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php教程创建文件时存在文件自动重命名实现方法
function createfile($filename, $content = "")
{
$fp = file_put_contents($filename, $content);
}
// 要创建的文件名称
$filename = "www.txt";
if(file_exists($filename))
{
// 打开当前目录
$handle = opendir("./");
$fileinfo = pathinfo($filename);
//print_r($fileinfo);
$files = array();
while (false !== ($file = readdir($handle)))
{
if(preg_match_all("/{$fileinfo["filename"]}(d*).{$fileinfo["extension"]}/i", $file, $match))
{
$max = max($match[1]);
if($max)
{
$createfile = $fileinfo["filename"] . ($max + 1) . "." . $fileinfo["extension"];
}
else
{
$createfile = $fileinfo["filename"] . "1." . $fileinfo["extension"];
}
}
}
createfile($createfile);
}
else
{
createfile($filename);
}
?>
使用临时文件作记数器 方法二
function createfile($filename, $content = "")
{
if(file_exists($filename . ".tmp"))
{
$num = (int) file_get_contents($filename . ".tmp") + 1;
$fileinfo = pathinfo($filename);
file_put_contents($fileinfo["filename"] . "(" . $num . ")" .$fileinfo["extension"], $content);
file_put_contents($filename . ".tmp", $num);
}
else
{
file_put_contents($filename, $content);
file_put_contents($filename . ".tmp", 1);
}
}
createfile("test.txt");
?>