简单代码生成csv文件（excel）

$arr = array('');//  目标数组
header("Content-Type:application/vnd.ms-excel;charset=gbk");
header("Content-Disposition: attachment;filename='文件.csv'");

header('Cache-Control: max-age=0');
$fp = fopen('php://output', 'a');
$head = array('手机号', '姓名','职位', '公司');
foreach ($head as $i => $v) {
$head[$i] = iconv('utf-8', 'gbk', $v);
}
fputcsv($fp, $head);
foreach($arr as $vv){
$row = [$vv['phone'],$vv['username'],$vv['job'],($vv['company'])];
foreach ($row as $key => $val) {
$row[$key] = iconv('utf-8', 'gbk', $val);
}
fputcsv($fp, $row);
}
ob_flush();
flush();