SEO対策 wordpress

<?php //header.php にコピーしてください。?>

<?php include("inc/inc-head.php"); ?>

<?php

  $site_name = '株式';
  $title = '株式';
  $desc = 'きます';
  $key_word = 'キーわど';
  /*OGP 1200x620 png推奨*/
  $ogp_img = '/img/com/ogp.png';
  $key_word = '';
  /*32x32 png*/
  $icon_path = '/img/com/favo.png';
  $author = '';
  $site_url = (empty($_SERVER['HTTPS']) ? 'http://' : 'https://') . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];  $site_url = str_replace('http://', 'https://', $site_url);

  /*facebook app*/
  $fbapp_id = '';
?>
<?php if (is_home() || is_front_page()): ?>
  <?php
    $site_name ='';
    $title = '';
    $desc = '';
   ?>
<?php elseif (is_404('')): ?> <?php $title = '404ページ';;?> <?php $desc = 'URLが正しく入力されていないか、このページが削除された可能性があります。';?>
<?php elseif (is_page()): ?>
  <?php while (have_posts()) : the_post(); ?>
    <?php $title = the_title( '', '', false );?>
    <?php $title = get_field('pagetitle'); ?>
      <?php
      $desc = get_the_content();
      $desc= str_replace("<!-- wp:paragraph -->","",$desc);
      $desc= str_replace("<!-- /wp:paragraph -->","",$desc);
      $desc= str_replace("<br>","",$desc);
      $desc= str_replace("<p>","",$desc);
      $desc= str_replace("</p>","",$desc);
      $desc = str_replace(array("\r\n", "\r", "\n"), '', $desc);
      $desc= strip_tags($desc);

      if(mb_strlen($desc, 'UTF-8')>150){
        $desc= mb_substr($desc, 0, 150, 'UTF-8');
      }
       ?>
  <?php endwhile; ?>
<?php elseif (is_archive()): ?>
  <?php $cats = get_the_category(); ?>
  <?php /* アーカイブページ  */ ?>
  <?php foreach($cats as $cat): ?>
  <?php $title = $cat->cat_name . '一覧';?>
  <?php endforeach; ?>
  <?php $desc = $site_name.'の'.$cat->cat_name.'ページです。';?>
<?php elseif(is_single()): ?>
  <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
    <?php $title = the_title( '', '', false );?>

    <?php
      $desc = get_the_content();
      $desc= str_replace("<!-- wp:paragraph -->","",$desc);
      $desc= str_replace("<!-- /wp:paragraph -->","",$desc);
      $desc= str_replace("<br>","",$desc);
      $desc= str_replace("<p>","",$desc);
      $desc= str_replace("</p>","",$desc);
      $desc = str_replace(array("\r\n", "\r", "\n"), '', $desc);
      $desc= strip_tags($desc);
      if(mb_strlen($desc, 'UTF-8')>150){
        $desc= mb_substr($desc, 0, 150, 'UTF-8');
      }
     ?>
  <?php endwhile; ?>
 <?php else : ?>
 <?php endif; ?>
<?php endif; ?>

<title><?php echo $title;?> | <?php echo $site_name;?></title>
<meta name="description" content="<?php echo $desc;?>" />
<meta name="keywords"  content="<?php echo $key_word;?>" />
<meta name="author" content="<?php echo $author;?>">
<link rel="shortcut icon" href="<?php echo get_template_directory_uri();?><?php echo $icon_path;?>">
<meta property="og:locale" content="ja_JP" />
<meta property="og:type" content="website" />
<meta property="og:title" content="<?php echo $title;?> | <?php echo $site_name;?>" />
<meta property="og:description" content="<?php echo $title;?> | <?php echo $site_name;?>" />
<meta property="og:url" content="<?php echo $site_url;?>" />
<meta property="og:site_name" content="<?php echo $title;?> | <?php echo $site_name;?>" />
<meta property="og:image" content="<?php echo get_template_directory_uri();?><?php echo $ogp_img;?>" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:description" content="<?php echo $desc;?>" />
<meta name="twitter:title" content="<?php echo $title;?> | <?php echo $site_name;?>" />
<meta name="twitter:site" content="<?php echo $site_url;?>" />
<meta property="fb:app_id" content="<?php echo $fbapp_id; ?>" />
<?php if (!is_404()): ?><link rel="canonical" href="<?php echo $site_url;?>" /><?php endif; ?>
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<!-- User Heat Tag -->

<!-- End User Heat Tag -->