It is a scope resolution operator that can be found in Php. Paamayim Nekudotayim in Hebrew means “twice colon” or “double colon”.

I bought a macbook last december 2009 and transfer my files from my windows laptop. After the the transfer, the first thing I did is to browse the projects that I’ve done. While browsing, I came across a page where in there is a file upload facility. Then I started to upload a file. While uploading, it suddenly popped an error. Then I checked the folder I used to put the file uploads and found out the file is not there. What could be the solution? It’s the upload_tmp_dir found in the php.ini. Just make sure that the folder path where you put the uploaded file is specified.

Whats is the difference between mysql_num_rows() and mysql_affected_rows()? mysql_num_rows() is used together with select statements while the mysql_affected_rows() is used with update, delete and insert statements.

An example of mysql_affected_rows().

$result = mysql_query( "INSERT INTO mysqltable
								VALUES( NULL, '$value' )" );
$rows = mysql_affected_rows();
// returns 1

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Using a variable to store the returned data of a function. Instead of typing multiple literal function names, just call the variable.

function what_is_my_country( $var ) {
	echo "My country is $var.";
}

$country = 'what_is_my_country';
$country('United States');

A captcha program can tell if a user is a human or a computer. Most websites use captcha in order to prevent spam. You can see this mostly in contact and signup forms. One great captcha service that is available today is reCaptcha. If you are not quite familiar with how reCaptcha works, I’ll show you how. First, you must get an API key first at http://recaptcha.net/api/getkey. After you get the public and private keys, create an xhtml file and insert the snippet below at the head section of the file.

<script src="http://api.recaptcha.net/js/recaptcha_ajax.js" type="text/javascript"></script>

Next, we will be needing the Mootools library which we will use in order for Recaptcha.js to function.
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