php de $url kodu nasıl düzeltebilirim ?

$url  = get_permalink( get_option( 'page_for_posts' ) );

<a href="#" class="example-button os_trigger_booking" data-selected-service="2">Book Haircut</a>

$url  = <a href="#" class="example-button os_trigger_booking" data-selected-service="2">Book Haircut</a>

<?php $url = 'https://sitelink';?>

$u = get_permalink( get_option( 'page_for_posts' ) );
$url = '<a href="'.$u.'" class="example-button os_trigger_bookin data-selected-service="2">Book Haircut</a>';

[FONT=consolas][FONT=consolas]
$u = get_permalink( get_option( 'page_for_posts' ) );[/FONT]
$url = '<a href="'.$u.'"[COLOR=#515365][FONT=consolas, bitstream vera sans mono, courier new, Courier, monospace] [/FONT][/COLOR]class="example-button os_trigger_booking"[COLOR=#515365][FONT=consolas, bitstream vera sans mono, courier new, Courier, monospace] [/FONT][/COLOR]data-selected-service="2">Book Haircut</a>';

[/FONT]

get_permalink( get_option( 'page_for_posts'[COLOR=#515365][FONT=consolas, bitstream vera sans mono, courier new, Courier, monospace] [/FONT][/COLOR]) );

$url= '<a href="'.$u.'" class="example-button os_trigger_bookin data-selected-service="2">Book Haircut</a>';

<a href="<?php echo $url ?>" class="example-button os_trigger_booking" data-selected-service="2">Book Haircut</a>