Using PHP fputs() to Write Data to Files

In PHP, the fputs() function is used to write data to a file.

Syntax:

fputs ( resource $handle , string $string [, int $length ] ) : int|bool

Parameters:

$handle : file resource handle, typically obtained via fopen().

$string : the string to be written.

$length (optional): maximum number of bytes to write; defaults to the length of $string.

Return value:

Returns the number of bytes written on success, or false on failure.

Example:

<?php
$file = fopen("demo.txt", "w");

if ($file) {
    $content = "Hello, World!";
    $length = fputs($file, $content);

    if ($length !== false) {
        echo "Write successful, wrote " . $length . " bytes.";
    } else {
        echo "Write failed.";
    }

    fclose($file);
}
?>

The script opens demo.txt for writing, writes the string “Hello, World!”, checks the result, and closes the file to release the resource.

Note that the file must be opened in a writable mode (e.g., using fopen() with the “w” flag) before calling fputs(), and you should always close the handle with fclose() after writing.

Summary

The fputs() function provides a straightforward way to write strings to files in PHP, but proper opening modes and closing of file handles are essential for correct operation.