PHP makes sharing pictures function-PHP Tutorial-php.cn

This time I will bring you the function of sharing pictures in PHP. What are the precautions on how to use the function of sharing pictures in PHP? The following is a practical case, let’s take a look.

Recent work requirements require the generation of shared images. Initially, there were various problems with the html2canvas screenshot plug-in of js. Later, the PG library of PHP was used to generate images in the background. Various problems were happily solved and the effect we wanted to achieve was achieved. As shown below:

Assume that the resource folder used in the code is in the current code_png directory:

php code:

/** 
 * 分享图片生成 
 * @param $gData 商品数据，array 
 * @param $codeName 二维码图片 
 * @param $fileName string 保存文件名,默认空则直接输入图片 
 */ 
function createSharePng($gData,$codeName,$fileName = &#39;&#39;){ 
  //创建画布 
  $im = imagecreatetruecolor(618, 1000); 
 
  //填充画布背景色 
  $color = imagecolorallocate($im, 255, 255, 255); 
  imagefill($im, 0, 0, $color); 
 
  //字体文件 
  $font_file = "code_png/msyh.ttf"; 
  $font_file_bold = "code_png/msyh_bold.ttf"; 
 
  //设定字体的颜色 
  $font_color_1 = ImageColorAllocate ($im, 140, 140, 140); 
  $font_color_2 = ImageColorAllocate ($im, 28, 28, 28); 
  $font_color_3 = ImageColorAllocate ($im, 129, 129, 129); 
  $font_color_red = ImageColorAllocate ($im, 217, 45, 32); 
 
  $fang_bg_color = ImageColorAllocate ($im, 254, 216, 217); 
 
  //Logo 
  list($l_w,$l_h) = getimagesize(&#39;code_png/logo100_100.png&#39;); 
  $logoImg = @imagecreatefrompng(&#39;code_png/logo100_100.png&#39;); 
  imagecopyresized($im, $logoImg, 274, 28, 0, 0, 70, 70, $l_w, $l_h); 
 
  //温馨提示 
  imagettftext($im, 14,0, 100, 130, $font_color_1 ,$font_file, &#39;温馨提示：喜欢长按图片识别二维码即可前往购买&#39;); 
 
  //商品图片 
  list($g_w,$g_h) = getimagesize($gData[&#39;pic&#39;]); 
  $goodImg = createImageFromFile($gData[&#39;pic&#39;]); 
  imagecopyresized($im, $goodImg, 0, 185, 0, 0, 618, 618, $g_w, $g_h); 
 
  //二维码 
  list($code_w,$code_h) = getimagesize($codeName); 
  $codeImg = createImageFromFile($codeName); 
  imagecopyresized($im, $codeImg, 440, 820, 0, 0, 170, 170, $code_w, $code_h); 
 
  //商品描述 
  $theTitle = cn_row_substr($gData[&#39;title&#39;],2,19); 
  imagettftext($im, 14,0, 8, 845, $font_color_2 ,$font_file, $theTitle[1]); 
  imagettftext($im, 14,0, 8, 875, $font_color_2 ,$font_file, $theTitle[2]); 
 
  imagettftext($im, 14,0, 8, 935, $font_color_2 ,$font_file, "券后价￥"); 
  imagettftext($im, 28,0, 80, 935, $font_color_red ,$font_file_bold, $gData["price"]); 
  imagettftext($im, 14,0, 8,970, $font_color_3 ,$font_file, "现价￥".$gData["original_price"]); 
 
  //优惠券 
  if($gData[&#39;coupon_price&#39;]){ 
    imagerectangle ($im, 125 , 950 , 160 , 975 , $font_color_3); 
    imagefilledrectangle ($im, 126 , 951 , 159 , 974 , $fang_bg_color); 
    imagettftext($im, 14,0, 135,970, $font_color_3 ,$font_file, "券"); 
 
    $coupon_price = strval($gData[&#39;coupon_price&#39;]); 
    imagerectangle ($im, 160 , 950 , 198 + (strlen($coupon_price)* 10), 975 , $font_color_3); 
    imagettftext($im, 14,0, 170,970, $font_color_3 ,$font_file, $coupon_price."元"); 
  } 
 
  //输出图片 
  if($fileName){ 
    imagepng ($im,$fileName); 
  }else{ 
    Header("Content-Type: image/png"); 
    imagepng ($im); 
  } 
 
  //释放空间 
  imagedestroy($im); 
  imagedestroy($goodImg); 
  imagedestroy($codeImg); 
} 
 
/** 
 * 从图片文件创建Image资源 
 * @param $file 图片文件，支持url 
 * @return bool|resource  成功返回图片image资源，失败返回false 
 */ 
function createImageFromFile($file){ 
  if(preg_match(&#39;/http(s)?:\/\//&#39;,$file)){ 
    $fileSuffix = getNetworkImgType($file); 
  }else{ 
    $fileSuffix = pathinfo($file, PATHINFO_EXTENSION); 
  } 
 
  if(!$fileSuffix) return false; 
 
  switch ($fileSuffix){ 
    case &#39;jpeg&#39;: 
      $theImage = @imagecreatefromjpeg($file); 
      break; 
    case &#39;jpg&#39;: 
      $theImage = @imagecreatefromjpeg($file); 
      break; 
    case &#39;png&#39;: 
      $theImage = @imagecreatefrompng($file); 
      break; 
    case &#39;gif&#39;: 
      $theImage = @imagecreatefromgif($file); 
      break; 
    default: 
      $theImage = @imagecreatefromstring(file_get_contents($file)); 
      break; 
  } 
 
  return $theImage; 
} 
 
/** 
 * 获取网络图片类型 
 * @param $url 网络图片url,支持不带后缀名url 
 * @return bool 
 */ 
function getNetworkImgType($url){ 
  $ch = curl_init(); //初始化curl 
  curl_setopt($ch, CURLOPT_URL, $url); //设置需要获取的URL 
  curl_setopt($ch, CURLOPT_NOBODY, 1); 
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);//设置超时 
  curl_setopt($ch, CURLOPT_TIMEOUT, 3); 
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); //支持https 
  curl_exec($ch);//执行curl会话 
  $http_code = curl_getinfo($ch);//获取curl连接资源句柄信息 
  curl_close($ch);//关闭资源连接 
 
  if ($http_code[&#39;http_code&#39;] == 200) { 
    $theImgType = explode(&#39;/&#39;,$http_code[&#39;content_type&#39;]); 
 
    if($theImgType[0] == &#39;image&#39;){ 
      return $theImgType[1]; 
    }else{ 
      return false; 
    } 
  }else{ 
    return false; 
  } 
} 
 
/** 
 * 分行连续截取字符串 
 * @param $str 需要截取的字符串,UTF-8 
 * @param int $row 截取的行数 
 * @param int $number  每行截取的字数，中文长度 
 * @param bool $suffix 最后行是否添加‘...&#39;后缀 
 * @return array  返回数组共$row个元素，下标1到$row 
 */ 
function cn_row_substr($str,$row = 1,$number = 10,$suffix = true){ 
  $result = array(); 
  for ($r=1;$r<=$row;$r++){ 
    $result[$r] = &#39;&#39;; 
  } 
 
  $str = trim($str); 
  if(!$str) return $result; 
 
  $theStrlen = strlen($str); 
 
  //每行实际字节长度 
  $oneRowNum = $number * 3; 
  for($r=1;$r<=$row;$r++){ 
    if($r == $row and $theStrlen > $r * $oneRowNum and $suffix){ 
      $result[$r] = mg_cn_substr($str,$oneRowNum-6,($r-1)* $oneRowNum).&#39;...&#39;; 
    }else{ 
      $result[$r] = mg_cn_substr($str,$oneRowNum,($r-1)* $oneRowNum); 
    } 
    if($theStrlen < $r * $oneRowNum) break; 
  } 
 
  return $result; 
} 
 
/** 
 * 按字节截取utf-8字符串 
 * 识别汉字全角符号，全角中文3个字节，半角英文1个字节 
 * @param $str 需要切取的字符串 
 * @param $len 截取长度[字节] 
 * @param int $start  截取开始位置，默认0 
 * @return string 
 */ 
function mg_cn_substr($str,$len,$start = 0){ 
  $q_str = &#39;&#39;; 
  $q_strlen = ($start + $len)>strlen($str) ? strlen($str) : ($start + $len); 
 
  //如果start不为起始位置，若起始位置为乱码就按照UTF-8编码获取新start 
  if($start and json_encode(substr($str,$start,1)) === false){ 
    for($a=0;$a<3;$a++){ 
      $new_start = $start + $a; 
      $m_str = substr($str,$new_start,3); 
      if(json_encode($m_str) !== false) { 
        $start = $new_start; 
        break; 
      } 
    } 
  } 
 
  //切取内容 
  for($i=$start;$i<$q_strlen;$i++){ 
    //ord()函数取得substr()的第一个字符的ASCII码，如果大于0xa0的话则是中文字符 
    if(ord(substr($str,$i,1))>0xa0){ 
      $q_str .= substr($str,$i,3); 
      $i+=2; 
    }else{ 
      $q_str .= substr($str,$i,1); 
    } 
  } 
  return $q_str; 
} 
 
 
//使用方法------------------------------------------------- 
//数据格式，如没有优惠券coupon_price值为0。 
$gData = [ 
  &#39;pic&#39; => &#39;code_png/nv_img.jpg&#39;, 
  &#39;title&#39; =>&#39;chic韩版工装羽绒棉服女冬中长款2017新款棉袄大毛领收腰棉衣外套&#39;, 
  &#39;price&#39; => 19.8, 
  &#39;original_price&#39; => 119.8, 
  &#39;coupon_price&#39; => 100 
]; 
//直接输出 
createSharePng($gData,&#39;code_png/php_code.jpg&#39;); 
//输出到图片 
createSharePng($gData,&#39;code_png/php_code.jpg&#39;,&#39;share.png&#39;);

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!