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。】

User Contributed Notes

admin at worldlanguages dot tk 10-Sep-2004 02:54


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.

edrad at wanadoo dot fr 11-Jun-2003 05:02


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);

?>



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