رسم نمودار با PHP
<?php
// Prevent direct access
if(realpath($_SERVER['SCRIPT_FILENAME']) == realpath(__FILE__)) {
header('location: index.php');
exit();
}
function chart(
$title = NULL,
$values = NULL,
$filename = NULL,
$width = NULL,
$height = NULL,
$min = NULL,
$max = NULL,
$scale = NULL,
$showvalues = NULL,
$fontsize = NULL,
$fontcolor = NULL,
$backcolor = NULL,
$fillcolor = NULL,
$linecolor = NULL,
$dotscolor = NULL,
$gridcolor = NULL,
$textcolor = NULL
) {
// Default configuration
if(is_null($title)) { $title = 'Chart'; }
if(is_null($values)) { $values = array(); }
if(is_null($filename)) { $filename = 'chart.png'; }
if(is_null($width)) { $width = 640; }
if(is_null($height)) { $height = 480; }
if(is_null($min)) { $min = 0; }
if(is_null($max)) { $max = 100; }
if(is_null($scale)) { $scale = 25; }
if(is_null($showvalues)) { $showvalues = true; }
if(is_null($fontsize)) { $fontsize = 10; }
if(is_null($fontcolor)) { $fontcolor = array(127, 0, 0); }
if(is_null($backcolor)) { $backcolor = array(255, 255, 255); }
if(is_null($fillcolor)) { $fillcolor = array(191, 191, 191); }
if(is_null($linecolor)) { $linecolor = array( 0, 0, 0); }
if(is_null($dotscolor)) { $dotscolor = array( 0, 127, 0); }
if(is_null($gridcolor)) { $gridcolor = array(127, 127, 127); }
if(is_null($textcolor)) { $textcolor = array( 0, 0, 127); }
// Internal configuration
$chart_bottom = floor($height * 0.85);
$chart_left = floor($width * 0.15);
$chart_right = floor($width * 0.95);
$chart_top = floor($height * 0.05);
$cx = floor($width / 2 );
$cy = floor($height / 2 );
$scale_x = floor(($chart_right - $chart_left) / (count($values) + 1));
$scale_y = floor(($chart_bottom - $chart_top) / (($max - $min) / $scale));
$font_regular = 'tahoma.ttf';
$font_bold = 'tahoma_bold.ttf';
$keys = array_keys($values);
$count = count($keys);
// Main function
$result = true;
$im = @imagecreatetruecolor($width, $height);
if($im !== false) {
$back = imagecolorallocate($im, $backcolor[0], $backcolor[1], $backcolor[2]);
$dots = imagecolorallocate($im, $dotscolor[0], $dotscolor[1], $dotscolor[2]);
$fill = imagecolorallocate($im, $fillcolor[0], $fillcolor[1], $fillcolor[2]);
$font = imagecolorallocate($im, $fontcolor[0], $fontcolor[1], $fontcolor[2]);
$grid = imagecolorallocate($im, $gridcolor[0], $gridcolor[1], $gridcolor[2]);
$line = imagecolorallocate($im, $linecolor[0], $linecolor[1], $linecolor[2]);
$text = imagecolorallocate($im, $textcolor[0], $textcolor[1], $textcolor[2]);
// Fill with background color
imagefill($im, $cx, $cy, $back);
// Draw internal space of chart
imagerectangle($im, $chart_left, $chart_top, $chart_right, $chart_bottom, $line);
imagefill($im, $cx, $cy, $fill);
// Draw horizontal grid lines
for($i = $chart_bottom - $scale_y; $i > $chart_top; $i -= $scale_y) {
imageline($im, $chart_left, $i, $chart_right, $i, $grid);
}
// Draw vertical grid lines
for($i = $chart_left + $scale_x; $i < $chart_right; $i += $scale_x) {
imageline($im, $i, $chart_bottom, $i, $chart_top, $grid);
}
// Draw dots and/or write values
for($i = 0, $j = $chart_left + $scale_x; $i < $count && $j <= $chart_right; $i++, $j += $scale_x) {
$cy = $chart_bottom;
$y = $min;
while($y < $values[$keys[$i]]) {
$y++;
$cy -= $scale_y / $scale;
}
imagefilledarc($im, $j, $cy, $scale, $scale, 0, 360, $dots, IMG_ARC_PIE);
imagearc($im, $j, $cy, $scale, $scale, 0, 360, $line);
if($showvalues) {
$box = imagettfbbox($fontsize, 0, $font_bold, $values[$keys[$i]]);
imagettftext($im, $fontsize, 0, $j - $box[4] / 2, $cy - $box[5] / 2, $font, $font_bold, $values[$keys[$i]]);
}
}
// Write X-axis labels
for($i = 0, $j = $chart_left + $scale_x; $i < $count && $j <= $chart_right; $i++, $j += $scale_x) {
$box = imagettfbbox($fontsize, 0, $font_regular, $keys[$i]);
imagettftext($im, $fontsize, 0, $j - $box[4] / 2, $chart_bottom + 15, $font, $font_regular, $keys[$i]);
}
// Write Y-axis labels
for($i = $min, $j = $chart_bottom; $i <= $max, $j >= $chart_top; $i += $scale, $j -= $scale_y) {
$box = imagettfbbox($fontsize, 0, $font_regular, $i);
imagettftext($im, $fontsize, 0, $chart_left - $box[4] - 15, $j - $box[5] / 2, $font, $font_regular, $i);
}
// Write title
$box = imagettfbbox($fontsize * 2, 0, $font_bold, $title);
imagettftext($im, $fontsize * 2, 0, ($width - $box[4]) / 2, $chart_bottom - ($box[5] / 2) + ($height - $chart_bottom) / 2, $text, $font_bold, $title);
// Output the chart image
if(!imagepng($im, $filename, 9)) {
$result = false;
}
imagedestroy($im);
}
return $result;
}
?>
مثالی از کاربرد:
کد HTML:
<!doctype html>
<html>
<head>
<title>Chart DEMO</title>
<meta charset="utf-8"/>
</head>
<body>
<?php
require_once 'chart.php';
$title = 'My Chart';
$values = array('ASP' => -25, 'JSP' => 15, 'ASP.NET' => 50, 'PHP' => 100);
$filename = 'MyChart.png';
if(chart($title, $values, $filename, NULL, NULL, -50, 125, 25, true, 10)) {
echo '<img border="10px" src="'.$filename.'"/><br/>'.PHP_EOL;
}
?>
</body>
</html>
نمونه خروجی:
MyChart.jpg
امیدوارم این هم به درد بخوره. موفق باشید.
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