i want function for post visit on each viewand also show count views in post by idin wordpress

To track the number of views for each post in WordPress, you can create a custom function and use a combination of WordPress hooks and database operations. Here's an example of how you can achieve this:

Step 1: Create a custom table to store the post views count. You can use the following SQL query to create the table:

CREATE TABLE wp_post_views (
    id INT(11) NOT NULL AUTO_INCREMENT,
    post_id INT(11) NOT NULL,
    views INT(11) DEFAULT 0,
    PRIMARY KEY (id),
    UNIQUE KEY post_id (post_id)
);

Step 2: Add the following code to your theme's functions.php file to define the custom function:

function increment_post_views($post_id) {
    global $wpdb;
    $table_name = $wpdb->prefix . 'post_views';
    
    // Check if the post ID exists in the table
    $views = $wpdb->get_var($wpdb->prepare("SELECT views FROM $table_name WHERE post_id = %d", $post_id));
    
    if ($views) {
        // If the post ID exists, increment the views count
        $wpdb->query($wpdb->prepare("UPDATE $table_name SET views = views + 1 WHERE post_id = %d", $post_id));
    } else {
        // If the post ID doesn't exist, insert a new row with views count as 1
        $wpdb->query($wpdb->prepare("INSERT INTO $table_name (post_id, views) VALUES (%d, 1)", $post_id));
    }
}

function track_post_views() {
    if (is_single()) {
        global $post;
        if ($post) {
            increment_post_views($post->ID);
        }
    }
}
add_action('wp_head', 'track_post_views');

Step 3: To display the post views count on the post, you can use the following code within your theme file (e.g., single.php):

<?php
global $post;
$views = $wpdb->get_var($wpdb->prepare("SELECT views FROM $wpdb->prefix" . "post_views WHERE post_id = %d", $post->ID));
echo 'Views: ' . $views;
?>

Make sure to modify the table name (wp_post_views) and prefix (wp_) in the code according to your WordPress installation.

With these modifications, the increment_post_views function will be called on each view of a single post, incrementing the views count in the database. The track_post_views function is hooked to the wp_head action, ensuring it's executed on each page load. Finally, the code snippet within the single.php file will display the post views count