2948 explained code solutions for 75 technologies


php-gdDraw bar chart


<?php

$data = [10, 40, 20, 60, 80, 75];

$im = imagecreatetruecolor(400, 300);
$c_black = imageColorAllocate($im, 0,0,0);

$c_green = imageColorAllocate($im, 46,204,64);
foreach ( $data as $i => $v ) {
  imagefilledrectangle($im, ($i + 1) * 50, 250 - $v,
                            ($i + 1) * 50 + 40, 250, $c_green);
}

imagePng($im, '/tmp/image.png');ctrl + c
$data

example data to draw bar chart based on

imagecreatetruecolor

creates true color GD image object with specified width & height

imageColorAllocate

creates color object to later use in image

imagefilledrectangle

creates filled rectangle

imagePng

saves image in PNG format to the given path


Draw bar chart, php gd

Usage example

<?php

$data = [10, 40, 20, 60, 80, 75];

$im = imagecreatetruecolor(400, 300);
$c_black = imageColorAllocate($im, 0,0,0);

$c_green = imageColorAllocate($im, 46,204,64);
foreach ( $data as $i => $v ) {
  imagefilledrectangle($im, ($i + 1) * 50, 250 - $v, ($i + 1) * 50 + 40, 250, $c_green);
}

imagePng($im, '/tmp/image.png');