Function and usage of has_blocks() in wordpress

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    2024-01-08T15:59:47+00:00

    The has_blocks() function in WordPress is used to determine if a given post or content string contains blocks, which are the fundamental components of the WordPress block editor (also known as Gutenberg).

    Function Signature:

    has_blocks( int|string|WP_Post|null $post = null ): bool
    

    Description:

    • Purpose: has_blocks() checks if a post or a string of content contains blocks.
    • Performance-Oriented: The function is optimized for speed rather than strict accuracy. It identifies the pattern of a block but doesn't validate its entire structure.
    • Strict Accuracy Alternative: For more detailed and accurate block validation, you should use the block parser on the post content. The relevant function for this is parse_blocks().

    Parameters:

    • $post (int|string|WP_Post|null, optional): This can be:
      • A post content string.
      • A post ID.
      • A WP_Post object.
      • If null or not provided, the function uses the global $post object by default.
    • Default Value: null

    Return:

    • Type: bool
    • Description: Returns true if the post contains blocks, false otherwise.

    Sample Usage:

    1. Checking the Current Post:

    if ( has_blocks() ) {
        // The current post has blocks.
    }
    

    2. Checking a Specific Post by ID:

    $post_id = 123; // Replace with the actual post ID
    if ( has_blocks( $post_id ) ) {
        // The post with the specified ID has blocks.
    }
    

    3. Checking a Content String for Blocks:

    $content = 'Your content string here';
    if ( has_blocks( $content ) ) {
        // The content string contains blocks.
    }
    

    Practical Use Cases:

    • Theme Development: To conditionally apply styles or scripts when the post uses blocks.
    • Plugins: For functionality that depends on whether a post is using the block editor.
    • Custom Logic: Tailoring the output or processing of content based on the presence of blocks.

    Remember, has_blocks() is a quick check tool, and it may not catch every intricacy of block structures. For comprehensive block analysis, use parse_blocks().

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