Technical stuff Requirements are like water. They're easier to build on when they're frozen.

<?php
// Did you notice the full-style opening PHP tags?

/**************************************************************
 * Variable Naming conventions
 *************************************************************
 * - Use data type as prefix inside the name
 *          Eg: $sName instead of just $name
 * - Try to use as descriptive names as possible
 *         Eg: $arProductList instead of just $arList
 **************************************************************/

/**************************************************************
 * Basic Datatypes conventions
 **************************************************************/

// Strings
$sName = "tekkie.ro";

// Integers
$iYear = 2004;

// Floats
$fAccountValue = 12.34;

// Booleans
$bCheck = true;

// Objects
$oProduct = new Product( $iProductId );

// Arrays
$aProperties = array ('1', '2', '3');

/**************************************************************
* Spacing convention
**************************************************************/

$iSum = $iNumber1 + $iNumber2;
$sSum = $iNumber1 . $iNumber2; // space dot space before and after a variable
$sSum = ' Here we add a number ' . $iNumber1; // quote space dot space after a string
$sSum = $iNumber2 . ' Here we add a number '; // space dot space quote before a string

/*
* Function definition convention
*
* A comment describing the function should precede its declaration.
* Begin with a slash followed by two stars.
* Give a one-line function synopsis, then a brief explanation.
*/

/**
 * bool hasPrices (obj oProduct [, bool bAlwaysTrue])
 *
 * @param Product the product we chack for prices
 * @param boolean
 * @return true if the Product has prices, false otherwise
*/

function hasPrices( $oProduct, $bAlwaysTrue = false ) {
    if ($bAlwaysTrue) return true;
    foreach ($oProduct->aProperties as $sProperty ) {
        if( 'price' === $sProperty ) {  // use === as often as possible; put the string first for speed reasons
            return( true );
        } // .. if
    }
    return( false );
} // END func hasPrices()

/*
 * echo tag
 */

define (CR, "\n");

echo 

	CR, 'Line1<br />',

	CR, 'Line2<br />',

	CR, 'Line3<br />'
;

/**************************************************************
 * Spacing convention
 **************************************************************/

// Code like this:

$sText = 'Time flies like an arrow.';
$sText .= ' Fruit flies like bananas.';

// Should be done in one statement instead of two:

$sText =
    'Time flies like an arrow.' .
    ' Fruit flies like bananas.'
;

?>