Create temporary files

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
    //创建了一个临时文件
    $handle = tmpfile();
 
    //向里面写入了数据
    $numbytes = fwrite($handle, '写入临时文件');
 
    //关闭临时文件，文件即被删除
    fclose($handle);
 
    echo  '向临时文件中写入了'.$numbytes . '个字节';
?>