如何使用file_put_contents（）将数据附加到文件？

Question

I have an android app that sends multiple data from okhttp3 but i can't find a way to log all the data sent in php..My current log only houses the last record(Show below). My best guess is that the php file data is being overwritten until the last record..How can I log all the data sent? And yes all the data is being sent out from the android app...

index.php

if (isset($_POST))
 {
file_put_contents("post.log",print_r($_POST,true));
}

Sample post.log

 Array
(
    [date] =>  02 Aug, 12:22
    [company] => Assert Ventures
    [lattitude] => 32.8937542
    [longitude] => -108.336584
    [user_id] => Malboro
    [photo_id] => 1
)

What I want

(
   [date] =>  02 Aug, 12:22
   [company] => Three Ventures
   [lattitude] => 302.8937542
   [longitude] => -55.336584
   [user_id] => Malboro
   [photo_id] => 1
),
(
   [date] =>  02 Aug, 12:22
   [company] => Two Ventures
   [lattitude] => 153.8937542
   [longitude] => -88.336584
   [user_id] => Malboro
   [photo_id] => 1
),
(
    [date] =>  02 Aug, 12:22
    [company] => Assert Ventures
    [lattitude] => 32.8937542
    [longitude] => -108.336584
    [user_id] => Malboro
    [photo_id] => 1
)

Answer 1

You need to pass third parameter FILE_APPEND;

So your PHP code will look something like this,

if (isset($_POST))
 {
file_put_contents("post.log",print_r($_POST,true),FILE_APPEND);
}

FILE_APPEND flag helps to append the content to the end of the file instead of overriding the content.