content type image jpeg

: This article mainly introduces how to use PHP to generate dynamic images. For more information about PHP tutorials, see. Many people do not know that php can generate non-HTML data. this is very useful for generating image graphs. it can generate

When reading images using the readfile function, I plan to display images on a page, instead of directly providing the scr of img, but input by a readfile function, which is equivalent to reading images and outputting them by the server. the

PHP100 is the first professional website in China to share PHP resources. It also provides a PHP Chinese communication community. For PHP study researchers: The latest PHP information, original content, open source code and PHP video tutorials and

Creates and returns a text data stream and applies various options. it can be used in special procedures such as timeout setting, proxy server, request method, and header information setting for fopen () and file_get_contents. Purpose: Create and

The implementation code of the image text watermark and thumbnail in php. For more information, see. ImageCreateFrom * image loading function // Image with different suffix

The class that uses PHP to dynamically generate a verification code is found in the LAMP book. I felt like I was writing well and I added my favorites to my favorites. The following figure shows that the interference code is not enabled. The

PHP verification code. For more information, see. The checkcode. php generates the verification code image and the variable $ _ SESSION [check_pic]. The code is as follows: Session_start ();For ($ I = 0; $ I $ Rand. = dechex (rand (1, 15 ));}$ _

PHP only sends the HTML document header to the browser using the HTTP protocol to tell the browser how to handle the page. As for the transmitted content, you need to familiarize yourself with the HTTP protocol, PHP is irrelevant. in php, the header

The PHP version of the website cache to speed up the opening of the way to share, the need for friends can refer to the following instructions: 1. the compressed files are cached on the server, and the re-access reduces the re-compression time to

PHP and Nginx support dynamic image cropping. I wrote an article about the high-performance PHP image dynamic cropping solution a long time ago. The article uses nginxCache and rewrite for implementation. of course, with CDN, that solution has a

Set the width and height, and scale proportionally; set the width and proportional scaling; set the height and proportional scaling; scale to 50% according to the scale; output directly to the screen after scaling, etc, the specific use of the

Convert the GB code to UTF8. in php (as the mainstream development language), TTF supports UTF8 encoded non-ASCII characters. after analyzing this code, we found that the image can be output in combination with Chinese characters and ASCII

Create a verification code (Network tree comment ). 1. use the for loop to generate random numbers. Use a random function to generate a random number within the specified range. For example, rand () generates numbers between 1 and 15. Use a

Use the gd library to crop and generate thumbnails on the php server. Cropping example: The final cropped image. in the dotted box, the cropped image is saved as a 100-width image. The code is as follows: Copy the code as follows: $ src_path

$authnum = "; $ychar = "0,1,2,3,4,5,6,7,8,9,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 (",", $ychar);//Split function for ($i =0; $i $randnum =rand (0,35); $authnum. = $list

1. use the for loop to generate random numbers. Use a random function to generate a random number within the specified range. For example, rand () generates numbers between 1 and 15. Use a hexadecimal function to create numbers and letters. Dechex

The following is the verification code generated. The result is tested on this site by the programmer. no error is reported. If there is something you don't understand, you can reply. the programmer will explain what you don't know. I hope I will

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Phpgd library for server-side image cropping and thumbnails For example, image cropping in php mainly uses the imagecopyresampled method of the gd Library. Image cropping example:The final cropped image:In the dotted box, the cropped image

How to resize images on the server Adjusting the image size on the server side is much better than processing the image on the browser.This article describes how to adjust the image size on the server side of PHP.The code consists of two