imagefilltoborder

(PHP 4, PHP 5, PHP 7, PHP 8)

imagefilltoborder — 区域填充到指定颜色的边界为止

说明

imagefilltoborder(
    resource $image,
    int $x,
    int $y,
    int $border,
    int $color
): bool

imagefilltoborder() 从 x，y（图像左上角为 0, 0）点开始用 color 颜色执行区域填充，直到碰到颜色为 border 的边界为止。【注：边界内的所有颜色都会被填充。如果指定的边界色和该点颜色相同，则没有填充。如果图像中没有该边界色，则整幅图像都会被填充。】

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User Contributed Notes 2 notes

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edrad at wanadoo dot fr ¶

19 years ago


Very useful to build a pseudo-sphere with a color gradient...

<?php
 $width = 300;
$center = $width / 2;
$colordivs = 255 / $center;
$im = @imagecreate($width, $width);
$back_color = imagecolorallocate($im, 20, 30, 40);
imagefill($im, 0, 0, $back_color); 
 for ($i = 0; $i <= $center; $i++)
 {
     $diametre = $width - 2 * $i;
    $el_color = imagecolorallocate($im, $i * $colordivs, 0, 0);
    imagearc($im, $center, $center, $diametre, $diametre, 0, 360, $el_color);
    imagefilltoborder($im, $center, $center, $el_color, $el_color);
 }
imagepng($im);
?>

Dark Skull Software
http://www.darkskull.net

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admin at worldlanguages dot tk ¶

17 years ago


In the example below, for those with newer GD versions, it makes more sense to replace:

imagearc($im, $center, $center, $diametre, $diametre, 0, 360, $el_color);

with:

imageellipse($im, $center, $center, $diametre, $diametre, $el_color);

This is obviously simpler.

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备份地址：http://www.lvesu.com/blog/php/function.imagefilltoborder.php