fgets

Name:fgets

Category:File system

Programming Language:php

One-line Description:Return a line from the opened file.

Definition and usage

The fgets() function reads a line from a file pointer.

实例

例子 1

<?php

$file = fopen("test.txt","r");
echo fgets($file);
fclose($file);

?>

输出类似：

Hello, this is a test file.

例子 2

<?php

$file = fopen("test.txt","r");

while(! feof($file))
  {
  echo fgets($file). "<br />";
  }

fclose($file);
?>

输出类似：

Hello, this is a test file. 
There are three lines here. 
This is the last line.

grammar

 fgets ( file , length )

parameter	describe
file	Required. Specifies the file to be read.
length	Optional. Specifies the number of bytes to be read. The default is 1024 bytes.

illustrate

Read a line from the file pointed to by the file and return a string of length up to length - 1 byte. It encounters a newline character (including in the return value), EOF, or stops after length - 1 byte has been read (it depends on which case it encounters first). If length is not specified, the default is 1K, or 1024 bytes.

If it fails, return false.