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Create A Tag Cloud

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  1. function getCloud( $data = array(), $minFontSize = 12, $maxFontSize = 30 )
  2. {
  3. 	$minimumCount = min( array_values( $data ) );
  4. 	$maximumCount = max( array_values( $data ) );
  5. 	$spread       = $maximumCount - $minimumCount;
  6. 	$cloudHTML    = '';
  7. 	$cloudTags    = array();
  8.  
  9. 	$spread == 0 && $spread = 1;
  10.  
  11. 	foreach( $data as $tag => $count )
  12. 	{
  13. 		$size = $minFontSize + ( $count - $minimumCount )
  14. 			* ( $maxFontSize - $minFontSize ) / $spread;
  15. 		$cloudTags[] = '<a style="font-size: ' . floor( $size ) . 'px'
  16. 		. '" class="tag_cloud" href="#" title="\'' . $tag  .
  17. 		'\' returned a count of ' . $count . '">'
  18. 		. htmlspecialchars( stripslashes( $tag ) ) . '</a>';
  19. 	}
  20.  
  21. 	return join( "\n", $cloudTags ) . "\n";
  22. }
  23. /**************************
  24. ****   Sample usage    ***/
  25. $arr = Array('Actionscript' => 35, 'Adobe' => 22, 'Array' => 44, 'Background' => 43,
  26. 	'Blur' => 18, 'Canvas' => 33, 'Class' => 15, 'Color Palette' => 11, 'Crop' => 42,
  27. 	'Delimiter' => 13, 'Depth' => 34, 'Design' => 8, 'Encode' => 12, 'Encryption' => 30,
  28. 	'Extract' => 28, 'Filters' => 42);
  29. echo getCloud($arr, 12, 36);

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