How to prevent multiple post with same meta value being created simultaneously in WordPress (with ajax)

I’m trying to make my own appointment system for WordPress. For this, I created a post type called “appointments”. When users select a service from the service list, the available dates and times are listed. When the available date and time are selected and the appointment is created, a meta key named “appointment_datetime” is added for this appointment. Here is where the problem started.

Two different users should not be able to make an appointment for the same service at the same time. Therefore, when a user tries to create an appointment, the following method is used to check whether the date and time he chose are available.

$already_reserved = new WP_Query(array(
    'post_type' => 'appointments',
    'fields' => 'ids',
    'meta_query' => array(
        'relation' => 'AND',
            'key' => 'datetime',
            'value' => $date_time, // timestamps
            'type' => 'numeric',
            'compare' => '='
    'tax_query' => array(
            'taxonomy' => 'services',
            'field' => 'id',
            'terms' => $service_id,
if ( !empty($already_reserved->posts) ) {
    $response = 'Sorry, this date is full.';
} else {
    // create new appointment post
    // ...

And here is the ajax code I used:

var $response = jQuery('#response');
$('#createnew').click(function () {
    var service = document.getElementById('service').value;
    var datetime = document.getElementById('datetime').value;
    $response.html("<div class='loading'>Waiting...</div>");

        type: 'POST',
        url: myajax.ajaxurl,
        data: {
            action: 'new_appoitment',
            service: service,
            datetime: datetime,
            // ... another customer details
        success: function(data, textStatus, XMLHttpRequest) {

After all; When two different users click the button at the same time, they can create an appointment for the same date and time. Is there any way I can prevent this?

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I try to convert a category static slider in my home page for woocommerce but I don’t know use which loop or function to do that, here is my code:

<div class="row mt-3 mb-5">
                <div class="col-12">
                    <div class="category-section dt-sn dt-sl">
                        <div class="category-section-title dt-sl">
                            <h3>More Than 3000 products</h3>
                        <div class="category-section-slider dt-sl">
                            <div class="category-slider owl-carousel">
                                <div class="item">
                                    <a href="#" class="promotion-category">
                                        <img src="./assets/img/category/notebook-computer.png" alt="">
                                        <h4 class="promotion-category-name">Electronics</h4>
                                        <h6 class="promotion-category-quantity">150</h6>
                                <div class="item">
                                    <a href="#" class="promotion-category">
                                        <img src="./assets/img/category/lifeline-in-a-heart-outline.png" alt="">
                                        <h4 class="promotion-category-name">Beauty</h4>
                                        <h6 class="promotion-category-quantity">620</h6>
                                <div class="item">
                                    <a href="#" class="promotion-category">
                                        <img src="./assets/img/category/repair-tools.png" alt="">
                                        <h4 class="promotion-category-name">Tools</h4>
                                        <h6 class="promotion-category-quantity">310</h6>
                                <div class="item">
                                    <a href="#" class="promotion-category">
                                        <img src="./assets/img/category/hanbok.png" alt="">
                                        <h4 class="promotion-category-name">Clothes</h4>
                                        <h6 class="promotion-category-quantity">1000</h6>
                                <div class="item">
                                    <a href="#" class="promotion-category">
                                        <img src="./assets/img/category/sofa.png" alt="">
                                        <h4 class="promotion-category-name">Home Appliance </h4>
                                        <h6 class="promotion-category-quantity">615</h6>
                                <div class="item">
                                    <a href="#" class="promotion-category">
                                        <img src="./assets/img/category/school-material.png" alt="">
                                        <h4 class="promotion-category-name">Art</h4>
                                        <h6 class="promotion-category-quantity">60</h6>

apache – How to make wordpress page as location for main that is worked on nuxt.js+node?

There are 2 containers with sites:
on nuxt.js
on wordpress
They work in the same environment, that is, they are visible to each other.
It is necessary in the 3rd container with Nginx to display the wordpress page as location / content when passing from nuxt.js.
That is, works under node + nuxt, and when you go to the link, we go to the wordpress page with posts. You also need the link to work as a regular wordpress route and open a full-fledged wordpress admin panel. But wordpress itself can work on any other subdomain, if there are difficulties with the wp-admin output. How to implement this using nginx + wordpress or suggest other options?

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I am re-building a website that is currently hosted in Joomla. I don’t want to copy the entire joomla site over because the current layound / information architecture is poor and I have to redo it, so I want to start from scratch.

That being said, there are ~200 news posts that I don’t want to have to migrate manually. I now have a half-built wordpress site, and would like to copy just the posts and images from the Joomla site. I imagine I could copy the joomla site in its entirety to a new WP site and then migrate the posts from there, but I would prefer to do it in one step.

Is a plugin necessary for this? Or am I missing a shortcut to get the posts only?

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“lightbox_close”: “Close”,
“lightbox_next”: “Next”,
“lightbox_previous”: “Previous”,
“lightbox_error”: “The requested content cannot be loaded. Please try again later.”,
“lightbox_start_slideshow”: “Start slideshow”,
“lightbox_stop_slideshow”: “Stop slideshow”,
“lightbox_full_screen”: “Full screen”,
“lightbox_thumbnails”: “Thumbnails”,
“lightbox_download”: “Download”,
“lightbox_share”: “Share”,
“lightbox_zoom”: “Zoom”,
“lightbox_new_window”: “New window”,
“lightbox_toggle_sidebar”: “Toggle sidebar”

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Change WordPress read more text

I’ve tried a ton of ways to do this but can’t figure it out. I need to change the read more text on only one category of post type. (I’ve already added a function to recognize the category as a body class, but right now I can’t even get the code to change the read more text across all the blog archive areas (I think because my theme is using a theme specific section for these.)

Here’s what I tried to do first, which just added a new button above the read more button instead of replacing it:

function new_excerpt_more($more) {
// edit here if you like
return ‘Hear This Episode’;
} add_filter( ‘excerpt_more’, ‘new_excerpt_more’ );

I’ve also tried at least a dozen other options with no results at all.