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PHP touch()函数

touch() 函数可以设置指定文件的访问和修改时间，成功返回 true，失败返回 false。

语法

bool touch ( string filename [, inttime = time() [, int $atime ]] )

此函数可以尝试将文件名在filename参数中命名的文件的访问时间和修改时间设置为给定值time。请注意，无论参数的数量如何，访问时间总是会被修改。

示例1

<?php
   filename = "/PhpProject/sample.txt";
   if(touch(filename)) {
      echo filename . " modification time has been changed to present time";
   } else {
      echo "Sorry, could not change modification time of " .filename;
   }
?>

输出

/PhpProject/sample.txt modification time has been changed to present time

示例2

<?php
   time = time() - 3600;
   if (!touch("/PhpProject/sample.txt",time)) {
      echo "oops, something went wrong...";
   } else {
      echo "Touched file with success";
   }
?>