snippet های php

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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:

<!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.