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PHP操作文件的一些基本函数使用示例_PHP

May 31, 2016 pm 07:27 PM
php function

在对文件进行操作时,不仅可以对文件中的数据进行操作,还可以对文件本身进行操作。例如复制文件、删除文件、截取文件及为文件重命名等操作。在PHP中已经提供了这些文件处理方式的标准函数,使用也非常容易,如下表所示:

在表中,四个函数如果执行成功,则都会返回TRUE,失败则返回FALSE。它们的使用代码如下所示:

代码如下:


//复制文件示例
if(copy('./file1.txt','../data/file2.txt')){
echo "文件复制成功!";
}else{
echo "文件复制失败!";
}
 
//删除文件示例
$filename = "file.txt";
if (file_exists($filename)){
if (unlink($filename)){
echo "文件删除成功!";
}else{
echo "文件删除失败!";
}
}else{
echo "目标文件不存在";
}
 
//重命名文件示例
if (rename('./demo.php', './demo.html')){
echo "文件重命名成功!";
}else{
echo "文件重命名失败";
}
 
//截取文件示例
$fp = fopen('./data.txt', "r+") or die('文件打开失败');
if(ftruncate($fp, 1024)){
echo "文件截取成功!";
}else{
echo "文件截取失败!";
}
?>

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