Appending random string

captcha code problem

[kkonline]

When i write

<?php  echo "<img src='/includes/seccode.inc.php?randomString=' . md5(microtime()) . '' width='71' height='21' align='absmiddle'>"?></td>

to append a random string on the secure code (captcha script) in the SOURCE CODE i get

the following

<img src='/includes/seccode.inc.php?randomString=' . md5(microtime()) . '' width='71' height='21' align='absmiddle'></td>

rather than the actual value of randomstring which should be appended.

What is the problem with the code?

[eelixduppy]

It should be taken out of the quotes like this:

<?php echo "<img src='/includes/seccode.inc.php?randomString=" . md5(microtime()) . "' width='71' height='21' align='absmiddle'>"?></td> 

[kkonline]

ya that worked! But i don't know why i always make those kind of mistakes... regarding concatenation or strings...

any good tutorial u'll suggest for it?

[eelixduppy]

You can read the documentation for strings [us2.php.net].