Backlink Checker

class_fb_backlink_checker.php

<?php
/**
Example of use: 

$bl_check = new Fb_Backlink_Checker( 'http://www.example.com', 'http://other.com' ); 
$bl_check->get_contents(); 
$bl_check->fetch_links(); 

if ( TRUE !== $bl_check->check() ) { 
	echo 'Backlink not found.'; 
}else{ 
	echo 'Backlink found'; 
}
*/

class Fb_Backlink_Checker {
	
	var $url; 
	var $content; 
	var $links; 
	var $link_to_check; 

	function __construct( $url, $link_to_check ) { 
		
		$this->url = $url; 
		$this->link_to_check = $link_to_check; 
	}
	
	function set_link_to_check( $link ) {
		
		$this->link_to_check = $link; 
	}
	
	function get_contents() { 
	
	 $this->content = file_get_contents( $this->url ); 
	}  
	
	function fetch_links() {
	
		$regexp = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>(.*)<\/a>";
		preg_match_all( "/$regexp/siU", $this->content, $matches );
		$this->links = $matches;
		
		return $matches; 
	}
	
	function check() {
	
		foreach( $this->links[2] as $key => $url ) {
			if ( $this->link_to_check == $url 
				return TRUE; 
		}
		
		return FALSE;	
	}
	
} // end class

example.php

<?php
// Example of use: 
$bl_check = new Fb_Backlink_Checker( 'http://www.example.com', 'http://other.com' ); 
$bl_check->get_contents(); 
$bl_check->fetch_links(); 

if ( TRUE !== $bl_check->check() ) { 
	echo 'Backlink not found.'; 
}else{ 
	echo 'Backlink found'; 
}

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