barchart.php?b1=50&b2=100&b3=120&b4=30
or <iframe src=barchart.php?b1=50&b2=100&b3=120&b4=30 height=200 width=200></iframe>
or <img src=barchart.php?b1=50&b2=100&b3=120&b4=30>
Can test at http://www.yonok.ac.th/burin/php/barchart.php?b1=50&b2=100&b3=120&b4=30