FileSystem Function in PHP: PART 4

Introduction

In this article I describe the PHP FileSystem functions fflush, fgetc, fgetcsv and fgets. To learn some other filesystem functions, go to:

PHP fflush() function

The PHP filesystem fflush function flushes the output to a file and it returns true on success and false on failure.

Syntax

fflush(file)

Parameter in fflush function

The parameter of the function is:

Parameter	Description
file	It specifies the open file to check.

Example

An example of the function is:

<?php
$filename = 'test.txt';
$file = fopen($filename, 'r+');
rewind($file);
fwrite($file, 'great day');
fflush($file);
fclose($file);
?>

PHP fgetc() function

The PHP filesystem fgetc function gets a character from the file pointer and this function returns a string containing a single character read from the file pointed to by the handle or returns false on EOF.

Syntax

fgetc(file)

Parameter in fgetc function

The parameter of the function is:

Parameter	Description
file	It specifies the open file to check.

Example

An example of the function is:

<?php
$file = fopen("test.txt", "r");
while (!feof($file))
{
echo fgetc($file);
}
fclose($file);
?>

Output

PHP fgetcsv() function

The PHP filesystem fgetcsv function gets a line from the file pointer and parses for CSV fields and returns an indexed array containing the fields read.

Syntax

fgetcsv(file, length,separator,enclousure)

Parameter in fgetcsv function

The parameters of the function are:

Parameter	Description
file	It specifies the file to check.
length	It specifies the maximum length of a line.
separator	It specifies a character that specifies the field separator.
file	It specifies a character that specifies the field enclosure character..

Example

An example of the function is:

<?php
$file = fopen("test.csv","r");
print_r(fgetcsv($file));
fclose($file);
?>

Output

PHP fgets() function

The PHP filesystem fgets a line from the file pointer and this function returns false on failure.
Syntax

fgets(file, length,separator,enclousure)

Parameters in fgets function

The parameters of the function are:

Parameter	Description
file	It specifies the file to read from.
file	It specifies the number of bytes to read.

Example

An example of the function is:

<?php
$file = fopen("test.csv","r");
print_r(fgetcsv($file));
fclose($file);
?>

Output