Loop Counters

gistfile1.php

/**
 * Bitwise Check
 * If $count is an odd number returns true (1st expression).
 */
echo $count & 1 ? '' : '' ;

/**
 * Bitwise Check Usage
 * Add a class 'end' on every even loop (when expression returns false).
 */
$count = 0;
echo ++$count & 1 ? '' : ' end' ;

/**
 * Modulus
 * Every third $count returns true (1st expression).
 * Can use any modulus not just 3.
 */
echo $count % 3 == 0 ? '' : '' ;

/**
 * Modulus Usage
 * Add a class 'end' on every 3rd loop.
 */
$count = 0;
echo ++$count % 3 == 0 ? ' end' : '' ;