Description
fopen() function is used to give PHP File Permissions like opening a file and gives more option to control the file.
| Mode | Description |
|---|---|
| r | Represents open a file for read.File pointer points to the initial point of the file. |
| w | Represents open empty file for writing.File pointer points to the initial point of the file. |
| a | Represents open a file to append the data to the existing file without erasing the existing data. File pointer begins at the end of the file. If no file exist, a new file is created. |
| x | Represent creation of a new file for write purpose only. Returns FALSE and an error if file already exists. |
| r+ | Represents open a binary file for read and write.File pointer points to the initial point of the file. |
| w+ | Represents open a binary file for write and read |
| r+ | Represents open a binary file for append and read |
| x+ | represents creation of a new file to read/write. Returns FALSE and an error if file already exists. |
Example
[php]
<!DOCTYPE html>
<html>
<body>
<?php
$filename = fopen("welcome.txt", "r") or die("Unable to open file!");
echo readfile($filename);
fclose($filename);
?>
</body>
</html>
[/php]
Description
fread() function can be used to read the file, which is opened with fopen.
Syntax:
fread($filename,filesize("file.txt"));
where the first parameter in fread() function is file name and the second parameter is filesize, representing how many bytes of data have to read.
Examples
[php]
<!DOCTYPE html>
<html>
<body>
<?php
$filename = fopen("random.txt", "r") or die("Unable to open file!");
echo fread($filename,filesize("random.txt"));
fclose($filename);
?>
</body>
</html>
[/php]
Description
The fclose() will close the file, which is opened with
fopen() function. Always do not forgot to close the file once the task is completed.It is a good programming practice to close the file after completing the task, so that server resources will not be wasted. Examples
[php]
<!DOCTYPE html>
<html>
<body>
<?php
$filename = fopen("random.txt", "r") or die("Unable to open file!");
echo fread($filename,filesize("random.txt"));
fclose($filename);
?>
</body>
</html>
[/php]
Points
- fopen() function is used to open a file.
- fread() function can be used to read the file,
- fclose() will close the file.