The files we created before are permanent files.

Creating temporary files is also very useful in our daily project development. Several benefits of creating temporary files:

Delete after finishing writing

No need to maintain the deletion status of this file

For example: I need to transfer the content of A’s file Save it in B and transfer the file contents of B to C.

Just like in real life, I can first use a temporary bottle to fill B's water, and then write A's data into B. Add the water from the temporary bottle to C.

Let’s learn this function:

resource tmpfile ( )

Function: Create a temporary file and return the resource type. The file is deleted when it is closed.

<?php
   //創(chuàng)建了一個(gè)臨時(shí)文件
   $handle = tmpfile();

   //向里面寫(xiě)入了數(shù)據(jù)
   $numbytes = fwrite($handle, '寫(xiě)入臨時(shí)文件');

   //關(guān)閉臨時(shí)文件，文件即被刪除
   fclose($handle);

   echo  '向臨時(shí)文件中寫(xiě)入了'.$numbytes . '個(gè)字節(jié)';
?>