我们做web系统的时候，每个浏览器的tab这里都会有一个图标，这个图标叫favicon图标，favicon.ico文件放在系统的根目录
如果程序员没有ICO制作工具，那么要如何生成图标呢？可以用程序来实现生成啊！也可以把图标裁剪好，选择在线生成，在线生成测试地址：www.vsoyo.com/ico
下面和大家一起探讨下，php生成ICO图标在线制作源码，很简单的原理，请看如下代码
下面是ICO图标在线生成的主要代码
<?phpif(!function_exists("generate_favicon")){function generate_favicon(){ ???// Create favicon. ???$postvars = array( ???????"image" ????????????=> trim($_FILES["image"]["name"]), ???????"image_tmp" ???????????=> $_FILES["image"]["tmp_name"], ???????"image_size" ???????=> (int)$_FILES["image"]["size"], ???????"image_dimensions" ???=> (int)$_POST["image_dimensions"]); ???// Provide valid extensions and max file size ???$valid_exts = array("jpg","jpeg","gif","png"); ???$max_file_size = 179200; // 175kb ???$filenameParts = explode(".",$postvars["image"]); ???$ext = strtolower(end($filenameParts)); ???$directory = "./favicon/"; // Directory to save favicons. Include trailing slash. ???$rand = rand(1000,9999); ???$filename = $rand.$postvars["image"]; ???// Check not larger than max size. ???if($postvars["image_size"] <= $max_file_size){ ???????// Check is valid extension. ???????if(in_array($ext,$valid_exts)){ ???????????if($ext == "jpg" || $ext == "jpeg"){ ???????????????$image = imagecreatefromjpeg($postvars["image_tmp"]); ???????????} ???????????else if($ext == "gif"){ ???????????????$image = imagecreatefromgif($postvars["image_tmp"]); ???????????} ???????????else if($ext == "png"){ ???????????????$image = imagecreatefrompng($postvars["image_tmp"]); ???????????} ???????????if($image){ ???????????????list($width,$height) = getimagesize($postvars["image_tmp"]); ???????????????$newwidth = $postvars["image_dimensions"]; ???????????????$newheight = $postvars["image_dimensions"]; ???????????????$tmp = imagecreatetruecolor($newwidth,$newheight); ???????????????????????????????????// Copy the image to one with the new width and height. ???????????????imagecopyresampled($tmp,$image,0,0,0,0,$newwidth,$newheight,$width,$height); ???????????????????????????// Create image file with 100% quality. ???????????????if(is_dir($directory)){ ???????????????????if(is_writable($directory)){ ???????????????????????imagejpeg($tmp,$directory.$filename,100) or die(‘Could not make image file‘); ???????????????????????if(file_exists($directory.$filename)){ ???????????????????????????????// Image created, now rename it to its ???????????????????????????$ext_pos = strpos($rand.$postvars["image"],"." . $ext); ???????????????????????????$strip_ext = substr($rand.$postvars["image"],0,$ext_pos); ???????????????????????????// Rename image to .ico file ???????????????????????????rename($directory.$filename,$directory.$strip_ext.".ico"); ???????????????????????????return ‘<strong>图标预览:</strong><br/> ???????????????????????????<img src="‘.$directory.$strip_ext.‘.ico" border="0" title="Favicon 完毕预览" style="padding: 4px 0px 4px 0px;background-color:#e0e0e0" /><br/> ???????????????????????????Favicon/ICO图标制作完毕： <a href="‘.$directory.$strip_ext.‘.ico" target="_blank" name="右键另存为下载!">点击/右键另存下载，后重命名为"favicon.ico"</a>‘; ???????????????????????} else { ???????????????????????????"File was not created."; ???????????????????????} ???????????????????} else { ???????????????????????return ‘The directory: "‘.$directory.‘" is not writable.‘; ???????????????????} ???????????????} else { ???????????????????return ‘The directory: "‘.$directory.‘" is not valid.‘; ???????????????} ???????????????????????????imagedestroy($image); ???????????????imagedestroy($tmp); ???????????} else { ???????????????return "Could not create image file."; ???????????} ???????} else { ???????????return "图标过大，不能超过175KB"; ???????????} ???} else { ???????return "图片格式只能是后面几种 (jpg, jpeg, gif, png)."; ???????}}}?>需要进一步技术交流的朋友 ，请加我微信吧：15889726201
ICO图标在线生成，php生成ICO图标在线制作源码
原文地址：https://www.cnblogs.com/keleyu/p/9447835.html