htmlentities | simple library to facilitate encoding

I keep thinking I have come up with the perfect function to tackle my problem, but I eventually find something that breaks it for no apparent reason. I don't fully understand how htmlentities / htmlspecialchars works, or what exactly they convert, so I suppose that would help...

I have a mixture of old and new databases, and user-input

1. • Old databases sometimes characters are encoded with htmlentities() inside the data
   • Old databases occasionally contain HTML within content (need stripping)
   • New databases characters are not encoded before insertion
2. • User input could include nasty

I created a couple of script that backup my website, the script so are divided in two files:

backup.php (that perform the backup and then redirect to index.php)

index.php (that call the file backup.php and after show the backups)

I'd like to configure a way to keep the last X (3, 4, etc) backups to keep and at the same time deleting the oldest.

I'm using glob, filemtime, array_multisort(array_map('filemtime', $backups), SORT_NUMERIC, SORT_DESC, $backups), unlink.

So the first files are the most recent.

backup.php:

I'm trying to create a php to do list using cookies, however am struggling to store the cookie inside an array so that I can add more than one cookie.

When I submit the form, a cookie is added, but when I go to add another the first one is replaced.

I want to store the cookie in a variable, push it to an array then save it to the end of the list rather than replace the current cookie.

Here is the code I have so far:

I have a problem with the error message "Trying to access array offset on the value of type int" I use PHP version 7.4, as I see on the web :

Array-style access of non-arrays

bool, int, float or resource as an array (such as $null["key"]) will now generate a notice.

Code is:

I am making a table to show details from a SQL table but it looks very over congested can someone help me in making the table look neater with distinct borders

I have a loop in PHP that did not really end up like I wanted to since i am not experienced with PHP and could not figure out. I want to repeat a loop to show every post for each category which have tables called "tblcategories" and "tblposts". I want to do 2 categories per row with 2posts each but did not even manage to do more than a single category. Here is the UPDATED code:

Currently, I am trying to create an "add" form on PHP for one of my assignments in order for users to insert data into a database that will be displayed in a table on page index.php. The issue is that when I click to submit the form, the page refreshes and ends up not adding any data to the database at all. There are also no errors displayed after submitting. I believe the database is connected as the users in the database do appear in the table in index.php however those were already added through phpMyAdmin itself. I am completely stuck as I've tried searching on google and still haven't found a possible solution for this issue. Below is my code for both index.php and add.php. I am still a beginner especially when it comes to PHP. Please do let me know if I need to provide any other additional code to fix this issue. Thank you in advance!

add.php

I am saving the content of the tinymce editor in MySQL table, and would like to paste the same content that I have retrieved from the database back in the editor.
I use the htmlentities() function to encode the input, save it into the database and then decode the content with html_entity_decode() before displaying it.
post); ?> will output:

I am trying to convert string to seo friendly url. For this I have written below code and set the table column collation type to utf8_general_ci It is working for English but not working for Bengali Language. Just outputting single hypen(-) for bengali string