Use of fopen() function in php (with code examples)

The previous article "Analysis of the sprintf() function in php (with code examples)", this article introduces fopen() Function, php is a scripting language. In actual use, we may need to read some files and obtain their contents. At this time, we can use the fopen() function , this article will take you to take a look. First, let’s take a look at the syntax of fopen()

fopen ( string $filename   , string $mode   , bool $use_include_path = false   , resource $context = ?   )

• $filename: the file or URL to be opened.

• $mode: The parameter specifies the type of access required to the stream

• $use_include_path: If you also need to search for files in include_path , can be set to '1' or true.

• $context: Support for context content

• Return value: Returns the file pointer resource on success. If the opening fails, this function returns false .

Code example:

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

$user=array();
$i=0;
 //输出文本中所有的行，直到文件结束为止。
while(! feof($file))
 {
 $user[$i]= fgets($file);//fgets()函数从文件指针中读取一行
 $i++;
 }
 fclose($file);
 print_r($user);

?>

输出：
Array
(
    [0] => php.cn
)

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