}
}