PHP GD ttftext center alignment

Question

I\'m using imagettftext to make a bar graph and at the top of each bar I want to put the value.

I have the fol

Answer 1

You can calculate the center of your text by using PHP's imagettfbbox-function:

// define text and font
$text = 'some bar label';
$font = 'path/to/some/font.ttf';

// calculate text size (this needs to be adjusted to suit your needs)
$size = 10 / (strlen($text) * 0.1);

// calculate bar center
$barCenter = $x1 + ($x2 - $x1) / 2;

// calculate text position (centered)
$bbox = imagettfbbox($size, 0, $font, $text);
$textWidth = $bbox[2] - $bbox[0];
$positionX = $textWidth / 2 + $barCenter;
$positionY = $y1 - $size;

EDIT: Updated the code to do all the work for you.