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# fwrite

(PHP 3, PHP 4 , PHP 5)

fwrite -- Binary-safe file write

## Description

int fwrite ( resource handle, string string [, int length])

fwrite() writes the contents of `string` to the file stream pointed to by `handle`. If the `length` argument is given, writing will stop after `length` bytes have been written or the end of `string` is reached, whichever comes first.

fwrite() returns the number of bytes written, or `FALSE` on error.

Note that if the `length` argument is given, then the magic_quotes_runtime configuration option will be ignored and no slashes will be stripped from `string`.

> Note: On systems which differentiate between binary and text files (i.e. Windows) the file must be opened with 'b' included in fopen() mode parameter.

Example 1. A simple fwrite example
`<?php $filename = 'test.txt'; $somecontent = "Add this to the file\n"; // Let's make sure the file exists and is writable first. if (is_writable($filename)) { // In our example we're opening $filename in append mode. // The file pointer is at the bottom of the file hence // that's where $somecontent will go when we fwrite() it. if (!$handle = fopen($filename, 'a')) { echo "Cannot open file ($filename)"; exit; } // Write $somecontent to our opened file. if (fwrite($handle, $somecontent) === FALSE) { echo "Cannot write to file ($filename)"; exit; } echo "Success, wrote ($somecontent) to file ($filename)"; fclose($handle); } else { echo "The file $filename is not writable"; } ?>`

See also fread(), fopen(), fsockopen(), and popen().

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