Dedicated web hosting - PHP SOLUTIONS: DYNAMIC WEB DESIGN MADE EASY //
PHP SOLUTIONS: DYNAMIC WEB DESIGN MADE EASY // otherwise leave the cell empty else { echo ‘ ’; } ?>
It looks like a lot, but the code breaks down into three sections: the first creates a back link if $curPage is greater than 0; the second pads the final table row with empty cells if there are more than two columns; and the third uses the same formula as before ($startRow+SHOWMAX < $totalPix) to determine whether to display a forward link. When typing this code, make sure that you get the combination of quotes right in the links. The other point to note is that the $curPage-1 and $curPage+1 calculations are enclosed in parentheses to avoid the period after the number being misinterpreted as a decimal point. It s used here as the concatenation operator to join the various parts of the query string. 2. You now need to add the value of the current page to the query string in the link surrounding the thumbnail. Locate this section of code: ?image=&curPage=“> You want the same subset to be displayed when clicking a thumbnail, so you just pass the current value of $curPage through the query string. Notice that I have used the HTML entity & to add a second name/value pair to the query string. This is displayed in the browser status bar or address bar simply as an ampersand. Although using an ampersand on its own also works, & is required for valid XHTML. 3. Save the page and test it. Click the Next link, and you should see the remaining subset of thumbnails, as shown in Figure 12-5. There are no more images to be displayed, so the Next link disappears, but there s a Prev link at the bottom left of the thumbnail grid. The record counter at the top of the gallery now reflects the range of thumbnails being displayed, and if you click the right thumbnail, the same subset remains onscreen while displaying the appropriate large image. You re done!
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