Detailed explanation of php fwrite() function writing file example

php What does the fwrite() function do?

In php, the php fwrite() function is used to write files (safe for binary files). It is to add a new element to the file. Let’s take a look at its syntax:

Syntax

fwrite(file,string,length)

Parameter details:

Parameters	Description
file	Required. Specifies the open file to write to.
string	Required. Specifies the string to be written to the open file.
length	Optional. Specifies the maximum number of bytes to be written.

Description

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

The fwrite function is successfully executed and returns the number of bytes written. On failure, returns FALSE.

Example

php fwrite() function example, the code is as follows:

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

Detailed explanation of the example:

Use the fwrite function, to A file named test.txt, add the string "Hello World. Testing!" to it.

Code running results:

21

If we open the test.txt file at this time, we will see the newly added content "Hello World. Testing!".

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