在图片上添加透明度渐变的效果_php

<?php
////$strimgsrc = file_get_contents("http://127.0.0.1/5307754.jpg&quot;);
////$imgsrc = imagecreatefromstring($strimgsrc);
$imgsrc = imagecreatefromjpeg("5307754.jpg");
$imgsrcw = imagesx($imgsrc);
$imgsrch = imagesy($imgsrc);

$width = 30;

http://www.gaodaima.com/48430.html在图片上添加透明度渐变的效果_php

$x1 = 2;
$x2 = $imgsrcw – $x1 – 20;
$y1 = ($imgsrch – $width) – 2;
$y2 = $y1 + $width;

$steps = $x2 – $x1;
for($i = 0; $i < $steps; $i ++)
{
        $alphax = round($i/($steps/127))+60;
        if($alphax >= 128)
                $alphax = 127;
        $alpha = imagecolorallocatealpha($imgsrc, 255, 255, 255, $alphax);
        imagefilledrectangle($imgsrc, ($i+$x1), $y1, ($i+$x1+1), $y2, $alpha);
}

header(‘content-type: image/jpeg’);

imagejpeg($imgsrc);
imagedestroy($imgsrc);
?>

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