php 追加内容到txt文件中

$filename="aa/a.txt";

$handle=fopen($filename,"w");

$str=fwrite($handle,"test");

fclose($handle);

$filename="aa/a.txt";

$handle=fopen($filename,"a+");

$str=fwrite($handle,"test\n");

fclose($handle);

逐行读取txt :

$lines=file("db.txt");
foreach ($lines as $value) {
$line=explode(",",$value);
echo "no1:$line[0]--no2:$line[1]---time:$line[2]-<br>";
}