PHP - I Want To Disable A Specific Day On Calendar Help

<?php

    
class booking_diary {


// Mysqli connection
function __construct($link) {
    $this->link = $link;    
}

// Settings you can change:


// Time Related Variables
public $booking_start_time          = "09:00";            // The time of the first slot in 24 hour H:M format  
public $booking_end_time            = "13:00";             // The time of the last slot in 24 hour H:M format  
public $booking_frequency           = 02;               // The slot frequency per hour, expressed in minutes.      
//$date = new DateTime();
//$Pdate-> setDate(2020, 10, 29);
// Day Related Variables


public $day_format                    = 1;                // Day format of the table header.  Possible values (1, 2, 3)   
                                                            // 1 = Show First digit, eg: "M"
                                                             // 2 = Show First 3 letters, eg: "Mon"
                                                            // 3 = Full Day, eg: "Monday"
    
public $day_closed                    = array("Saturday", "Sunday");     // If you don't want any 'closed' days, remove the day so it becomes: = array();
//public $Special_day                 = array()
public $day_closed_text                = "CLOSED";         // If you don't want any any 'closed' remove the text so it becomes: = "";

// Cost Related Variables
public $cost_per_slot                = 20.00;            // The cost per slot
public $cost_currency_tag            = "&pound;";        // The currency tag in HTML such as &euro; &pound; &yen;


//  DO NOT EDIT BELOW THIS LINE

public $day_order                     = array("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");
public $day, $month, $year, $selected_date, $back, $back_month, $back_year, $forward, $forward_month, $forward_year, $bookings, $count, $days, $is_slot_booked_today;


/*========================================================================================================================================================*/


function make_calendar($selected_date, $back, $forward, $day, $month, $year) {

    // $day, $month and $year are the $_GET variables in the URL
    $this->day = $day;    
    $this->month = $month;
    $this->year = $year;
    
    // $back and $forward are Unix Timestamps of the previous / next month, used to give the back arrow the correct month and year 
    $this->selected_date = $selected_date;       
    $this->back = $back;
    $this->back_month = date("m", $back);
    $this->back_year = date("Y", $back); // Minus one month back arrow
    
    $this->forward = $forward;
    $this->forward_month = date("m", $forward);
    $this->forward_year = date("Y", $forward); // Add one month forward arrow    
    
    // Make the booking array
    $this->make_booking_array($year, $month);
    
}


function make_booking_array($year, $month, $j = 0) { 

    $stmt = $this->link->prepare("SELECT name, date, start FROM bookings WHERE date LIKE  CONCAT(?, '-', ?, '%')"); 
    $this->is_slot_booked_today = 0; // Defaults to 0

    $stmt->bind_param('ss', $year, $month);    
    $stmt->bind_result($name, $date, $start);    
    $stmt->execute();
    $stmt->store_result();
    
    while($stmt->fetch()) {    

        $this->bookings_per_day[$date][] = $start;

        $this->bookings[] = array(
            "name" => $name, 
            "date" => $date, 
            "start" => $start        
         ); 
    
        // Used by the 'booking_form' function later to check whether there are any booked slots on the selected day          
        if($date == $this->year . '-' . $this->month . '-' . $this->day) {
            $this->is_slot_booked_today = 1;
        } 

    }

    // Calculate how many slots there are per day
    $this->slots_per_day = 0;    
    for($i = strtotime($this->booking_start_time); $i<= strtotime($this->booking_end_time); $i = $i + $this->booking_frequency * 60) {
        $this->slots_per_day ++;
    }    

    $stmt->close();        
    $this->make_days_array($year, $month);    
            
} // Close function

 
function make_days_array($year, $month) { 

    // Calculate the number of days in the selected month                 
    $num_days_month = cal_days_in_month(CAL_GREGORIAN, $month, $year); 
    
    // Make $this->days array containing the Day Number and Day Number in the selected month       
    
    for ($i = 1; $i <= $num_days_month; $i++) {    
    
        // Work out the Day Name ( Monday, Tuesday... ) from the $month and $year variables
        $d = mktime(0, 0, 0, $month, $i, $year); 
        
        // Create the array
        $this->days[] = array("daynumber" => $i, "dayname" => date("l", $d));         
    }   

    /*
    Sample output of the $this->days array:
    
    [0] => Array
        (
            [daynumber] => 1
            [dayname] => Monday
        )

    [1] => Array
        (
            [daynumber] => 2
            [dayname] => Tuesday
        )
    */
    
    $this->make_blank_start($year, $month);
    $this->make_blank_end($year, $month);    

} // Close function


function make_blank_start($year, $month) {

    /*
    Calendar months start on different days
    Therefore there are often blank 'unavailable' days at the beginning of the month which are showed as a grey block
    The code below creates the blank days at the beginning of the month
    */    
    
    // Get first record of the days array which will be the First Day in the month ( eg Wednesday )
    $first_day = $this->days[0]['dayname'];    $s = 0;
        
        // Loop through $day_order array ( Monday, Tuesday ... )
        foreach($this->day_order as $i => $r) {
        
            // Compare the $first_day to the Day Order
            if($first_day == $r && $s == 0) {
                
                $s = 1;  // Set flag to 1 stop further processing
                
            } elseif($s == 0) {

                $blank = array(
                    "daynumber" => 'blank',
                    "dayname" => 'blank'
                );
            
                // Prepend elements to the beginning of the $day array
                array_unshift($this->days, $blank);
            }
            
    } // Close foreach    

} // Close function
    

function make_blank_end($year, $month) {

    /*
    Calendar months start on different days
    Therefore there are often blank 'unavailable' days at the end of the month which are showed as a grey block
    The code below creates the blank days at the end of the month
    */
    
    // Add blank elements to end of array if required.
    $pad_end = 7 - (count($this->days) % 7);

    if ($pad_end < 7) {
    
        $blank = array(
            "daynumber" => 'blank',
            "dayname" => 'blank'
        );
    
        for ($i = 1; $i <= $pad_end; $i++) {                            
            array_push($this->days, $blank);
        }
        
    } // Close if
        
    $this->calendar_top(); 

} // Close function
   
    
function calendar_top() {

    // This function creates the top of the table containg the date and the forward and back arrows 

    echo "
    <div id='lhs'><div id='outer_calendar'>
    
    <table border='0' cellpadding='0' cellspacing='0' id='calendar'>
        <tr id='week'>
        <td align='left'><a href='?month=" . date("m", $this->back) . "&amp;year=" . date("Y", $this->back) . "'>&laquo;</a></td>
        <td colspan='5' id='center_date'>" . date("F, Y", $this->selected_date) . "</td>    
        <td align='right'><a href='?month=" . date("m", $this->forward) . "&amp;year=" . date("Y", $this->forward) . "'>&raquo;</a></td>
    </tr>
    <tr>";
        
    /*
    Make the table header with the appropriate day of the week using the $day_format variable as user defined above
    Definition:
    
        1: Show First digit, eg: "M"
        2: Show First 3 letters, eg: "Mon"
        3: Full Day, eg: "Monday"        
        
    */
    
    foreach($this->day_order as $r) {
    
        switch($this->day_format) {
        
            case(1):     
                echo "<th>" . substr($r, 0, 1) . "</th>";                    
            break;
            
            case(2):
                echo "<th>" . substr($r, 0, 3) . "</th>";            
            break;
            
            case(3):     
                echo "<th>" . $r . "</th>";
            break;
            
        } // Close switch
    
    } // Close foreach

            
    echo "</tr>";   

    $this->make_cells();
    
} // Close function


function make_cells($table = '') {

    echo "<tr>";

    foreach($this->days as $i => $r) { // Loop through the date array

        $j = $i + 1; $tag = 0;             

        // If the the current day is found in the day_closed array, bookings are not allowed on this day  
        if(in_array($r['dayname'], $this->day_closed)) {            
            echo "\r\n<td width='21' valign='top' class='closed'>" . $this->day_closed_text . "</td>";        
            $tag = 1;
        }
        

        // Past days are greyed out
        if (mktime(0, 0, 0, $this->month, sprintf("%02s", $r['daynumber']) + 1, $this->year) < strtotime("now") && $tag != 1) {        
            
            echo "\r\n<td width='21' valign='top' class='past'>";            
                // Output day number 
                if($r['daynumber'] != 'blank') echo $r['daynumber']; 

            echo "</td>";        
            $tag = 1;
        }
        

        // If the element is set as 'blank', insert blank day
        if($r['dayname'] == 'blank' && $tag != 1) {        
            echo "\r\n<td width='21' valign='top' class='unavailable'></td>";    
            $tag = 1;
        }
                
                
        // Now check the booking array $this->booking to see whether we have a booking on this day                 
        $current_day = $this->year . '-' . $this->month . '-' . sprintf("%02s", $r['daynumber']);

        if(isset($this->bookings_per_day[$current_day]) && $tag == 0) {
        
            $current_day_slots_booked = count($this->bookings_per_day[$current_day]);

                if($current_day_slots_booked < $this->slots_per_day) {
                
                    echo "\r\n<td width='21' valign='top'>
                    <a href='calendar.php?month=" .  $this->month . "&amp;year=" .  $this->year . "&amp;day=" . sprintf("%02s", $r['daynumber']) . "' class='part_booked' title='This day is part booked'>" . 
                    $r['daynumber'] . "</a></td>"; 
                    $tag = 1;
                
                } else {
                
                    echo "\r\n<td width='21' valign='top'>
                    <a href='calendar.php?month=" .  $this->month . "&amp;year=" .  $this->year . "&amp;day=" . sprintf("%02s", $r['daynumber']) . "' class='fully_booked' title='This day is fully booked'>" . 
                    $r['daynumber'] . "</a></td>"; 
                    $tag = 1;            
                
                } // Close else    
        
        } // Close if

        
        if($tag == 0) {
        
            echo "\r\n<td width='21' valign='top'>
            <a href='calendar.php?month=" .  $this->month . "&amp;year=" .  $this->year . "&amp;day=" . sprintf("%02s", $r['daynumber']) . "' class='green' title='Please click to view bookings'>" . 
            $r['daynumber'] . "</a></td>";            
        
        }
        
        // The modulus function below ($j % 7 == 0) adds a <tr> tag to every seventh cell + 1;
            if($j % 7 == 0 && $i >1) {
            echo "\r\n</tr>\r\n<tr>"; // Use modulus to give us a <tr> after every seven <td> cells
        }        
        
    }        
        
    echo "</tr></table></div><!-- Close outer_calendar DIV -->";
    
    if(isset($_GET['year']))
    $this->basket();
        
    echo "</div><!-- Close LHS DIV -->";

    // Check booked slots for selected date and only show the booking form if there are available slots    
    $current_day = $this->year . '-' . $this->month . '-' . $this->day;    
    $slots_selected_day = 0;
    
    if(isset($this->bookings_per_day[$current_day]))
    $slots_selected_day = count($this->bookings_per_day[$current_day]);
    
    if($this->day != 0 && $slots_selected_day < $this->slots_per_day) { 
        $this->booking_form();
    }
    
    
} // Close function


function booking_form() {

    echo "
    <div id='outer_booking'><h2>Available Slots</h2>

    <p>
    The following slots are available on <span> " . $this->day . "-" . $this->month . "-" . $this->year . "</span>
    </p>
    
    <table width='400' border='0' cellpadding='2' cellspacing='0' id='booking'>
        <tr>
            <th width='150' align='left'>Start</th>
            <th width='150' align='left'>End</th>
            <th width='150' align='left'>Price</th>
            <th width='20' align='left'>Book</th>            
        </tr>
        <tr>
            <td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td>
        </tr>";
                

        // Create $slots array of the booking times
        for($i = strtotime($this->booking_start_time); $i<= strtotime($this->booking_end_time); $i = $i + $this->booking_frequency * 60) {
            $slots[] = date("H:i:s", $i);  
        }            
                

        // Loop through $this->bookings array and remove any previously booked slots
        
        if($this->is_slot_booked_today == 1) { // $this->is_slot_booked_today created in function 'make_booking_array'
        
            foreach($this->bookings as $i => $b) { 
                
                if($b['date'] == $this->year . '-' . $this->month . '-' . $this->day) {

                    // Remove any booked slots from the $slots array
                    $slots = array_diff($slots, array($b['start']));
                    
                } // Close if
                
            } // Close foreach
        
        } // Close if
        
                
        
        // Loop through the $slots array and create the booking table
        
        foreach($slots as $i => $start) {            

            // Calculate finish time
            $finish_time = strtotime($start) + $this->booking_frequency * 60; 
        
            echo "
            <tr>\r\n
                <td>" . $start . "</td>\r\n
                <td>" . date("H:i:s", $finish_time) . "</td>\r\n
                <td>" . $this->cost_currency_tag . number_format($this->cost_per_slot, 2) . "</td>\r\n
                <td width='110'><input data-val='" . $start . " - " . date("H:i:s", $finish_time) . "' class='fields' type='checkbox'></td>
            </tr>";
        
        } // Close foreach            
    
        echo "</table></div><!-- Close outer_booking DIV -->";
        

} // Close function


function basket($selected_day = '') {

    if(!isset($_GET['day']))
    $day = '01';
    else
    $day = $_GET['day'];    

    // Validate GET date values
    if(checkdate($_GET['month'], $day, $_GET['year']) !== false) {
        $selected_day = $_GET['year'] . '-' . $_GET['month'] . '-' . $day;    
    } else { 
        echo 'Invalid date!';
        exit();
    }
    
    echo "<div id='outer_basket'>
    
    <h2>Selected Slots</h2>
        
        <div id='selected_slots'></div>        
    
            <div id='basket_details'>
            
                <form method='post' action='book_slots.php'>
                
                    <label>Name</label>
                    <input name='name' id='name' type='text' class='text_box'>

                    <label>Email</label>
                    <input name='email' id='email' type='text' class='text_box'>    

                    <label>Phone</label>
                    <input name='phone' id='phone' type='text' class='text_box'>    

                        <div id='outer_price'>
                            <div id='currency'>" . $this->cost_currency_tag . "</div>
                            <div id='total'></div>
                        </div>                                    
                    
                    <input type='hidden' name='slots_booked' id='slots_booked'>
                    <input type='hidden' name='cost_per_slot' id='cost_per_slot' value='" . $this->cost_per_slot . "'>
                    <input type='hidden' name='booking_date' value='" . $_GET['year'] . '-' . $_GET['month'] . '-' . $day . "'>
                    
                    <input type='submit' class='classname' value='Make Booking'>

                </form>
            
            </div><!-- Close basket_details DIV -->
        
    </div><!-- Close outer_basket DIV -->";

} // Close function

                 
} // Close Class

?>