نوفالو کردن لینک های خارجی پیکوفایل

nofollow-specific-domain.php

<?php
/**
 * Add "nofollow" to picofile external links
 */
function ywp_nofollow_picofile_extrenal_links( $content ) {
    $domain = "https://www.picofile.com";

    preg_match_all( '~<a.*>~isU', $content, $matches );

    for ( $i = 0; $i <= count( $matches[0] ); $i ++ ) {
        if ( isset( $matches[0][ $i ] ) && ! preg_match( '~nofollow~is', $matches[0][ $i ] )
             && ( preg_match( '~' . preg_quote( $domain ) . '~', $matches[0][ $i ] )
                  || ! preg_match( '~' . get_bloginfo( 'url' ) . '~', $matches[0][ $i ] ) )
        ) {
            $result = trim( $matches[0][ $i ], ">" );
            $result .= ' rel="nofollow">';
            $content = str_replace( $matches[0][ $i ], $result, $content );
        }
    }

    return $content;
}

add_filter( 'the_content', 'ywp_nofollow_picofile_extrenal_links' );

// The code goes to your active theme(or child theme) functions.php file.