PHP Histogram generation code (Imagefilledrectugle function Example)

/** * PHP histogram imagefilledrectugle function use case * by bbs.it-home.org */ function CreateImage ($data, $twidth, $tspace, $height) { Header ("Content-type:image/jpeg"); $dataname = Array (); $datavalue = Array (); The value inside the//data $i = 0; $j = 0; $k = 0; $num = sizeof ($DATA); foreach ($data as $key = = $val) { $dataname [] = $key; $datavalue [] = $val; } $width = $num * ($twidth + $tspace) + 20;//Get the width of the image $im = Imagecreate ($width, $height);//Create Image $bgcolor = Imagecolorallocate ($im, 255,255,255);//Background color $jcolor = Imagecolorallocate ($im, 255,255,0);//Background color of Rectangle $acolor = Imagecolorallocate ($im, 0,0,0);//Line Color Imageline ($im, $height -20, $width -5, $height -20, $acolor);//x axis Imageline ($im, $height -20,25,2, $acolor);//y Shaft while ($i < $num) { Imagefilledrectangle ($im, $i * ($tspace + $twidth) +40, $height-$datavalue [$i]-20, $i * ($twidth + $tspace) + $tspace +40,$ HEIGHT-20, $jcolor);//Draw a rectangle Imagestring ($im, 3, $i * ($tspace + $twidth) +40+ $twidth/2, $height-$datavalue [$i]-35, $datavalue [$i], $acolor);// Write a value on a pillar Imagestring ($im, 3, $i * ($tspace + $twidth) +40+ $twidth/2, $height -15, $dataname [$i], $acolor);//write a value under a pillar $i + +; } while ($j < 400/10) { Imageline ($im, $height -20)-$j *8,28, ($height -20)-$j *8, $acolor);//Draw a scale Imagestring ($im, 2,5, ($height -30)-$j *8, $j *10, $acolor);//Mark scale value $j = $j +10; } Imagejpeg ($im); } $data =array ("1" =>25, "2" =>30, "3" =>21); CreateImage ($data, 40,40,300); ?> Copy Code

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