PHP输出图片

PHP

<?php
$imgArr[] = "http://image.apidata.vip/blog/type/2020-04-30/158825027497343212.jpg";
$imgArr[] = "http://image.apidata.vip/blog/type/2020-04-30/158824995423596172.png";
$imgArr[] = "http://image.apidata.vip/blog/type/2020-04-30/15882498713244952.png";
$imgArr[] = "http://image.apidata.vip/blog/type/2020-04-30/158824975631129892.png";
//创建并载入一幅图像
$imgKey = mt_rand(0,count($imgArr)-1);
$img = $imgArr[$imgKey];
$dis = strtolower(substr($img, strrpos($img, ".")+1));
// 获取mime类型
$image = exif_imagetype($img);
$mime_type = image_type_to_mime_type($image);
header("Content-type: {$mime_type}");
if ($dis == "jpg") {
    $im = @ImageCreateFromJPEG($imgArr[$imgKey]);
} else if ($dis == "png") {
    $im = @ImageCreateFromPNG($imgArr[$imgKey]);
} else if ($dis == "gif") {
    $im = @ImageCreateFromGIF($imgArr[$imgKey]);
}
//错误处理
if(!$im){
    $im  = imagecreatetruecolor(150, 30);
    $bg = imagecolorallocate($im, 255, 255, 255);
    $text_color  = imagecolorallocate($im, 0, 0, 255);
    //填充背景色
    imagefilledrectangle($im, 0, 0, 150, 30, $bg);
    //以图像方式输出错误信息
    imagestring($im, 3, 5, 5, "Error loading image", $text_color);
} else {
    //输出该图像
    imagejpeg($im);
}

html 页面调用

<img src="/jpg.php" alt="" width="200" height="200">