How to use php fwrite function

php The fwrite function writes to a file (safe for binary files). Its syntax is fwrite(file,string,length). The parameter file is required and specifies the open file to be written. string is required and specifies the file to be written. String.

#php How to use the fwrite function?

Definition and Usage

fwrite() function writes to a file (safe to use with binary files).

Syntax

fwrite(file,string,length)

Parameters

file Required. Specifies the open file to be written to.

string Required. Specifies the string to be written to the file.

length Optional. Specifies the maximum number of bytes to be written.

Description

fwrite() writes the contents of string to the file pointer file. If length is specified, writing will stop when length bytes have been written or when the string has been written, whichever occurs first.

fwrite() returns the number of characters written, or false if an error occurs.

Example

<?php
$file = fopen("test.txt","w");
echo fwrite($file,"Hello World. Testing!");
fclose($file);
?>

Output:

21

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