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<?php
	$raw = array(
		array(
			'id' => '11', 
			'name' => 'n1',
			'music' => 'm1'),
		array(
			'id' => '12', 
			'name' => 'n2',
			'music' => 'm2'),
		array(
			'id' => '13', 
			'name' => 'n3',
			'music' => 'm3')
	);

	$data = array();

	foreach($raw as $item){
		$var = '$data['.$item["id"].']='.$item["name"].'-'.$item["music"];
		array_push($data, $var);
	}

	$str = implode('&', $data);
	print_r($str);
?>