function imagecircle($src, $dst)
{
//获取原图尺寸,并设置新图片的宽度和高度
//$src 原路径 $dst 保存路径
list($w, $h) = getimagesize($src);
if ($w > $h) {
$w = $h;
} else {
$h = $w;
}
$oimgSrc = imagecreatefromstring(file_get_contents($src));
$oimgDst = imagecreatetruecolor($w, $h);
imagealphablending($oimgDst, false);
$transparent = imagecolorallocatealpha($oimgDst, 0, 0, 0, 127);
$r = $w / 2;
for ($x = 0; $x < $w; $x++) {
for ($y = 0; $y < $h; $y++) {
$c = imagecolorat($oimgSrc, $x, $y);
$_x = $x - $w / 2;
$_y = $y - $h / 2;
if ((($_x * $_x) + ($_y * $_y)) < ($r * $r)) {
imagesetpixel($oimgDst, $x, $y, $c);
} else {
imagesetpixel($oimgDst, $x, $y, $transparent);
}
}
}
imagesavealpha($oimgDst, true);
imagepng($oimgDst, $dst);
imagedestroy($oimgDst);
imagedestroy($oimgSrc);
}
TP5 GD处理 头像处理圆形
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转载自blog.csdn.net/weixin_43784997/article/details/115235405
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