The function reference you can check more detail here: http://php.net/manual/en/function.shuffle.php

Here is an example for how to randomise elements in PHP array with shuffle

Let ‘s run this code

<?php
    $natural_born_killers = array("lions", "tigers", "bears", "kittens");
    shuffle($natural_born_killers);
    var_dump($natural_born_killers);
?>

Run in many times and try to see the result array, it will show you different result every time you run it.
One major drawback to using shuffle() is that it mangles your array keys. This is unavoidable sadly, and you need to live with it when you use shuffle(). Note that shuffle uses its parameter by reference – it returns true, but shuffles up the parameter you pass to it.

If you want to pick out just one random value from an array, you can use array_rand() – it takes an array to read from, then returns one random key from inside there. The advantage to array_rand() is that it leaves the original array intact – you can use the random key returned to grab the related value from the array, but other than that the original array is left untouched.

Array_rand() has an optional second parameter that allows you to specify the number of elements you would like returned. These are each chosen randomly from the array, and are not necessarily returned in any particular order.

Before I show you an example, you need to be aware of the following attributes of array_rand():

It returns the keys in your array. If these aren’t specified, the default integer indexes are used. To get the value out of the array, just look up the value at the key.

If you ask for one random element, or do not specify parameter two, you will get a standard variable back.

If you ask for more than one random element, you will receive an array of variables back.

If you ask for more random elements than there are in the array you will get an error

Array_rand() will not return duplicate elements if you request more than one random element

If you want to read most or all of the elements from your array in a random order, use a mass-randomiser like shuffle() – it is faster.

With that in mind, here’s an example of array_rand() in action:

<?php
    $natural_born_killers = array("lions", "tigers", "bears", "kittens");
    var_dump(array_rand($natural_born_killers, 2));
?>

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Now, we share you this useful ebook with all of topic it can cover what include:

As you see, you cover almost the popular problems what a wordpress developer need to do their job. If you finish this ebook research you can get started with any wordpress plugin project and make money as you want :).

You can download the ebook in the form below:

Good luck!

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WordPress Plugin Idea

Before building any plugin, we should site down and write all of our requirements to save time and do the right way in coding time. In my simple wordpress plugin idea include:

Now, let ‘s go with our first wordpress plugin

WordPress Plugin Basic File Structure

As the minimum requirements, wordpress plugin only need one php file in folder /wp-content/plugins/ but no one do thing like that since it ‘s very difficult to maintain. So even though we do a simple wordpress plugin, let ‘s learn for future to build a complex plugin. So, the basic wordpress plugin file structure include:

• A folder in /wp-content/plugins/: let ‘s create it is simple-shortcode
• A php file in plugin folder /wp-content/plugins/simple-shortcode with the same name as plugin folder, so it should be /wp-content/plugins/simple-shortcode/simple-shortcode.php

wordpress plugin file structure

WordPress Plugin Header

Somehow WordPress need to know the basic information of your wordpress plugin to display in control panel, kind of detail of a plugin. And here is all that needs to be in your plugin file for WordPress to recognize it once uploaded. Let ‘s add it as first line in file simple-shortcode.php

<?php
/*
Plugin Name: My Custom Functions
*/

See how easy that is? At this point you have a plugin that you can activate in your WordPress plugins area. Of course our plugin doesn’t actually do anything yet but the point is you have laid the foundation of your very own plugin and it was super easy.

Now there are other elements that you can include in this header. Things like a description, version, author, etc. You can read more about those here: http://codex.wordpress.org /Writing_a_Plugin #File_Headers

That ‘s all to get a new wordpress plugin, let visit your wordpress plugin admin and activate it. Time to build the main function

Capture wordpress hooks

Keep in mind that to get our plugin optimize, we only execute our action code via wordpress shortcode except some special case. For the most case, we will capture the init hook of wordpress. Here is the code.

add_action( 'init', 'simple_shortcode_register_shortcodes');

See, we call function simple_shortcode_register_shortcodes when the wordpress system init and we need to define this function.

function simple_shortcode_register_shortcodes()
{
add_shortcode('my-first-shortcode', 'simple_shortcode_my_first_shortcode');
}

Again we add a shortcode with tag my-first-shortcode and defined by function simple_shortcode_my_first_shortcode. One more time we need to define this function:

function simple_shortcode_my_first_shortcode($atts, $content){
extract(shortcode_atts(array(
'lastname' => ''
), $atts));
return "<strong>{$content} {$lastname}";
}

Ok, it ‘s quite simple, for more detail how to define this function you can look at wordpress API https://codex.wordpress.org/Function_Reference/add_shortcode . And I guess, you will know where to search for WordPress API :-).

The next step, let ‘s test it. Create a new post with this detail:

Now, view it on front-end to see the magic.

And here is the bonus for you if you need more advance about wordpress plugin https://codex.wordpress.org/Writing_a_Plugin

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