php artisan make:command ExampleCommand

<?php
//オリジナルサムネイルタグの取得
if (!function_exists('get_original_image_tag')) :
  function get_original_image_tag($image_url, $width, $height, $class, $alt = null)
  {
    $html = '<img src="' . esc_url($image_url) . '" alt="' . esc_attr($alt) . '" class="' . esc_attr($class) . '" width="' . esc_attr($width) . '" height="' . esc_attr($height) . '" />';
    $html = convert_all_lazy_load_tag($html);
    $html = apply_filters("youtubeimage",$html);
    return $html;
  }
endif;

<?php
/*
Plugin Name: youtube image
Description: youtube image chg
Version: 1.0
*/
if (!defined('ABSPATH')) exit;
function youtubeimage_chg($imgurl){
    $url = null;
    if(preg_match("/(https:\/\/www\.youtube\.com\/watch\?v=[\-|_|a-zA-Z|0-9]{1,})/",get_the_content(),$matches)){
        $url = "https://img.youtube.com/vi/".preg_replace("/(https:\/\/www\.youtube\.com\/watch\?v=)/","",$matches[0])."/hqdefault.jpg.webp";
        $url = preg_replace("/(src=\"https:\/\/.*no\-image\-[0-9]{2,3}\.png.webp\")/","src=\"".$url."\"",$imgurl);
     }
     return $url?$url:$imgurl;
}

add_filter("youtubeimage","youtubeimage_chg");

date_default_timezone_set("Asia/Tokyo");

wp-includes\general-template.php 

function get_calendar( $initial = true, $echo = true ) {
	global $wpdb, $m, $monthnum, $year, $wp_locale, $posts;

	$key   = md5( $m . $monthnum . $year );
	$cache = wp_cache_get( 'get_calendar', 'calendar' );

	if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) {
		/** This filter is documented in wp-includes/general-template.php */
		$output = apply_filters( 'get_calendar', $cache[ $key ] );

		if ( $echo ) {
			echo $output;
			return;
		}

		return $output;
	}

	if ( ! is_array( $cache ) ) {
		$cache = array();
	}

	// Quick check. If we have no posts at all, abort!
	if ( ! $posts ) {
		$gotsome = $wpdb->get_var( "SELECT 1 as test FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" );
		if ( ! $gotsome ) {
			$cache[ $key ] = '';
			wp_cache_set( 'get_calendar', $cache, 'calendar' );
			return;
		}
	}

	if ( isset( $_GET['w'] ) ) {
		$w = (int) $_GET['w'];
	}
	// week_begins = 0 stands for Sunday.
	$week_begins = (int) get_option( 'start_of_week' );

	// Let's figure out when we are.
	if ( ! empty( $monthnum ) && ! empty( $year ) ) {
		$thismonth = zeroise( intval( $monthnum ), 2 );
		$thisyear  = (int) $year;
	} elseif ( ! empty( $w ) ) {
		// We need to get the month from MySQL.
		$thisyear = (int) substr( $m, 0, 4 );
		// It seems MySQL's weeks disagree with PHP's.
		$d         = ( ( $w - 1 ) * 7 ) + 6;
		$thismonth = $wpdb->get_var( "SELECT DATE_FORMAT((DATE_ADD('{$thisyear}0101', INTERVAL $d DAY) ), '%m')" );
	} elseif ( ! empty( $m ) ) {
		$thisyear = (int) substr( $m, 0, 4 );
		if ( strlen( $m ) < 6 ) {
			$thismonth = '01';
		} else {
			$thismonth = zeroise( (int) substr( $m, 4, 2 ), 2 );
		}
	} else {
		$thisyear  = current_time( 'Y' );
		$thismonth = current_time( 'm' );
	}

	$unixmonth = mktime( 0, 0, 0, $thismonth, 1, $thisyear );
	$last_day  = gmdate( 't', $unixmonth );
	$oooothisyear  = date( 'Y', $unixmonth  );
	$oooolast_day  = date( 't', $unixmonth );
	$oooothismonth = date( 'm' , $unixmonth);

	// Get the next and previous month and year with at least one post.
	$previous = $wpdb->get_row(
		"SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
		FROM $wpdb->posts
		WHERE post_date < '$thisyear-$thismonth-01'
		AND post_type = 'post' AND post_status = 'publish'
			ORDER BY post_date DESC
			LIMIT 1"
	);
	$next     = $wpdb->get_row(
		"SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
		FROM $wpdb->posts
		WHERE post_date > '$oooothisyear-$oooothismonth-{$oooolast_day} 23:59:59'
		AND post_type = 'post' AND post_status = 'publish'
			ORDER BY post_date ASC
			LIMIT 1"
	);

	/* translators: Calendar caption: 1: Month name, 2: 4-digit year. */
	$calendar_caption = _x( '%1$s %2$s', 'calendar caption' );
	$calendar_output  = '<table id="wp-calendar" class="wp-calendar-table">
	<caption>' . sprintf(
		$calendar_caption,
		$wp_locale->get_month( $thismonth ),
		gmdate( 'Y', $unixmonth )
	) . '</caption>
	<thead>
	<tr>';

	$myweek = array();

	for ( $wdcount = 0; $wdcount <= 6; $wdcount++ ) {
		$myweek[] = $wp_locale->get_weekday( ( $wdcount + $week_begins ) % 7 );
	}

	foreach ( $myweek as $wd ) {
		$day_name         = $initial ? $wp_locale->get_weekday_initial( $wd ) : $wp_locale->get_weekday_abbrev( $wd );
		$wd               = esc_attr( $wd );
		$calendar_output .= "\n\t\t<th scope=\"col\" title=\"$wd\">$day_name</th>";
	}

	$calendar_output .= '
	</tr>
	</thead>
	<tbody>
	<tr>';

	$daywithpost = array();

	// Get days with posts.
	$dayswithposts = $wpdb->get_results(
		"SELECT DISTINCT DAYOFMONTH(post_date)
		FROM $wpdb->posts WHERE post_date >= '{$thisyear}-{$thismonth}-01 00:00:00'
		AND post_type = 'post' AND post_status = 'publish'
		AND post_date <= '{$oooothisyear}-{$oooothismonth}-{$oooolast_day} 23:59:59'",
		ARRAY_N
	);

	if ( $dayswithposts ) {
		foreach ( (array) $dayswithposts as $daywith ) {
			$daywithpost[] = (int) $daywith[0];
		}
	}

	// See how much we should pad in the beginning.
	$pad = calendar_week_mod( gmdate( 'w', $unixmonth ) - $week_begins );
	if ( 0 != $pad ) {
		$calendar_output .= "\n\t\t" . '<td colspan="' . esc_attr( $pad ) . '" class="pad">?</td>';
	}

	$newrow      = false;
	$daysinmonth = (int) gmdate( 't', $unixmonth );
	$oooodaysinmonth = (int) date( 't', $unixmonth );

	for ( $day = 1; $day <= $oooodaysinmonth; ++$day ) {
		if ( isset( $newrow ) && $newrow ) {
			$calendar_output .= "\n\t</tr>\n\t<tr>\n\t\t";
		}
		$newrow = false;

		if ( current_time( 'j' ) == $day &&
			current_time( 'm' ) == $thismonth &&
			current_time( 'Y' ) == $thisyear ) {
			$calendar_output .= '<td id="today">';
		} else {
			$calendar_output .= '<td>';
		}

		if ( in_array( $day, $daywithpost, true ) ) {
			// Any posts today?
			$date_format = gmdate( _x( 'F j, Y', 'daily archives date format' ), strtotime( "{$thisyear}-{$thismonth}-{$day}" ) );
			/* translators: Post calendar label. %s: Date. */
			$label            = sprintf( __( 'Posts published on %s' ), $date_format );
			$calendar_output .= sprintf(
				'<a href="%s" aria-label="%s">%s</a>',
				get_day_link( $thisyear, $thismonth, $day ),
				esc_attr( $label ),
				$day
			);
		} else {
			$calendar_output .= $day;
		}

		$calendar_output .= '</td>';

		if ( 6 == calendar_week_mod( gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins ) ) {
			$newrow = true;
		}
	}

	$pad = 7 - calendar_week_mod( gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins );
	if ( 0 != $pad && 7 != $pad ) {
		$calendar_output .= "\n\t\t" . '<td class="pad" colspan="' . esc_attr( $pad ) . '">?</td>';
	}

	$calendar_output .= "\n\t</tr>\n\t</tbody>";

	$calendar_output .= "\n\t</table>";

	$calendar_output .= '<nav aria-label="' . __( 'Previous and next months' ) . '" class="wp-calendar-nav">';

	if ( $previous ) {
		$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev"><a href="' . get_month_link( $previous->year, $previous->month ) . '">? ' .
			$wp_locale->get_month_abbrev( $wp_locale->get_month( $previous->month ) ) .
		'</a></span>';
	} else {
		$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev">?</span>';
	}

	$calendar_output .= "\n\t\t" . '<span class="pad">?</span>';

	if ( $next ) {
		$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next"><a href="' . get_month_link( $next->year, $next->month ) . '">' .
			$wp_locale->get_month_abbrev( $wp_locale->get_month( $next->month ) ) .
		' ?</a></span>';
	} else {
		$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next">?</span>';
	}

	$calendar_output .= '
	</nav>';

	$cache[ $key ] = $calendar_output;
	wp_cache_set( 'get_calendar', $cache, 'calendar' );

	if ( $echo ) {
		/**
		 * Filters the HTML calendar output.
		 *
		 * @since 3.0.0
		 *
		 * @param string $calendar_output HTML output of the calendar.
		 */
		echo apply_filters( 'get_calendar', $calendar_output );
		return;
	}
	/** This filter is documented in wp-includes/general-template.php */
	return apply_filters( 'get_calendar', $calendar_output );
}

404.php
archive.php
category.php
footer.php
functions.php
header.php
index.php
page.php
screenshot.jpg.webp
search.php
sidebar.php
single.php
style.css

/*
Theme Name : 自作テンプレート名(英字)
*/

require_once '/vendor/autoload.php';
$loader = new \Twig\Loader\FilesystemLoader('テンプレートの階層を指定');
$twig = new \Twig\Environment($loader,['debug' => true]);
$twig->addExtension(new \Twig\Extension\DebugExtension());//?ここの記述を忘れずに！！
echo $twig->render('index.html（レンダーするテンプレートファイル）', ['items'=>$this->top_view()]);

<!DOCTYPE html>
<html lang="ja">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>お問い合わせ</title>
    <script src="https://code.jquery.com/jquery-3.4.1.min.js"
        integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
        integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"
        integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"
        crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"
        integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6"
        crossorigin="anonymous"></script>
    <script src="js/common.js"></script>
    <style>
        .jumbotron {
            background-color: #2bd4d0;
            color: #fff;
        }

        .btn-primary {
            color: #fff;
            background-color: #2bd4d0 !important;
            border-color: #2bd4d0 !important;
        }

        .input-group-text {
            background-color: #2bd4d0;
            border: 1px solid #2bd4d0;
        }
    </style>
</head>

<body>
    <div class="jumbotron jumbotron-fluid">
        <div class="container">
            <h1 class="display-4">お問い合わせ</h1>
            <p class="lead">必須項目を入力し送信ボタンを押してください。<br>DEMOのため送信はできません</p>
        </div>
        <div class="alert alert-warning" id="error_sendmail" role="alert">
        </div>
    </div>
    <form action="index.php" method="POST">
        <div class="container">
            <div class="row">
                <div class="input-group mb-3">
                    <div class="input-group-prepend">
                        <span class="input-group-text">お名前[必須]</span>
                    </div>
                    <input type="text" name="name" class="form-control" id="name" placeholder="name" value="{{name}}">
                </div>
                <div class="alert alert-warning" id="error_name" role="alert">
                </div>
                <div class="input-group mb-3">
                    <div class="input-group-prepend">
                        <span class="input-group-text">メールアドレス[必須]</span>
                    </div>
                    <input type="email" name="email" class="form-control" id="email" placeholder="name@example.com"
                        value="{{email}}">
                </div>
                <div class="alert alert-warning" id="error_email" role="alert">
                </div>
                <div class="input-group mb-3">
                    <div class="input-group-prepend">
                        <span class="input-group-text" id="basic-addon1">@</span>
                    </div>
                    <input type="text" name="twitter_account" class="form-control" placeholder="twitter account"
                        aria-label="twitter account" aria-describedby="basic-addon1" value="{{twitter_account}}">
                </div>
                <div class="input-group mb-3">
                    <div class="input-group-prepend">
                        <span class="input-group-text">お問い合わせ内容[必須]</span>
                    </div>
                    <select name="meun" class="form-control" id="exampleFormControlSelect1">
                        {% for selectop in meun_option %}
                        <option value="{{selectop.value}}" {{ selectop.value == selectoped ? " selected":"" }}>
                            {{selectop.name}}</option>
                        {% endfor %}
                    </select>
                </div>
                <div class="alert alert-warning" id="error_meun" role="alert">
                </div>
                <div class="input-group">
                    <div class="input-group-prepend">
                        <span class="input-group-text">コメント[必須]</span>
                    </div>
                    <textarea name="comment" rows="10" class="form-control" aria-label="コメント">{{comment}}</textarea>
                </div>
            </div>
            <div class="row">
                <footer class="blockquote-footer">
                    <small class="text-muted">
                        ご自由に記入ください。
                    </small>
                </footer>
            </div>
            <div class="alert alert-warning" id="error_comment" role="alert">
            </div>
            <button type="submit" class="mt-2 btn btn-primary btn-lg btn-block">送信する</button>
        </div>
    </form>
</body>

</html>

<?php
session_start();
require __DIR__ . '/vendor/autoload.php';
use Twig\Environment;
use Twig\Loader\FilesystemLoader;

$loader = new FilesystemLoader(__DIR__.'/templates');
$twig = new Environment($loader);
$meun_option = json_decode(file_get_contents("js/select.json"));

$form = ["name","email","twitter_account","meun","comment"];
$data = [];

if($_POST){
	foreach($_POST as $key=>$val){
		$_SESSION[$key] = strip_tags($val);
	}
}
if($_SESSION){
	foreach($_SESSION as $key=>$val){
		$_SESSION[$key] = strip_tags($val);
	}
}

foreach($form as $key => $val){
	$data[$val] = $_SESSION[$val]?$_SESSION[$val]:"";
}

extract($data);

print $twig->render('index.html.twig',["name"=>$name,"email"=>$email,"twitter_account"=>$twitter_account,"selectoped"=>$meun,"comment" => $comment,"meun_option"=>$meun_option]);