Part of title bold?

[gt651]

In this application ( graphbarometer.com ), is it possible to make the
$pressure value at the end of the title Bold?

$title = $y . " Current " . $pressure;

Thanks Gary

[lbayuk]

There isn't any way (in PHPlot, or PHP/GD for that matter) to switch fonts in
the middle of a string. The way to do what you want in PHPlot is using a
drawing callback to draw 2 strings, one in a normal font, and one in bold,
lined up so they appear to be a single line of text. It isn't that hard, but
only you can decide if it is worth it for your application. Here is a simple
example. It does not attempt to center the text or position it relative to the
top of the plot (taking into account the font size). These are also possible,
but more work.

<?php
require_once 'phplot.php';
define('FONT_NORMAL', 'LiberationSans-Regular.ttf'); // System dependent
define('FONT_BOLD', 'LiberationSans-Bold.ttf'); // System dependent

// Drawing callback function:
function add_title($img, $title)
{
    $black = imagecolorresolve($img, 0, 0, 0);
    $x = 20;
    $y = 40;
    $bbox = imagettftext($img, 12, 0, $x, $y, $black, FONT_NORMAL, $title[0]);
    $x += $bbox[2] - $bbox[0]; // Skip past width of first part
    imagettftext($img, 12, 0, $x, $y, $black, FONT_BOLD, $title[1]);
}

$data = array(array('A', 1), array('B', 2), array('C', 3));
$p = new PHPlot(800, 600);
$p->SetDataType('text-data');
$p->SetDataValues($data);
$p->SetMarginsPixels(NULL, NULL, 60); // Leave room at top for special title
$p->SetPlotType('bars');
$p->SetCallback('draw_all', 'add_title', array('Plain Text ', 'Bold Text'));
$p->DrawGraph();

[gt651]

OK thanks lbayuk, I'll work with it but it's probably a bit much for me.