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php sys_get_temp_dir -返回临时文件路径

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Release: 2016-06-13 10:07:11
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好了费话不用说多了我们来看看这款php sys_get_temp_dir -返回临时文件路径函数使用方法与实现原理吧。

sys_get_temp_dir
( PHP 5中“ = 5.2.1 )

好了费话不用说多了我们来看看这款php sys_get_temp_dir -返回临时文件路径函数使用方法与实现原理吧。

sys_get_temp_dir -返回目录路径用于临时文件

描述
字符串sys_get_temp_dir (无效)
返回目录路径的PHP商店临时文件在默认情况下。

返回值
返回路径的临时目录中。

实例

例如# 1 sys_get_temp_dir ( )的例子

Examples

Example #1 sys_get_temp_dir() example

// Create a temporary file in the temporary
// files directory using sys_get_temp_dir()
$temp_file = tempnam(sys_get_temp_dir(), 'Tux');

echo $temp_file;
?>
The above example will output something similar to:

C:WindowsTempTuxA318.tmp

此函数的实现方法:

if ( !function_exists('sys_get_temp_dir')) {
  function sys_get_temp_dir() {
    if (!empty($_ENV['TMP'])) { return realpath($_ENV['TMP']); }
    if (!empty($_ENV['TMPDIR'])) { return realpath( $_ENV['TMPDIR']); }
    if (!empty($_ENV['TEMP'])) { return realpath( $_ENV['TEMP']); }
    $tempfile=tempnam(uniqid(rand(),TRUE),'');
    if (file_exists($tempfile)) {
    unlink($tempfile);
    return realpath(dirname($tempfile));
    }
  }
}
?>

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