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Enqueue script only when shortcode is present in post

<?php
/* 
= Enqueue script only when shortcode is present in post
* WordPress: 3.3.1
* Version: 1.0
* URL: elbone.com.au
* Files: functions.php
*/

// Filter post content to find occurence of shortcode
// Note that the_posts gets triggered before wp_head
add_filter('the_posts', 'elbone_conditionally_add_scripts_and_styles'); 
if (!function_exists('elbone_conditionally_add_scripts_and_styles')) {
    function elbone_conditionally_add_scripts_and_styles($posts){
        $shortcode = '[code]';
        if (empty($posts)) 
            return $posts;
	    $shortcode_found = false;
	    foreach ($posts as $post) {
		    if (stripos($post->post_content, $shortcode) !== false) {
			    $shortcode_found = true;
			    break;
		    }
	    }
	    if ($shortcode_found) {
		    // enqueue here
		    wp_enqueue_style('my-style', '/style.css');
		    wp_enqueue_script('my-script', '/script.js');
	    }
	    return $posts;
    }
}
https://snipt.net/embed/376d4ee2d05f18b70e758ad67dce1eee/
/raw/376d4ee2d05f18b70e758ad67dce1eee/
376d4ee2d05f18b70e758ad67dce1eee
php
PHP
32
2019-08-21T18:36:56
True
False
False
/api/public/snipt/40679/
enqueue-script-only-when-shortcode-is-present-in-post
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a> <a href="#L-31">31</a> <a href="#L-32">32</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="cp">&lt;?php</span> </span><span id="L-2"><a name="L-2"></a><span class="cm">/* </span> </span><span id="L-3"><a name="L-3"></a><span class="cm">= Enqueue script only when shortcode is present in post</span> </span><span id="L-4"><a name="L-4"></a><span class="cm">* WordPress: 3.3.1</span> </span><span id="L-5"><a name="L-5"></a><span class="cm">* Version: 1.0</span> </span><span id="L-6"><a name="L-6"></a><span class="cm">* URL: elbone.com.au</span> </span><span id="L-7"><a name="L-7"></a><span class="cm">* Files: functions.php</span> </span><span id="L-8"><a name="L-8"></a><span class="cm">*/</span> </span><span id="L-9"><a name="L-9"></a> </span><span id="L-10"><a name="L-10"></a><span class="c1">// Filter post content to find occurence of shortcode</span> </span><span id="L-11"><a name="L-11"></a><span class="c1">// Note that the_posts gets triggered before wp_head</span> </span><span id="L-12"><a name="L-12"></a><span class="nx">add_filter</span><span class="p">(</span><span class="s1">&#39;the_posts&#39;</span><span class="p">,</span> <span class="s1">&#39;elbone_conditionally_add_scripts_and_styles&#39;</span><span class="p">);</span> </span><span id="L-13"><a name="L-13"></a><span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nb">function_exists</span><span class="p">(</span><span class="s1">&#39;elbone_conditionally_add_scripts_and_styles&#39;</span><span class="p">))</span> <span class="p">{</span> </span><span id="L-14"><a name="L-14"></a> <span class="k">function</span> <span class="nf">elbone_conditionally_add_scripts_and_styles</span><span class="p">(</span><span class="nv">$posts</span><span class="p">){</span> </span><span id="L-15"><a name="L-15"></a> <span class="nv">$shortcode</span> <span class="o">=</span> <span class="s1">&#39;[code]&#39;</span><span class="p">;</span> </span><span id="L-16"><a name="L-16"></a> <span class="k">if</span> <span class="p">(</span><span class="k">empty</span><span class="p">(</span><span class="nv">$posts</span><span class="p">))</span> </span><span id="L-17"><a name="L-17"></a> <span class="k">return</span> <span class="nv">$posts</span><span class="p">;</span> </span><span id="L-18"><a name="L-18"></a> <span class="nv">$shortcode_found</span> <span class="o">=</span> <span class="k">false</span><span class="p">;</span> </span><span id="L-19"><a name="L-19"></a> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$posts</span> <span class="k">as</span> <span class="nv">$post</span><span class="p">)</span> <span class="p">{</span> </span><span id="L-20"><a name="L-20"></a> <span class="k">if</span> <span class="p">(</span><span class="nb">stripos</span><span class="p">(</span><span class="nv">$post</span><span class="o">-&gt;</span><span class="na">post_content</span><span class="p">,</span> <span class="nv">$shortcode</span><span class="p">)</span> <span class="o">!==</span> <span class="k">false</span><span class="p">)</span> <span class="p">{</span> </span><span id="L-21"><a name="L-21"></a> <span class="nv">$shortcode_found</span> <span class="o">=</span> <span class="k">true</span><span class="p">;</span> </span><span id="L-22"><a name="L-22"></a> <span class="k">break</span><span class="p">;</span> </span><span id="L-23"><a name="L-23"></a> <span class="p">}</span> </span><span id="L-24"><a name="L-24"></a> <span class="p">}</span> </span><span id="L-25"><a name="L-25"></a> <span class="k">if</span> <span class="p">(</span><span class="nv">$shortcode_found</span><span class="p">)</span> <span class="p">{</span> </span><span id="L-26"><a name="L-26"></a> <span class="c1">// enqueue here</span> </span><span id="L-27"><a name="L-27"></a> <span class="nx">wp_enqueue_style</span><span class="p">(</span><span class="s1">&#39;my-style&#39;</span><span class="p">,</span> <span class="s1">&#39;/style.css&#39;</span><span class="p">);</span> </span><span id="L-28"><a name="L-28"></a> <span class="nx">wp_enqueue_script</span><span class="p">(</span><span class="s1">&#39;my-script&#39;</span><span class="p">,</span> <span class="s1">&#39;/script.js&#39;</span><span class="p">);</span> </span><span id="L-29"><a name="L-29"></a> <span class="p">}</span> </span><span id="L-30"><a name="L-30"></a> <span class="k">return</span> <span class="nv">$posts</span><span class="p">;</span> </span><span id="L-31"><a name="L-31"></a> <span class="p">}</span> </span><span id="L-32"><a name="L-32"></a><span class="p">}</span> </span></pre></div> </td></tr></table>
WordPress, enqueue, head, script, shortcode, theme