- fwrite: documentation ( source)
- fseek: documentation ( source)
- fread: documentation ( source)
- fopen: documentation ( source)
<?php
$sp = fopen("php://memory", 'w+');
fseek($sp, 1024); // fails why?
echo fwrite($sp, "abc"); // 3
fseek($sp, 1024); //
echo fread($sp, 3); // NULL..
$sp = fopen("/tmp/foo", 'w+');
fseek($sp, 1024);
echo fwrite($sp, "abc"); // 3
fseek($sp, 1024);
echo fread($sp, 3); // abc