Reading and Writing Files in PHP
Writing Files
PHP offers multiple appproaches for writing data to files, ranging from low-level file pointer functions to convenient single-call wrappers.
Using fopen(), fwrite(), and fclose()
<?php
$fp = fopen("output.txt", "w") or die("Cannot open file");
$content = "First line of data\n";
fwrite($fp ...
Posted on Mon, 24 Aug 2026 16:12:03 +0000 by fer0an
IO_FILE Heap Exploitation: Understanding fwrite Implementation
To learn IO_FILE-based heap exploitation, we must understand its underlying mechanism. This article examines several key IO functions using source code analysis and dynamic debugging.
1. fwrite Function Overview
1.1 Overall Flow
The main implementation of fwrite resides in _IO_new_file_xsputn, containing four distinct phases:
Check remaining s ...
Posted on Wed, 15 Jul 2026 16:12:40 +0000 by domwells27