Display posts matching a keyword within terms of a taxonomy within WordPress

gistfile1.php

<?php

	// Display posts matching a keyword within terms of a taxonomy
	// Keywords: tax_query, like, terms, search, WordPress

	$keyword = "Foo";
	$terms = get_terms("taxonomy", array("name__like" => esc_sql($keyword) ) );
	$new_terms = array();
	$tax_query = array();
									
	if( count($terms) > 0 ) {
	
		foreach($terms AS $term) {
			$new_terms[] = $term->slug;
		}
		
		$tax_query[] = array(
			'taxonomy' => 'taxonomy',
			'field' => 'slug',
			'terms' => $new_terms
		);
	} 
	
	// get the posts
	$posts = new WP_Query(
		array(
			"post_type" => "post",
			"tax_query" => $tax_query
		)
	);