php 图片上添加透明度渐变的效果

复制代码 代码如下:

<?php

////$strimgsrc = file_get_cont江南大学排名ents(“http://127.0.0.1/5307754.jpg”);

////$imgsrc = imagecreatefromstring($strimgsrc);

$imgsrc = imagecreatefromjpeg(“5307754.jpg”);

$imgsrcw = imagesx($imgsrc);

$imgsrc让爱碎了再碎h = imagesy($imgsrc);

$width = 30;

$x1 = 2;

$x2 = $imgsrcw – $x1 – 20;

$y1 = ($i廉颇老矣什么意思mgsrch – $width) – 2;

$y2 = $y1 + $width;

$steps = $x2 – $x1;

for($i = 0; $i < $steps; $i ++)

{

$alphax = round($i/($steps/127))+60;

if($alphax >= 128)

$alphashibadax = 127;

$alpha助学金 = imagecolorallocatealpha($imgsrc, 255, 255, 255, $alphax);

imagefilledrectangle($imgsrc, ($i+$x1), $y1, ($i+$x1+1), $y2, $alpha);

}

header(‘content-type: image/jpeg’);

imagejpeg($imgsrc);

imagedestroy($imgsrc);

?>