<?php
    $a = 'http://www.soccerfitness.com/testing/2/2-yo-yo-endurance-test';
//  $a = 'http://belatmos.blogspot.com/2012/12/snow.html?showComment=1376946597608';
    $contents = file_get_contents($a);

    $site = 'topwritingservices.net';
    $site = str_ireplace('http://', '',$site);
    $site = rtrim( $site, '/' );

    $key = 'topwritingservices.net';
    $pattern = "~<a[\s]+(rel=\"nofollow\"[\s]+)?([^>]*)href=(\"|')http://{$site}[/]?\g{-1}(\g{-3})?([^>]*)>(http://|https://)?({$key})</a>~imu";

    $matched = preg_match_all( $pattern, $contents, $links );

    echo "<br>" . ( !$matched ? 'false': 'true' ) . "\n";

    print_r($links);
?>