Question

When I launch my web page, increment doesn’t work correctly!

It should go like this: $i = from 1 to x (0,1,2,3,4,5,6 etc..).
But instead it jumps over every step giving result of (1,3,5,7 etc..).

Why is this code doing this?

<ul class="about">
        <?php
            $result = mysql_query("SELECT * FROM info WHERE id = 1");

            while ($row = mysql_fetch_assoc($result))
            {
                $bioText = $row['bio'];
            }

            $endBioTxt = explode("\n", $bioText);

            for ($i=0; $i < count($endBioTxt);)
            {
                if (checkNum($i) == true)
                {
                    echo "<li class='left'><div>".$endBioTxt[$i]."</div></li>";
                    echo $i;
                }
                else
                {
                    echo "<li class='right'><div>".$endBioTxt[$i]."</div></li>";
                    echo $i;
                }
                $i++;
            }


            // Function to check if number is prime
            function checkNum($num){
              return ($num % 2) ? TRUE : FALSE;
            }

        ?>
    </ul>

Output:

Sometext!(right side)
0
1
Sometext2!(right side)
2
3
…

Answer 1

This code works, please test it in your environment and then uncomment/comment what you need.

<?php

// This is how query should look like, not big fan of PHP but as far as I remember...
/*
$result = mysql_query("SELECT * FROM info WHERE id = 1");
$row = mysql_fetch_assoc($result);

$bioText = $row['bio'];
$endBioTxt = explode("\n", $bioText);
*/

$endBioTxt[0] = "one";
$endBioTxt[1] = "two";
$endBioTxt[2] = "three";
$endBioTxt[3] = "four";
$endBioTxt[4] = "five";

$totalElements = count($endBioTxt);

for ($i = 0; $i < $totalElements; $i++)
{
    if ($i % 2)
    {
        echo "<li class='left'><div>".$endBioTxt[$i]."</div></li>";
    }
    else
    {
        echo "<li class='right'><div>".$endBioTxt[$i]."</div></li>";
    }

    /*
    // This is how you should test if all your array elements are set
    if (isset($endBioTxt[$i]) == false)
    {
        echo "Array has some values that are not set...";
    }
    */
}

Edit 1

Try using $endBioTxt = preg_split('/$\R?^/m', $bioTxt); instead of explode.