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How to Run Code Snippets on Specific Pages in WordPress

28 threads Sep 16, 2025 Plugin → Code snippets

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A common challenge for WordPress users is controlling where a code snippet runs. By default, a snippet added with the Code Snippets plugin will execute on every page of a website, which can cause conflicts, slow down page loads, or simply be unnecessary. Many users want to target their CSS, JavaScript, or PHP code to specific pages, such as a homepage, contact page, or landing page.

Why This Happens

The Code Snippets plugin is designed to insert code globally across a WordPress site. It doesn't natively include a point-and-click interface for selecting where a snippet should run. This design means that without adding conditional logic, a snippet will load on the front-end, back-end, or everywhere, depending on its scope, but not on specific pages.

The Solution: Using WordPress Conditional Tags

The most effective and widely supported method is to wrap your snippet's code in a conditional check using native WordPress functions. This approach gives you precise control over the pages where your snippet is active.

Method 1: For CSS, JavaScript, or HTML Snippets (Output in the <head>)

If your snippet outputs code directly to the <head> section (like inline CSS or JavaScript), you can use the wp_head action hook along with a conditional check.

add_action( 'wp_head', function () {
    // Replace 42 with your page ID, slug, or title
    if ( ! is_page( 42 ) ) {
        return; // Exit if it's not the correct page
    }
    ?>
    <style>
        /* Your CSS code here */
    </style>
    <?php
} );

Method 2: For PHP Function Snippets

If your snippet is a PHP function that modifies site behavior (e.g., a filter for WooCommerce), place the conditional check at the very beginning of the function.

add_filter( 'some_filter_hook', function ( $value ) {
    // Run this snippet ONLY on the page with ID 18
    if ( ! is_page( 18 ) ) {
        return $value; // Exit and return the original value
    }

    // Your modification code here
    return $modified_value;
} );

Targeting Multiple Pages or Using Different Conditions

You can easily expand these examples to target multiple pages or use different conditional tags.

add_action( 'wp_head', function () {
    // Run on pages with ID 123, 456, and the 'about' page slug
    if ( ! is_page( [ 123, 456, 'about' ] ) ) {
        return;
    }
    ?>
    <script>
        /* Your JavaScript code here */
    </script>
    <?php
} );

Other useful conditional functions include:

  • is_front_page() - Targets the site's front page.
  • is_single( 'post-slug' ) - Targets a specific post.
  • is_post_type_archive( 'product' ) - Targets a post type archive.

Important Considerations

  • Syntax is Critical: A missing parenthesis or quote (like is_page( 'richlands' ) vs. is_page( richlands' )) will cause the snippet to break.
  • Scope Matters: Conditional tags like is_page() only work correctly on the front-end. For admin-area snippets, use the admin_enqueue_scripts hook and check the $hook or get_current_screen().
  • This is a Workaround: The community has frequently requested a built-in feature for this. The Code Snippets team has indicated this functionality is planned for a future release.

By integrating these simple conditional checks, you can gain fine-grained control over your snippets, improving your site's performance and preventing unwanted conflicts.

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