- chr: documentation ( source)
<?php
$img = imagecreatefromjpeg('http://logicnet.dk/Analyzer/help/Lenna.jpg');
for($i=0;$i<64;$i+=8)
{
$msgchar = 5;
if(($i+8) % $img.rowlength == 0)
{
$msg .= chr($msgchar);
$msgchar = 0;
}
}
echo $msg;