php 合成图片，合成圆形图片
合成图片方法
<?php
class Share {
/*
* 生成分享图片
* */
function cre_share_study_img(){
$auth = json_decode(base64_decode($_GET['auth']),true);
$url = trim(strip_tags($auth['url']));
$uid = max(0,strip_tags($auth['id'])); //120618218;
if(empty($url) || !$uid){
exit();
}
$userInfo = get_user_info($uid);
if(empty($userInfo) ){
exit();
}
$avatar = $userInfo['avatar'];
$nickname = $userInfo['nickname'];
$bg_img = ROOT_PATH.'/static/study/study_bg.png';
$imgArr=getimagesize($bg_img);
$bg_width = $imgArr[0];
$required_memory = $imgArr[0] * $imgArr[1] * $imgArr['bits'];
$new_limit=memory_get_usage() + $required_memory + 20000000;
ini_set("memory_limit", $new_limit);
$image = imagecreatefrompng($bg_img);
$black = imagecolorallocate($image, 61, 61, 61); // 黑色
$font = ROOT_PATH.'/static/redpacket/msyh.ttc';
$text = "{$nickname} 的书屋";
$text_len = (strlen($text) + mb_strlen($text,'utf-8')) / 2;
$text_begin = ($bg_width-($text_len*16))/2;
imagettftext($image, 26, 0, $text_begin, 380, $black, $font,$text);
// 头像
$is_icon = $this->put_file_from_url_content($avatar,ROOT_PATH.'/static/study/user_temp.png');
if($is_icon){ // 保存网络图片成功执行合并头像
$icon_img = $this->radius_img($is_icon);
header('Content-type: image/png;');
$is_icon_png = ROOT_PATH.'/static/study/user.png';
imagepng($icon_img,$is_icon_png);
imagedestroy($icon_img);
$imgsarr = getimagesize($is_icon_png);
$icon_width = $imgsarr[0];
if (strstr($imgsarr['mime'], 'jpeg')){
$icon_img = imagecreatefromjpeg($is_icon_png);
}else{
$icon_img = imagecreatefrompng($is_icon_png);
}
unlink($is_icon);
unlink($is_icon_png);
$avatarWidth = 155;
imagecopyresampled($image, $icon_img, ($bg_width-$avatarWidth)/2, 165, 0, 0, $avatarWidth, $avatarWidth, $icon_width, $icon_width);//合成头像到
}
//合成二维码到
$qrcode = $this->cre_qrcode($url);
$imgsarr = getimagesize($qrcode);
$icon_width = $imgsarr[0];
$qrcode = imagecreatefrompng($qrcode);
$code_img_w = 360;
imagecopyresampled($image, $qrcode, ($bg_width-$code_img_w)/2, 595, 0, 0, $code_img_w, $code_img_w,$icon_width, $icon_width);
header('Content-type: image/png;');
imagepng($image);
imagedestroy($image);
ini_restore ("memory_limit");
}
// 生成二维码
function cre_qrcode($url='',$tmp_qr = ROOT_PATH.'/static/study/qr_code.png'){
vendor('Phcode.phpqrcode');
$errorCorrectionLevel = 3;//容错级别
$matrixPointSize = 10;//生成图片大小
//生成二维码图片
QRcode::png($url, $tmp_qr, $errorCorrectionLevel, $matrixPointSize, 2);
return $tmp_qr;
}
// 把图片转换成 圆形
private function radius_img($imgpath = './public/qrcode/qrcode.jpg', $radius = 0){
$ext = pathinfo($imgpath);
$src_img = null;
switch ($ext['extension']){
case 'jpg':
$src_img = imagecreatefromjpeg($imgpath);
break;
case 'png':
$src_img = imagecreatefrompng($imgpath);
break;
case 'gif':
$src_img = imagecreatefromgif($imgpath);
break;
}
$wh = getimagesize($imgpath);
$w = $wh[0];
$h = $wh[1];
$radius = $radius == 0 ? (min($w, $h) / 2) : $radius;
$img = imagecreatetruecolor($w, $h);
//这一句一定要有
imagesavealpha($img, true);
//拾取一个完全透明的颜色,最后一个参数127为全透明
$bg = imagecolorallocatealpha($img, 255, 255, 255, 127);
imagefill($img, 0, 0, $bg);
$r = $radius; //圆 角半径
for ($x = 0; $x < $w; $x++){
for ($y = 0; $y < $h; $y++){
$rgbColor = imagecolorat($src_img, $x, $y);
if (($x >= $radius && $x <= ($w - $radius)) || ($y >= $radius && $y <= ($h - $radius))){
//不在四角的范围内,直接画
imagesetpixel($img, $x, $y, $rgbColor);
}else{
//在四角的范围内选择画
//上左
$y_x = $r; //圆心X坐标
$y_y = $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))){
imagesetpixel($img, $x, $y, $rgbColor);
}
//上右
$y_x = $w - $r; //圆心X坐标
$y_y = $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))){
imagesetpixel($img, $x, $y, $rgbColor);
}
//下左
$y_x = $r; //圆心X坐标
$y_y = $h - $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))){
imagesetpixel($img, $x, $y, $rgbColor);
}
//下右
$y_x = $w - $r; //圆心X坐标
$y_y = $h - $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))){
imagesetpixel($img, $x, $y, $rgbColor);
}
}
}
}
return $img;
}
/**
* 异步将远程链接上的内容(图片或内容)写到本地
* @param unknown $url 远程地址
* @param unknown $saveName保存在服务器上的文件名
* @param unknown $path保存路径
* @return boolean
*/
function put_file_from_url_content($url='',$path='/static/study/user_temp') {
//方法一：//推荐用该方法
$header = array(
'User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0',
'Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
'Accept-Encoding: gzip, deflate',);
// $url='http://wx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKkGpNuUhaBniatRsiaG7ksqmhUWzkk40kTRS6icQS7kJcsfxcibQo7vDFcKibr7NHb9YIXiaXsEtLcdL6A/0';
$curl = curl_init();curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
$data = curl_exec($curl);
$code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
curl_close($curl);
if ($code == 200) {//把URL格式的图片转成base64_encode格式的！
$imgType = 'image/jpeg';
if(function_exists('get_headers')){
$imghttp = get_headers($url,true);
$imgType = $imghttp['Content-Type'];
};
$imgBase64Code = "data:{$imgType};base64," . base64_encode($data);
$img_content = $imgBase64Code;//图片内容
if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $img_content, $result)) {
$type = $result[2];//得到图片类型png?jpg?gif?
if($type == 'jpeg'){
$type = 'jpg';
}
$path = "{$path}.{$type}";
if (file_put_contents($path, base64_decode(str_replace($result[1], '', $img_content)))) {
return $path;
}
}
}
return false;
}
}
注意 背景图片，字体，二维码图片，头像图片都必须先存在
