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Example code of websharks/wp-php-rv

Informations about the package wp-php-rv

WP PHP vX.x+ (Version Check w/ Dashboard Notice)

Stub for WordPress themes/plugins that require PHP vX.x+ (i.e. a minimum version that you define).

Example Usage in a Typical WordPress Theme/Plugin File

Alternate Approach

The check.php file will automatically return true upon using include() or require() in your scripts; i.e., iff the installation site is running PHP vX.x+ (as configured by $GLOBALS['wp_php_rv']). Otherwise it returns false. Therefore, the simplest way to run your check is to use if(require('wp-php-rv/src/includes/check.php')). However, you could also choose to do it this way.

Dashboard Notice that Calls your Software by Name

Note: If you omit the $brand_name argument, a default value is used instead. The default value is ucwords('[calling file basedir]'); e.g., if /my-plugin/stub.php calls wp-php-rv/src/includes/check.php, the default $software_name automatically becomes My Plugin. Nice!

What if multiple themes/plugins use this?

This is fine! :-) The wp-php-rv/src/includes/check.php file uses function_exists() as a wrapper; which allows it to be included any number of times, and by any number of plugins; and also from any number of locations. The only thing to remember, is that you MUST be sure to define $GLOBALS['wp_php_rv'] each time; i.e., each time you include('wp-php-rv/src/includes/check.php') or require('wp-php-rv/src/includes/check.php').

The point here, is that $GLOBALS['wp_php_rv'] defines a PHP version that is specific to your plugin requirements, so it should be defined explicitly by each plugin developer before they include('wp-php-rv/src/includes/check.php') or require('wp-php-rv/src/includes/check.php').

Can this just go at the top of my existing theme/plugin file?

No, there are two important things to remember.

  1. Don't forget to bundle a copy of the websharks/wp-php-rv repo with your theme/plugin. All you really need is the /src directory.
  2. Don't leave your existing code in the same file. Use this in a stub file that checks for PHP vX.x+ first (as seen in the examples above), BEFORE loading your code which depends on PHP vX.x+. Why? If you put a PHP vX.x+ check at the top of an existing PHP file, and that particular PHP file happens to contain code which is only valid in PHP v5.2 (for instance), it may still trigger a syntax error. For this reason, you should move your code into a separate file and create a stub file that checks for the existence of PHP vX.x+ first.

Can I test for required PHP extensions too?

Yes, $GLOBALS['wp_php_rv'] can be either a string with a required version, or an array with both a required version and a nested array of required PHP extensions. The easiest way to show how this works is by example (as seen below). Note that your array of required PHP extensions must be compatible with PHP's extension_loaded() function.

What else can I test for with this system?

A compatible OS, a compatible PHP version, required bits, required PHP functions, required PHP extensions, and a compatible WP version.

PHP Compatibility

Please note that the WP PHP RV software itself requires PHP v5.2 or higher, the same as WordPress core.

Copyright: © 2015 WebSharks, Inc. (coded in the USA)

Released under the terms of the GNU General Public License.

All versions of wp-php-rv with dependencies

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Requires php Version >=5.2
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