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HomeBackend DevelopmentPHP Tutorial《php基础教程》——四文件和目录 学习总结

《php基础教程》——4文件和目录 学习总结
一、写入文件:
$fp = fopen(filename, mode);
  mode 为打开文件方式比如 ‘a+’表示读写文件,文件不存在则创建,新数据主加到文件尾部

fwrite($fp,写入内容);

fclose($fp);

二、锁定文件:当有多个用户同时对文件操作时保证不出现冲突

        fclock($fp, 锁定类型); //锁定类型包括写入独享、读取共享……

三、读取文件:

$data = file('文件路径');

将读取的数据放到data数组内,每个元素为文件的一行。

编码测试:ws.php:

   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>test</title><base>   <?phpif (isset($_POST[&#39;submitted&#39;])) {	if (!empty($_POST[&#39;quote&#39;]) && ($_POST[&#39;quote&#39;] != "enter your quotation here")){//Write the data to file.			$fp = fopen(&#39;../test.txt&#39;,&#39;a+&#39;);			flock($fp, LOCK_EX);// lock the file						fwrite($fp, $_POST[&#39;quote&#39;]);						flock($fp, LOCK_UN);// unlock			fclose($fp);			//read the file&#39;s content to an array $data:			$data = file(&#39;../test.txt&#39;);			print &#39;<p style = "color: red;"> data[0]:\n ' .$data[0]. '';	}	else{		print 'please enter your quotation';	}}?>	

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测试裁图:

起始:


结果:




五、处理文件上传:

1.form标签必须包含:enctype="multipart/form-data",表单必须用post方法

2.必须添加一个隐藏输入框,建议浏览器最大上传文件大小(以字节计)

3.创建表单字段

代码测试:ws.php:

   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>test</title><base>   <?phpif (isset($_POST[&#39;submitted&#39;])) {	if (move_uploaded_file($_FILES[&#39;thefile&#39;][&#39;tmp_name&#39;],"../uploads/{$_FILES[&#39;thefile&#39;][&#39;name&#39;]}")){			print &#39;<p>your file is upload!';	}	else{		$errors = $_FILES['thefile']['error'];		print $errors;	}}?>	

Upload a file

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六、目录

1.导航目录:

查找目录中所有内容:scandir();

eg: $stuff = scandir('目录名');//函数返回一个数组,包含目录中的文件和目录,复制给$stuff

2.创建目录:

mkdir( '路径名' );


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