php在图片上增加矩形框并加入水印
php在图片下增加矩形框并加入水印
//统计混合汉字英文字符的实际字符数,只对gb2312码有效 function str_len($str){ $length=0; for($i=0;$i<strlen if>0x80) $i++; $length++; } return $length; } //待添加水印图片 $imagefile = "3.jpg"; //待添加文字 $str = "照片由戈多上传于".date("Y年m月d日H时i分s秒"); //由于掺杂汉字,原生函数无法统计真实字符数,造成水印文字无法居中 //所以自己写了个函数统计,如果有mbstring库支持,换用mb_strlen也可以 $len = str_len($str); //如果源程序基于utf-8编码,不需要做字符转换,删除此行 $str = iconv('gb2312','utf-8',$str); //获取原图大小 $size = getimagesize($imagefile); //底边矩形高度 $bottom_height = 20; //字体大小 $font_size = 10; $im = imagecreatetruecolor($size[0], $size[1]+$bottom_height); //底边矩形背景色,修改最后三个RGB参数改变颜色 $bgcolor = imagecolorallocate($im,100,120,100); //字体颜色 $ftcolor = imagecolorallocate($im,255,255,255); imagefill($im,0,0,$bgcolor); //默认从jpeg创建,如从其他图片创建,可根据扩展名选择函数 $jpeg = imagecreatefromjpeg($imagefile); imagecopy($im,$jpeg,0,0,0,0,$size[0],$size[1]); $start_x = ($size[0]-$len*$font_size)/2; $start_x = ($start_x>0?$start_x:0); $start_y = $size[1]+$font_size+($bottom_height-$font_size)/2; //C:/windows/fonts/SIMHEI.TTF为ttf字库文件,此处为黑体 imagettftext($im,$font_size,0,$start_x,$start_y,$ftcolor,"C:/windows/fonts/SIMHEI.TTF",$str); header("Content-type: image/jpeg"); imagejpeg($im); imageclose($im); imageclose($jpeg); ?> </strlen>
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Use Java's File.length() function to get the size of a file. File size is a very common requirement when dealing with file operations. Java provides a very convenient way to get the size of a file, that is, using the length() method of the File class. . This article will introduce how to use this method to get the size of a file and give corresponding code examples. First, we need to create a File object to represent the file we want to get the size of. Here is how to create a File object: Filef

Solution to docker start failure: 1. Check the running status, and then release the occupied memory through the "echo 3 > /proc/sys/vm/drop_caches" command; 2. Use "$netstat -nltp|grep .. ." command to check whether the port has been occupied. If it is found to be occupied after going online, change it to an available port and restart.

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JPEG is a compression coding standard for continuous-tone still images; it mainly uses a joint coding method of predictive coding, discrete cosine transform and entropy coding to remove redundant images and color data. It is a lossy compression format, which can convert images Compression requires a small storage space and will cause damage to image data to a certain extent.

JPEG is an image format saved using a lossy compression method, and the file extension is ".jpg" or ".jpeg"; as a result of compression, the output image cannot take into account both quality and size. The JPEG format has long been the choice for storing and transmitting photographic images over the web, and almost all operating systems now have viewers that support the visualization of JPEG images, which are also often stored with the JPG extension.

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This article will explain in detail about converting JPEG image files to WBMP image files with PHP. The editor thinks it is quite practical, so I share it with you as a reference. I hope you can gain something after reading this article. Introduction to converting JPEG image files to WBMP image files JPEG (Joint Photographic Experts Group) and WBMP (Wireless Bitmap) are two widely used image file formats. JPEG is used to store high-quality photos and images, while WBMP is used to store simple black-and-white images, commonly used on mobile devices and e-paper displays. This article will guide you to convert JPEG image files to WBMP image files using php. Steps to Install GD Library First, you need to install GD Library, which is a popular PHP

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