如何讲二维数组写入txt文件

$total = array(array("address","age"));
$total[$name] = ...

$arr = 你的数组;
$fn = '带保存的文件名';
foreach($arr as $name=>$row) {
  file_put_contents($fn, "$name,$row[address],$row[age]" . PHP_EOL, FILE_APPEND);
}