Several benefits of creating temporary files:

1. Delete them after use

2. There is no need to maintain the deletion status of this file

For example: I It is necessary to transfer the file contents of A to B and 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 resources type. The file is deleted when it is closed.

<?php
    //創(chuàng)建了一個臨時文件
    $handle = tmpfile();
 
    //向里面寫入了數(shù)據(jù)
    $numbytes = fwrite($handle, '寫入臨時文件');
 
    //關(guān)閉臨時文件，文件即被刪除
    fclose($handle);
 
    echo  '向臨時文件中寫入了'.$numbytes . '個字節(jié)';
?>