Optimize PHP's OPcache configuration
Now that you've optimized PHP realpath_cache_size, it's time to fine-tune PHP OPcache. With just a few tweaks you can tune OPcache to make it perform much better, and here is how! ...
How to add conditional analytics tracking code in WordPress Multisite
Learn how to conditionally add Google Analytics tracking code to your WordPress Multisite
Add a delay to your WordPress login form
It is important to protect your WordPress website from brute-force attacks, and various security exist in doing so, but don't blatantly copy from other sites without proper testing, as this post points out.
PHP 5.6 default_charset change may break HTML output
An important note for everyone who's upgrading from PHP 5.4 and PHP 5.5, to PHP 5.6. The PHP `default_charset` in php.ini changed from "empty" to UTF-8, making UTF-8 the default charset in PHP. This may break HTML output if you try to set a different charset in your HTML head. It may also break functions like htmlentities() and htmlspecialchars.
Convert PHP ext/mysql to MySQLi
Migrating away from ext/mysql to MySQLi (or PHP Data Object ([PDO](http://php.net/pdo "PHP Data Objects"))) is important, because the ext/mysql functions are deprecated as of PHP 5.5.0. If you do not update your PHP code, your website will fail soon!
How to set a good PHP realpath_cache_size
Learn how to optimize PHP performance by checking and setting PHP realpath_cache_size
Redirect old URL to new URL or send 404 page with PHP
If you've moved some old PHP pages, or URLs, to new pages and URLs, you can use the following PHP code snippet to easily redirect all visitors and incoming requests to the new location. This PHP code snippet uses a 301 Moved Permanently redirect, perfect for SEO and returns a 404 Not Found if a new location hasn't been set up yet.
Display commas in WordPress tags
How to use a tag with a comma in it in WordPress? Normally, in WordPress all tags are comma seperated: php, wordpress, website, functions.php. But what if you need to use a tag with commas in it? For instance "cafe, bar, restaurants". Easy, create a filter in your WordPress functions.php, and here is how...
Check website availability with PHP and cURL
Here you'll find a PHP script to check if your website is up and online available. It uses PHP and cURL. This script comes in handy because website uptime and availability is important, and you want your website to be always online available. If your website is down, it'll send you an email to notify you about downtime.
Custom PHP version on IIS Express and WebMatrix 3
PHP 7 with OPcache in IIS Express for Microsoft WebMatrix 3: learn how to create your own PHP development environment easily with Microsoft WebMatrix and IIS Express and your own custom PHP version. Note: this guide also applies to newer PHP versions, just change the version numbers.
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