PHP fclose( ) Function

The fclose() function in PHP is an inbuilt function which is used to close a file which is pointed by an open file pointer. The fclose() function returns true on success and false on failure. It takes the file as an argument which has to be closed and closes that file.

Syntax:

bool fclose( $file )

Parameters: The fclose() function in PHP accepts only one parameter which is $file. This parameter specifies the file which has to be closed.

Return Value: It returns true on success and false on failure.

Errors And Exception:

1. A file has to be closed first using the fclose() function if it has been written via fwrite() function and you have to read the contents of the file.
2. The fclose() function in PHP doesn’t works for remote files.It only works on files which are accessible by the server’s filesystem.

Examples:

Input : $check = fopen("gfg.txt", "r");
        fclose($check);
Output : true

Input: $check = fopen("singleline.txt", "r");
       $seq = fgets($check);
       while(! feof($check))
       {
         echo $seq ;
         $seq = fgets($check);
       }
       fclose($check);
Output:true

Below programs illustrate the fclose() function:

Program 1:

<?php

// opening a file using fopen() function
$check = fopen("gfg.txt", "r");

// closing a file using fclose() function
fclose($check);

?>

Output:

true

Program 2: In the below program the file named singleline.txt contains only a single line “This file consists of only a single line”.

<?php

// a file is opened using fopen() function
$check = fopen("singleline.txt", "r");
$seq = fgets($check);

// Outputs a line of the file until
// the end-of-file is reached
while(! feof($check))
{
  echo $seq ;
  $seq = fgets($check);
}

// the file is closed using fclose() function
fclose($check);

?>

Output:

This file consists of only a single line.

Reference:
http://php.net/manual/en/function.fclose.php