Change php version for cli on ubuntu

<?php
    $pages = array(
        'PAGE1' => 'FIRST PAGE',
        'PAGE2' => 'SECOND PAGE');
?>

<ul class="nav">
  <?php foreach ($pages as $pageId => $pageTitle): ?>
  <li <?=(($_GET['pg'] == $pageId) ? 'class="active"' : '')?>><a href="?pg=<?=$pageId?>"><?=$pageTitle?></a></li>
  <?php endforeach; ?>
</ul>

<?php while (have_posts()) : the_post();
	/* grab the url for the full size featured image */
	$featured_img_url = get_the_post_thumbnail_url(get_the_ID(),'full');

/* Background Image as a div bg. */
	echo '<div class="featuredImage" style="background-mage:url('.esc_url($featured_img_url).');"></div>';
        ?>

    <?php endwhile; ?>

/**
 * Never worry about cache again!
 */
function my_load_scripts($hook) {
 
    // create my own version codes
    $my_js_ver  = date("ymd-Gis", filemtime( plugin_dir_path( __FILE__ ) . 'js/custom.js' ));
    $my_css_ver = date("ymd-Gis", filemtime( plugin_dir_path( __FILE__ ) . 'style.css' ));
     
    // 
    wp_enqueue_script( 'custom_js', plugins_url( 'js/custom.js', __FILE__ ), array(), $my_js_ver );
    wp_register_style( 'my_css',    plugins_url( 'style.css',    __FILE__ ), false,   $my_css_ver );
    wp_enqueue_style ( 'my_css' );
 
}
add_action('wp_enqueue_scripts', 'my_load_scripts');

# Show interactive menu to choose php version from
sudo update-alternatives --config php

echo($table_name != '') ? "<td>".$table_name."</td>" : "<td>-</td>";
echo($sql_query != '') ? "<td>".$sql_query."</td>" : "<td>-</td>";
 echo($day != '') ? "<td>".$day."</td>" : "<td>-</td>";

UPDATE tbl_users 
SET img = CASE gender 
        WHEN gender=1 THEN 'client_files/44073762e25b9fed53b/userPic/default/male.jpg' 
        WHEN gender=2 THEN 'client_files/44073762e25b9fed53b/userPic/default/female.jpg' 
        ELSE 'client_files/44073762e25b9fed53b/userPic/default/male.jpg' 
      END 

 var is_assessment_categorie;

if ($('#is_assessment_categorie_yes').prop('checked')) {
        is_assessment_categorie = 1;
    } else {
        is_assessment_categorie = 0;
    }

define( 'WP_MEMORY_LIMIT', '256M' );

border-radius: 50px 0px 50px 0px;

.scale {
    transition: all 0.3s ease-in-out;
}

.scale:hover {
    transform: scale(1.1);
}

@media only screen and (max-width: 767px) {
    .scale:hover {
        transform: none;
    }
}


/ rotate /

.rotate {
    transition: all 0.3s ease-in-out;
}

.rotate:hover {
    transform: rotate(-5deg);
}

@media only screen and (max-width: 767px) {
    .rotate:hover {
        transform: none;
    }
}


/ position /

.position {
    transition: all 0.3s ease-in-out;
}

.position:hover {
    transform: translate(0, -100px);
}

@media only screen and (max-width: 767px) {
    .position:hover {
        transform: none;
    }
}


/ opacity /

.opacity {
    transition: all 0.3s ease-in-out;
    opacity: 0.5;
}

.opacity:hover {
    opacity: 1;
}

@media only screen and (max-width: 767px) {
    .opacity:hover {
        transform: none;
    }
}


/ jiggle /

.jiggle {
    transition: all 0.3s cubic-bezier(0.475, 0.985, 0.12, 1.975);
}

.jiggle:hover {
    transform: scale(1.1);
}

@media only screen and (max-width: 767px) {
    .jiggle:hover {
        transform: none;
    }
}

// Create compressed archive
tar -cvzpf <backupfile.tar.gz> <source>

// Create compressed archive excluding files and directories
tar [--exclude='file1.txt'] [--exclude='folder1'] -cvzpf <backupfile.tar.gz> <source>

// Extract archive
tar -xvf file.tar

// Extract compressed archive
tar -xzvf file.tar.gz

// Extract single directory from archive
tar -xzvf file.tar.gz etc

// -c create archive
// -v verbose
// -z compress using gzip
// -p preserve permissions
// -f file
// -x extract

dig +short myip.opendns.com @resolver1.opendns.com