Definition and Usage
定义和用法

The tmpfile() function creates a temporary file with a unique name in read-write (w+) mode.
tmpfile()函数的作用是：在“read-write(w+)”模式下建立一个临时文件/建立一个具有唯一文件名的文件。

Syntax
语法

tmpfile()

Tips and Notes
提示和注意点

Note: The temporary file is automatically removed when it is closed with fclose(), or when the script ends.
注意：当fclose()函数被关闭或脚本程序结束时，这个临时文件夹将被关闭。

Tip: See also tempnam()
提示：可以回顾一下tempnam()

Example
案例

<?php
$temp = tmpfile();

fwrite($temp, "Testing, testing.");
//Rewind to the start of file
rewind($temp);
//Read 1k from file
echo fread($temp,1024);

//This removes the file
fclose($temp);
?> 

The output of the code above will be:
上述代码将输出下面的结果：

Testing, testing.

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