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PHP file itself

Nov 11, 2016 am 09:37 AM

<?php  
//文件本身的操作  
//copy()复制文件  
//unlink()删除文件  
//ftruncate()将文件截断到指定的长度  
//rename()重命名文件或目录  
if(copy("data.txt","data_bak.txt")){//复制文件实例  
echo "文件复制成功<br />";  
}else{  
echo "文件复制失败<br />";  
}  
 if(file_exists("data_bak.txt")){//删除文件实例  
if(unlink("data_bak.txt")){  
echo "文件删除成功<br />";  
}else{  
echo "文件删除失败<br />";  
}  
}else{  
echo "目标文件不存在<br />";  
}   
 if(rename("file.jpg","file.txt")){//重命名文件实例  
echo "文件重命名成功<br />";  
}else{  
echo "文件重命名失败<br />";  
}   
$fp=fopen("data_bak.txt","r+") or die("文件打开失败");  
if(ftruncate($fp,1024)){  
echo "文件截取成功";  
}else{  
echo "文件截取失败";  
}  
fclose($fp);  
?>

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