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PHP学习笔记之php文件操作,

一、fstat函数:显示文件的所有信息

$file_path = "test.php";
if($fp=fopen($file_path,"a+")){
  $file_info=fstat($fp);
  echo "<pre class="brush:php;toolbar:false">";
  print_r($file_info);
  echo "
"; echo "文件大小为".$file_info['size']; echo "文件上次访问时间".date("Y-m-d H:i:s",$file_info['mtime']); } fclose($fp); //一定要关闭

  二、文件读取:

//第一种:
$con = fread($fp,filesize($file_path));
$con = str_replace("\r\n","<br>",$con);
echo "文件内容是".$con;
//第二种:将文件一下全部读取
$con = file_get_contents($file_path);
$con = str_replace("\r\n","<br>",$con);
echo "文件内容是".$con;
//第三种:一段一段读取
$buffer = 1024; 
//为了下载的安全,最好使用文件字节读取计数器
$file_count = 0;
//feof用于判断文件是否读取到文档尾
while(!feof($fp) && ($file_size-$file_count>0)){
$file_data = fread($fp,$buffer);
//统计读了多少个字节
$file_count+$buffer;
echo $file_data;  
} 

  三、写入文件:

 //1、传统方法写入文件
  $file_path = "test.txt";
  if(file_exists($file_path)){
    $fp = fopen($file_path,"a+");
    //打开方式:a+是追加内容。w+是覆盖原来的。
    $con = "Hello!\r\n";
    fwrite($fp,$con);
    echo "添加成功!";
  }else{
    echo "文件不存在";
  }
  fclose($fp);
  //2、第二种方法写入文件
  $file_path= "test.txt";
  $con = "北京你好!\r\n";
  file_put_contents($file_path,$con,FILE_APPEND);
  echo "成功"; 

  四、文件操作的应用:

//可以操作ini文件。将服务器的配置写在ini文件中,再对其进行操作。
  dbc.ini
  host=192.168.0.1
  admin=admin
  password=123456  
demo.php
  <&#63;php
    $con = parse_ini_file("dbc.ini");
    print_r($con);  
    &#63;> 
//将ini文件中的数据以数组形式读出,可以对其进行操作。 

  五、拷贝文件:

if(!copy("E:\\test.txt","D:\\1.txt")){
  echo "fail";
}else{
  echo "success";
} 

  六、创建文件

  创建文件夹:

//$path = "E:\\happy"; //文件夹路径
$path = "E:\\happy\aaa\bbb"; //多级文件夹
if(!is_dir($path)){
  if(mkdir($path,0777,true)){
    echo "success";
  }else{
    echo "fail";
  }
}else{
  echo "文件夹已存在";
} 

  创建文件:

$file_path = "E:\\happy.txt";
$fp = fopen($file_path,"w+");
fwrite($fp,"hello");
fclose($fp); 

  七、删除文件:

  删除文件夹:

$path = "E:\\happy\aaa\bbb"; //多级文件夹
if(rmdir($path)){
  echo "success";
}
//rmdir只能删除空文件夹,文件夹下有文件或目录均不能删除。 

    删除文件:

$file_path = "E:\\happy.txt";
if(is_file($file_path)){
  if(unlink($file_path)){
    echo "success";
  }else{
    echo "fail";
  }
}else{
  echo "文件不存在";
}

以上所述是小编给大家介绍的php文件操作的相关知识,希望对大家有所帮助。

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