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PHP | fputs( ) Function

  • Last Updated : 10 May, 2019

The fputs() function in PHP is an inbuilt function which is used to write to an open file.
The fputs() function stops at the end of the file or when it reaches the specified length passed as a parameter, whichever comes first.
The file, string and the length which has to be written are sent as parameters to the fputs() function and it returns the number of bytes written on success, or FALSE on failure.
The fputs() function is an alias of the fwrite() function.

Syntax:

fputs(file, string, length)

Parameters Used:
The fputs() function in PHP accepts three parameters.

  1. file: It is a mandatory parameter which specifies the file.
  2. string : It is a mandatory parameter which specifies the string to be written.
  3. length : It is an optional parameter which specifies the maximum number of bytes to be written.

Return Value:
It returns the number of bytes written on success, or False on failure.

Exceptions



  1. Both binary data, like images and character data can be written with this function since fputs() is binary-safe.
  2. fputs() function without the length parameter writes all data up to the end but it does not include the first 0th byte it encounters.

Examples:

Input : $myfile = fopen("gfg.txt", "w");
        echo fputs($myfile, "Geeksforgeeks is a portal of geeks!");
        fclose($myfile);
Output : 35

Input : $myfile = fopen("gfg.txt", "w");
        echo fputs($myfile, "Geeksforgeeks is a portal of geeks!", 13);
        fclose($myfile);
        fopen("gfg.txt", "r");
        echo fread($myfile, filesize("gfg.txt"));
        fclose($myfile);
Output : Geeksforgeeks

Below programs illustrate the fputs() function:

Program 1




<?php
// Opening a file
$myfile = fopen("gfg.txt", "w");
  
// writing content to a file using fputs
echo fputs($myfile, "Geeksforgeeks is a portal of geeks!");
  
// closing the file
fclose($myfile);
?>

Output:

35

Program 2




<?php
// Opening a file
$myfile = fopen("gfg.txt", "w");
  
// writing content to a file with a specified string length using fputs
echo fputs($myfile, "Geeksforgeeks is a portal of geeks!", 13);
  
// closing the file
fclose($myfile);
  
//opening the same file to read its contents        
fopen("gfg.txt", "r");
echo fread($myfile, filesize("gfg.txt"));
  
// closing the file
fclose($myfile);
?>

Output:

Geeksforgeeks

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




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