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If I have this in my main php file (eg. my controller)
$debate['title'] = NULL;
And this in my template file (eg. my views file), where I can include PHP with my HTML. Imagine that I'm using a template engine or PHP as a templating engine.
<?=$debate['title'];?>
Note the= after the<? that makes it a shorthand way to include php variables and array keys in my template, to be shown on an HTML web page.
Well now in PHP 7.4 onwards, if$debate['title'] is null, I get this error. (That's if thenotice severity level of errors is setup to be displayed on your screen.)
Message: Trying to access array offset on value of type null
I know that Stack Overflow would want me to useisset() but using something like
<?php if (isset($debate['title'])) { echo "$debate[title]"; } ?>
It just doesn't have the same ring to it. It's not really shorthand, is it?
There is an operator in PHP(from version 7.0) called null coleascing operator which is denoted by two question marks(??). Null colescing operator can be helpful in your case. For example, you can simply write this code as below:
<?= $debate['title'] ?? '' ?>
which is equavalent to writing:
<?= isset($debate['title']) ? $debate['title'] : '' ?>
Hope this helps.
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PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/
HTML (English "hyper text markup language" - hypertext markup language) is a special markup language that is used to create sites on the Internet.
Browsers understand html perfectly and can interpret it in an understandable way. In general, any page on the site is html-code, which the browser translates into a user-friendly form. By the way, the code of any page is available to everyone.
https://www.w3.org/html/
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