php sys_get_temp_dir -返回临时文件路径
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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