Validate if correct image url php

If you want to be absolutely sure, and your PHP is enabled for remote 
connections, you can just use "getimagesize('url')"

function validImage($url) {
   return stripos(getimagesize($url)['mime'], 'image') === 0;
}

$image = validImage('http://www.example.com/image.jpg');

If it returns an array, it is an image type recognized by PHP, even if the 
image extension is not in the url (per your second link). You have to keep in
mind that this method will make a remote connection for each request, so 
perhaps cache urls that you already probed in a database to lower connections.

Similar codes

0 vote206 views1 answer
Return only one column data from table in codeigniter
PHP CodeIgniter
6 votes163 views4 answers
Laravel spatie asigne role
PHP Laravel
1 vote150 views1 answer
Unable to call component method. Public method [gotoPage] not found on component
PHP
4 votes150 views2 answers
Laravel please provide a valid cache path
PHP
0 vote142 views1 answer
Validate unique or equal
PHP
2 votes175 views2 answers
How to get match date and month in php
PHP
0 vote142 views1 answer
Php filter non utf-8 characters
PHP
15 votes171 views6 answers
Get last character of string php
PHP
1 vote145 views1 answer
Php artisan storage:link not working
PHP
6 votes171 views4 answers
Laravel previous url
PHP Laravel