提醒它的原因是什么

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Release： 2016-06-13 12:10:14

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提示它的原因是什么

本帖最后由 lyhjc_2014 于 2014-11-20 15:47:26 编辑

<?php<br />  $file_path = "test.txt";<br />  if (file_exists($file_path))<br />  <br />  {<br />  	$fp=fopen($file_path, "a+");<br />  	$con=fread($fp, filesize($file_path));<br />  	echo $con;<br />  }else <br />  {<br />  	echo "文件不存在";<br />  }<br />  fclose($fp);<br />?>

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上面的写法为啥当文件test.txt是0字节的时候提示这个呢
Warning: fread() [function.fread]: Length parameter must be greater than 0 in D:\APMServ5.2.6\www\htdocs\01\file.php on line 7

另外上面和下面这两种读取方式哪个更好点

<?php<br />  $file_path = "test.txt";<br /><br />  $con=file_get_contents($file_path);<br />  $con=str_replace("\r\n","<br/>",$con);<br />  echo $con;<br />?>

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------解决思路----------------------
下面的要好点，上面的fread有各种限制

Related labels：

file fread nbsp path

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