Summary of various methods for php to determine image formats

Source: Internet
Author: User

The following describes how to determine the image format in php:

The first method is to treat the image path as a string, so the image format is changed to a string for searching for a. Number.

The code is as follows: Copy code

$ File = "test.jpg ";

$ Filetype = strtolower (strrchr ($ file ,"."));

$ Arrtype = array (". jpeg", ". bmp", ". gif", ". jpg ");

If (! In_array ($ filetype, $ arrtype ))
Echo 'invalid format ';



Getimagesize is used to obtain the image size format. This is not a function of the gd class library. This method is very classic. It can be used to determine the image format and obtain the image length and width.

An example is as follows:

The code is as follows: Copy code
$ Array = getimagesize ("images/flower_1.jpg ");
Print_r ($ array );

The return value of this function is an array with the following content:

The code is as follows: Copy code
[0] = & gt; 350
[1] => 318.
[2] => 2
[3] => width = "350 & Prime; height =" 318 & Prime;
[Bits] => 8
[Channels] => 3
[Mime] => image/jpeg
Related Article

E-Commerce Solutions

Leverage the same tools powering the Alibaba Ecosystem

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.