imageellipse

Draw an ellipse (PHP 4 >= 4.0.6, PHP 5)
bool imageellipse ( resource image, int cx, int cy, int width, int height, int color )

Draws an ellipse centered at the specified coordinates.

Parameters

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
cx: x-coordinate of the center
cy: y-coordinate of the center
width: The ellipse width
height: The ellipse height
color: The color of the ellipse. A color identifier created with imagecolorallocate()

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 1006. imageellipse() example

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<?php

// create a blank image
$image = imagecreatetruecolor(400, 300);

// fill the background color
$bg = imagecolorallocate($image, 0, 0, 0);

// choose a color for the ellipse
$col_ellipse = imagecolorallocate($image, 255, 255, 255);

// draw the ellipse
imageellipse($image, 200, 150, 300, 200, $col_ellipse);

// output the picture
header("Content-type: image/png");
imagepng($image);

?>

The above example will output something similar to:

Notes

Note:

This function requires GD 2.0.2 or later.

See Also

imagefilledellipse()

imagearc()

Related Examples ( Source code ) » imageellipse

Code Examples / Notes » imageellipse

When you wana use "ImageEllipse" function in under GD 2.0.2 version, you can use "ImageArc" like bellow ---------------------------------------------------- $file_name = "test.png"; $screen_x = 300; $screen_y = 200; $x1 = $screen_x / 2; $y1 = $screen_y / 2; $radius = 30; $image = ImageCreate($screen_x, $screen_y); $black = ImageColorAllocate($image, 0,0,0); ImageArc($image, $x1, $y1, $radius , $radius , 0, 360, $black); ImagePng($image, $file_name); ImageDestroy($image); ----------------------------------------------------

This is an optimised and bug fixed version of nojer at yahoo dot com's rotatedellipse function. I've changed it so that the arguments are compatible with imageellipse. See notes on imagearc for original version. <?php function rotatedellipse($im, $cx, $cy, $width, $height, $rotateangle, $colour, $filled=false) { // modified here from nojer's version // Rotates from the three o-clock position clockwise with increasing angle. // Arguments are compatible with imageellipse. $width=$width/2; $height=$height/2; // This affects how coarse the ellipse is drawn. $step=3; $cosangle=cos(deg2rad($rotateangle)); $sinangle=sin(deg2rad($rotateangle)); // $px and $py are initialised to values corresponding to $angle=0. $px=$width * $cosangle; $py=$width * $sinangle; for ($angle=$step; $angle<=(180+$step); $angle+=$step) { $ox = $width * cos(deg2rad($angle)); $oy = $height * sin(deg2rad($angle)); $x = ($ox * $cosangle) - ($oy * $sinangle); $y = ($ox * $sinangle) + ($oy * $cosangle); if ($filled) { triangle($im, $cx, $cy, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour); triangle($im, $cx, $cy, $cx-$px, $cy-$py, $cx-$x, $cy-$y, $colour); } else { imageline($im, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour); imageline($im, $cx-$px, $cy-$py, $cx-$x, $cy-$y, $colour); } $px=$x; $py=$y; } } function triangle($im, $x1,$y1, $x2,$y2, $x3,$y3, $colour) { $coords = array($x1,$y1, $x2,$y2, $x3,$y3); imagefilledpolygon($im, $coords, 3, $colour); } ?>

if you want to display an ellipse in the upper left corner of an image, you can easily calculate the corresponding cx and cy values. this example will draw an ellipse having the same width and height as the image. <?php $ellipse_width = 100; $ellipse_height = 200; $ellipse_cx = ($ellipse_width / 2); $ellipse_cy = ($ellipse_height / 2); $img_x = $ellipse_width; $img_y = $ellipse_height; $img = imagecreate($img_x, $img_y); $bg = imagecolorallocate($img, 255,255,255); $ellipse_color = imagecolorallocate($img, 0, 0, 0); imageellipse($img, $ellipse_cx, $ellipse_cy, $ellipse_width, $ellipse_height, $ellipse_color); header("Content-type: image/png"); imagepng($img); imagedestroy($img); ?>

imageellipse

Draw an ellipse (PHP 4 >= 4.0.6, PHP 5) bool imageellipse ( resource image, int cx, int cy, int width, int height, int color )

Parameters

Return Values

Examples

Example 1006. imageellipse() example

Notes

Related Examples ( Source code ) » imageellipse

Code Examples / Notes » imageellipse

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Draw an ellipse (PHP 4 >= 4.0.6, PHP 5)
bool imageellipse ( resource image, int cx, int cy, int width, int height, int color )