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Valeri Tandilashvili's Personal Professional Blog
Results: 1024
preconnect to required origins
Problem: Consider adding 
preconnect
or 
dns-prefetch
resource hints to establish early connections to important third-party origins. For example to pre-connect google analytics: 
https://www.google-analytics.com
we should include 
rel
attribute with 
preconnect
value:
<link rel="preconnect" href="https://www.google-analytics.com" crossorigin>
in 
head
tag
Links do not have a discernible name
Solution to the problem - to use 
aria-label="Twitter"
attribute on 
a
tag
<a href="<?=$hostname?>" aria-label="Sibrdzne" class="bg-logo"></a>
jQuery vulnerabilities
Older version of jQuery library has XSS vulnerabilities (lighthouse) Because of that 
jquery-1.7.2.min.js
was replaced by 
jquery-3.5.1.min.js
noreferrer on links
Links to cross-origin destinations were not safe (
lighthouse
) Advice: Add 
rel="noopener"
or 
rel="noreferrer"
to any external links to improve performance and prevent security vulnerabilities
<a class="a_" rel="noreferrer" href="http://orthodoxy.ge" target="_blank" title="მართლმადიდებლური საიტი orthodoxy.ge">orthodoxy.ge</a>
Links that the 
noreferrer
was used: 
orthodoxy.ge
teodore.ge
qadageba.ge
calculate age based on the provided date of birth 
function age($dob) {
    // Seconds in a year
    $seconds = 31556926;

    // Calc. age based on the provided date_of_birth val
    $age = floor((time() - strtotime($dob)) / $seconds);

    return $age;
}
fields types in mysql table relationships
In 
many to many
relationship 
user_id
inside 
user_roles
table must be exactly the same as the 
id
field inside 
users
table Example: if 
users->id
is 
bigint(20) unsigned
then 
user_role->user_id
must be exactly 
bigint(20) unsigned
create model, resource controller and migration in one go 
php artisan make:model Asset -m -c -r
Long version of the above command would be:
php artisan make:model Asset --migration --controller --resource
create DateTime object using specified date format 
$Datetime_object = DateTime::createFromFormat('Y-m-d', "2020-12-23");
short_open_tag
If we want to use short open tag 
<?
instead of 
<?php
then we must configure 
short_open_tag
setting in 
php.ini
to 
on
<?
echo '"short_open_tag" should be ON if we want to use short tags ' ;
?>
common HTTP response headers
Tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds (example: Cache-Control: max-age=3600``)
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
The type of encoding used on the data
Content-Encoding: gzip
The MIME type of this content
Content-Type: text/html; charset=UTF-8
A name for the server
Server: nginx
The date and time that the message was sent
Date: Fri, 30 Oct 2020 14:42:53 GMT
Gives the date/time after which the response is considered stale
Expires: Thu, 01 Dec 1994 16:00:00 GMT
Results: 1024