http://www.php.net/quickref.php
There are thousands.
By sending messages to the MySQL server, you can communicate with the database. To submit SQL queries to the database, you use PHP functions. You don't need to know how to communicate with MySQL because PHP takes care of that. You only need to be familiar with SQL queries and PHP functions. To learn more about data science please visit- Learnbay.co
See the related links for a shortcut to the entire reference of every function in PHP. The default built-in functions differ from the categories of extensions you choose to install, and the version of PHP you're installing - therefore, it's impossible to give a stable list of built-in functions.
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One can find a manual for the PHP mail functions on the PHP Mail website. One can read it online or print it out to read as a hard copy. The manual is also available on the 'NuSphere' website.
PHP 6 hasn't been released yet.
PHP is related with HTML. HTML can be included into PHP script as well as PHP script can be included into HTML code. PHP begins and ends with <?php ?>. PHP is mix of few languages so semantics is mixed too.
PHP data coding is softwares that allows or has frameworks which can make PHP input to it's own script language. So you may code programs for example with PHP, just that it has to be extended PHP because of new functions and features. It may also be application coding for the web.
A framework in PHP is a set of prebuilt classes and functions (like cakePHP.org or codeignitor) that let's you add basic classes and write less do more.
if i got your question right, you mean "what are php tags?" your should write PHP codes between <?php ... ?> where ... should be replaced by codes that you need. But if you mean "what are php codes?": there are some default codes that you may find them on php.net, and the other part is codes (Functions or classes) that other programmers develops..
Use the preg functions (ereg functions are deprecated) Wiki regex to form your regex string
I have had a lot of experience with image modification modules with PHP. In order to perform image manipulation in PHP you need an image processing module installed such as GD2 or imagemagik. GD2 comes with PHP and can be installed fairly easily if it is not already installed. You can follow the PHP GD manually for the usage of these functions.