Detailed introduction and usage of filetype function

Sometimes we do this imperfectly. Some people may save some files on their computer, but they change the extension so that they fall within our file type. It cannot be displayed during actual access (because the extension does not match the file content). The following php class may be able to help us. 1. PHP detection class First of all, let me explain that the above mapping relationship between file headers and file types comes from the Internet. If you have new files to check, you only need to add the mapping. If you need to know the file header information, you can open the standard file and search it through the tool: winhex. For example: Code: Copy the code as follows: _getFileType($filename); } } How to get the header bytecode: You can see: png file, the header is 4 bytes (you need to check the relevant information yourself for how many bytes the header mark is) OK), the corresponding is: 89504E47 If you are not very familiar with PHP's pack unpack, you can check: PHP park, unpark, ord function usage (binary stream interface application example) Calling example: Copy the code as follows: $filename=&qu

1. 10 recommended articles about the php GetFiletype() function

##Introduction: Sometimes we do this imperfectly. Some people may save some files on their computer, but they change the extension so that they fall within our file type. It cannot be displayed during actual access (because the extension does not match the file content). The following php class may be able to help us. 1. PHP detection class First of all, let me explain that the above mapping relationship between file headers and file types comes from the Internet. If you have new files to check, you only need to add the mapping. If you need to know the file header information, you can open the standard file and search it through the tool: winhex. Such as: Code: Copy...

2. Recommended 10 articles about the php filetype() function

Introduction: stat(), lstat(), file_exists(), is_writable(), is_readable(), is_executable(), is_file(), is_dir(), is_link(), filectime(), fileatime(), filemtime(), fileinode(), filegroup(), fileowner(), filesize(), filetype(), fi...

3. A function to get the file extension (but the function name is called FILETYPE! Haha!)_PHP tutorial

Introduction: A function to get the file extension function (but the function name is called Get FILETYPE! Haha!). ? /* GetFileType usage: GetFiletype($filename) */ function GetFiletype($Filename) { if (substr_count($Filename, .) == 0) {// Check whether there is a . number in the file name. return; // Return empty

4. dedecms prompts Upload filetype not allow_PHP tutorial

Introduction when uploading image files : dedecms prompts Upload filetype not allow when uploading image files. If you know a little English, you will know that Upload filetype not allow means that the file type you uploaded is not allowed, but I uploaded a picture. How can I not upload it? Later, I searched for the reason

5. The solution to the UPLOAD FILETYPE NOT ALLOW error when dedeCMS uploads pictures_PHP Tutorial

Introduction: The solution to the UPLOAD FILETYPE NOT ALLOW error when dedeCMS uploads pictures . I recently installed the official dedecms version 5.7 program, but I discovered a problem when publishing an article. When uploading pictures through the editor during the publishing process, the pictures were not uploaded.

6. How can PHP confirm whether it supports filetype?

Introduction: How can PHP confirm whether it supports filetype?

7. How can PHP confirm whether it supports filetype?

##

Introduction: How can I confirm whether PHP supports filetype? It stands to reason that the filetype in this place should have a different color, but I don’t know why the color is still black here. I don’t know where I made the mistake. Paste the code.

8. Please tell me how to use PHP Confirm whether filetype is supported

##Introduction: How can I confirm whether filetype is supported in PHP? Click Logically speaking, the filetype here should have a different color, but I don’t know why the color is still black here. I don’t know where I made the mistake. Paste the code<

dedecms prompts Upload filetype not allow## when uploading image files #Introduction: dedecms prompts Upload filetype not allow when uploading image files. If you know a little English, you will know that Upload filetype not allow means that the file type you uploaded is not allowed, but I uploaded a picture. How can I not upload it? Later, I searched for the reason

10.

Introduction: The solution to the UPLOAD FILETYPE NOT ALLOW error when dedeCMS uploads pictures. I recently installed the official dedecms version 5.7 program, but I discovered a problem when publishing an article. When uploading pictures through the editor during the publishing process, the pictures were not uploaded.

11.

Introduction:

12.

Introduction:?php/*GetFileType Usage: GetFiletype($filename)*/ functionGetFiletype($Filen...

[Related Q&A recommendations]:

java - uploadify fileTypeDesc does not work, please give me some advice

javascript - The file upload plug-in uploadify does not pop up the file selection box for half a day after clicking the button

linux - Is there a problem with configuring vim syntax highlighting?

ios - XCode creates a new Obj-C class, which can only use classification and cannot be inherited?

Web crawler - python smtp sending email attachment problem