//retrieve the filename from db using a select query
$result= mysql_result("SELECT imagename  FROM imagetab");
$row=mysql_fetch_array($result);
//then i placed an image object with dynamic source like this
<img src="<?php echo $row[0]; ?>"/>

<?php
// Read and write for owner, nothing for everybody else
chmod("test.txt",0600);
 
// Read and write for owner, read for everybody else
chmod("test.txt",0644);
 
// Everything for owner, read and execute for everybody else
chmod("test.txt",0755);
 
// Everything for owner, read for owner's group
chmod("test.txt",0740);
?>