imageopenpolygon
(PHP 7 >= 7.2.0, PHP 8)
imageopenpolygon — Draws an open polygon
說(shuō)明
Signature as of PHP 8.0.0 (not supported with named arguments)
Alternative signature (deprecated as of PHP 8.1.0)
imageopenpolygon() draws an open polygon on the given
image. Contrary to imagepolygon(),
no line is drawn between the last and the first point.
參數
-
image -
由圖象創(chuàng )建函數(例如imagecreatetruecolor())返回的 GdImage 對象。
-
points -
An array containing the polygon's vertices, e.g.:
points[0] = x0 points[1] = y0 points[2] = x1 points[3] = y1 -
num_points -
Total number of points (vertices), which must be at least 3.
If this parameter is omitted as per the second signature,pointsmust have an even number of elements, andnum_pointsis assumed to becount($points)/2. -
color -
顏色標識符使用 imagecolorallocate() 創(chuàng )建。
返回值
成功時(shí)返回 true， 或者在失敗時(shí)返回 false。
更新日志
| 版本 | 說(shuō)明 |
|---|---|
| 8.1.0 |
The parameter num_points has been deprecated.
|
| 8.0.0 |
image expects a GdImage
instance now; previously, a resource was expected.
|
范例
示例 #1 imageopenpolygon() example
<?php
// Create a blank image
$image = imagecreatetruecolor(400, 300);
// Allocate a color for the polygon
$col_poly = imagecolorallocate($image, 255, 255, 255);
// Draw the polygon
imageopenpolygon($image, array(
0, 0,
100, 200,
300, 200
),
3,
$col_poly);
// Output the picture to the browser
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
?>
以上例程的輸出類(lèi)似于：
參見(jiàn)
- imagepolygon() - 畫(huà)一個(gè)多邊形