Description:
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file_put_contents ( string $filename , mixed $data [, int $flags = 0 [, resource $context ]] ) : int

1. above is the function details

2. And when the params of `filename` in file_put_contents starts with data:// , php will execute it successful, but create a file.

Test script:
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<?php
echo file_put_contents('data://text/plain,cccc', 'data');


?>

Expected result:
----------------
4 ; and create a file names 'ccc'

Actual result:
--------------
4; and do not create any file.