php教程创建文件时存在文件自动重命名实现方法

<?php
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

<?php
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');

本文链接:http://www.phprm.com/code/37951.html

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