content type image jpeg

GD library functions1, imagecreatetruecolor ----- create a true color imageImagecreatetruecolor (int x_size, int y_size) // x indicates width, and y indicates height.2. imagecolorallocate allocates color to an image (color palette)Imagecolorallocate

I posted it before, but the above is just one, which is not easy for everyone to copy and use. So I will repost it here .? Php generates the verification code image Header (Content-type: imageJPEG); srand (double) microtime () * 1000000); $

There are two ways to change the image size.(1): The ImageCopyResized () function is valid in all GD versions, but its algorithm for scaling images is rough.(2): ImageCopyResampled (), the edge of the image obtained by the pixel interpolation

As follows:Copy codeThe Code is as follows:// Define the EncodingHeader ('content-Type: text/html; charset = UTF-8 ');// AtomHeader ('content-type: application/atom + xml ');// CSSHeader ('content-type: text/css ');// JavascriptHeader ('content-type:

Text watermark:Copy codeThe Code is as follows:$ W = 80;$ H = 20;$ Im = imagecreatetruecolor ($ w, $ h );$ Textcolor = imagecolorallocate ($ im, 123, 12,255 );$ White = imagecolorallocate ($ im, 255,255,255 );$ Gray = imagecolorallocate ($ im, 128,12

First, we will introduce a self-written function.Copy codeThe Code is as follows:$ Imgsrc = "http://www.nowamagic.net/images/3.jpg ";$ Width = 780;$ Height = 420;Resizejpg ($ imgsrc, $ imgdst, $ width, $ height );Function resizejpg ($ imgsrc, $

Changing the size of an image is a common functional requirement. next we will study how to change the size of an image in PHP. First, we will introduce a self-written function. Copy codeThe code is as follows: $ Imgsrc = "http://www.nowamagic.net/

Modify Upload image? & Lt; tr & gt; & nbsp; & lt; tdwidth & quot; 15% & quot; & gt; select the image address: & lt; td & gt; & nbsp; & lt; tdwidth & quot; 85% & quot; & gt; & lt; inputtype & quot; file & quot; name & quot; myphoto & quot; & g modify

Setting common content-type sorting php header functions setting content-type // Define the encoding headers ('content-Type: text/html; charset = utf-8 '); // Atomheader ('content-type: application/atom + XML '); // CSSheader ('content-type:

Php5 image verification code. For more information, see. GD library functions 1, imagecreatetruecolor ----- create a true color image Imagecreatetruecolor (int x_size, int y_size) // x indicates width, and y indicates height. 2. imagecolorallocate

PHP image verification code creation example $ Authnum = ''; $ Ychar = ", A, B, C, D, E, F, G, H, I, J, K, L, M, n, O, P, Q, R, S, T, U, V, W, X, Y, Z "; $ List = explode (",", $ ychar); // delimiter

Example of setting various HTTP headers using the header function in php /** Desc: header function to set various HTTP headers Link: bbs.it-home.org Date: */ // Define the encoding

Summary of common methods for PHPheader () functions. Definition code copy code: header (Content-Type: texthtml; charsetutf-8); Atom copy code: header (Content-type: applicationatom + xml ); CSS copy // define the encoding The code is as

In fact, this leads to the problem of server output control and browser cache, which is a bit complicated and will be studied again later. When uploading and generating a thumbnail, the link displayed by the thumbnail is as follows; The code is as

PHP batch image scaling preview question? 1. read the image from a folder. & Nbsp; 2 read the image to the memory, scale according to a certain algorithm, and generate a $ image object. 3. create a form next to each image, enter the image name,

Php image text watermark instance code Using imgw.'22.jpg '; $ Arr = getimagesize ($ img ); // Print_r ($ arr); // $ arr [0] indicates the image width, $ arr [1] indicates the image height, and $ arr

Php image verification code multiple instances // File header... Header ("Content-type: image/png "); // Create white paper with true color $ Im = @ imagecreatetruecolor (50, 20) or die ("image

Php uses the header to set content-type and content-type of common file types. in PHP, you can use the header function to send header information, or set the content-type of the file, the following describes the content-type values of common file

This article mainly introduces common methods of PHPheader () functions and summarizes common usage. For more information, see // coding. The code is as follows: header ('content-Type: text/html; charset = utf-8 '); // Atom The code is as

PHP-Push technology implements the refresh function. repost the "Push" technology, which was very popular some time ago before Serverpush. However, most of the information on the Internet is cgi, occasionally, I see this introduction on a French