Question

I have a script that checks a website ($host) for an string of characters ($find). If the string exists the nothing happens, if the string is not found then an email is sent to a pre-set email address.

The problem I have is that I need to have an array of URL’s and I believe a second array of text. The text in the array needs to match up to the URL’s in the array.

Perhaps storing the URL’s and text in a text file(s) might be a better solution.

Here is the script as it is right now, working on the single domain.

<?php
    $host = 'www.my-domain.com';
    $find = 'content on my page';

    function check($host, $find) {
        $fp = fsockopen($host, 80, $errno, $errstr, 10);
        if (!$fp) {
            echo "$errstr ($errno)\n";
        } else {
           $header = "GET / HTTP/1.1\r\n";
           $header .= "Host: $host\r\n";
           $header .= "Connection: close\r\n\r\n";
           fputs($fp, $header);
           while (!feof($fp)) {
               $str.= fgets($fp, 1024);
           }
           fclose($fp);
           return (strpos($str, $find) !== false);
        }
    }


    function alert($host) {
        mail('[e-mail]', 'Monitoring', $host.' down');
    }

    if (!check($host, $find)) alert($host);

    ?>

New code with array in place:

$hostMap = array(
    'www.my-domain.com' => 'content on site',
    'www.my-domain2.ca' => 'content on second site',
 );

foreach ($hostMap as $host => $find)
{
        function check($host, $find)
        {
                $fp = fsockopen($host, 80, $errno, $errstr, 10);
                if (!$fp)
                {
                        echo "$errstr ($errno)\n";
                } else {
                        $header = "GET / HTTP/1.1\r\n";
                        $header .= "Host: $host\r\n";
                        $header .= "Connection: close\r\n\r\n";
                        fputs($fp, $header);
                        while (!feof($fp)) {
                                $str.= fgets($fp, 1024);
                        }
                        fclose($fp);
                        return (strpos($str, $find) !== false);
                }
        }

        function alert($host)
        {
                mail('[e-mail]', 'Website Monitoring', $host.' is down');
        }

        print $host;
        print $find;

//if (!check($host, $find)) alert($host);

        if( !check( $host, $find ) )
        {
                alert($host);
        }
}

?>

Moved the functions outside of the foreach(

ini_set( 'display_errors', true );
        $hostMap = array(
        'www.my-domain.com' => 'content on site',
        'www.my-domain2.ca' => 'content on second site',
     );

          function check($host, $find)
            {
                    $fp = fsockopen($host, 80, $errno, $errstr, 10);
                    if (!$fp)
                    {
                            echo "$errstr ($errno)\n";
                    } else {
                            $header = "GET / HTTP/1.1\r\n";
                            $header .= "Host: $host\r\n";
                            $header .= "Connection: close\r\n\r\n";
                            fputs($fp, $header);
                            while (!feof($fp)) {
                                    $str.= fgets($fp, 1024);
                            }
                            fclose($fp);
                            return (strpos($str, $find) !== false);
                    }
            }

            function alert($host)
            {
                    mail('[e-mail]', 'Website Monitoring', $host.' is down');
            }

            print $host;
            print $find;

    //if (!check($host, $find)) alert($host);
    foreach ($hostMap as $host => $find)
    {

            if( !check( $host, $find ) )
            {
                    alert($host);
            }
    }

    ?>

Here is the final code with a working Array in case anyone else wants a solution like this.

    function check($host, $find)
    {
        $fp = fsockopen($host, 80, $errno, $errstr, 10);
        if (!$fp)
            {
                            echo "$errstr ($errno)\n";
                        } else {
                            $header = "GET / HTTP/1.1\r\n";
                            $header .= "Host: $host\r\n";
                            $header .= "Connection: close\r\n\r\n";
                            fputs($fp, $header);
                            while (!feof($fp)) {
                                    $str.= fgets($fp, 1024);
                            }
                            fclose($fp);
                            return (strpos($str, $find) !== false);
                        }
    }

function alert($host)
    {
        $headers = 'From: Set your from address here';
        mail('[e-mail]', 'Website Monitoring', $host.' is down' $headers);
    }

$hostMap = array(
'www.my-domain.com' => 'content on site',
'www.my-domain2.com' => 'content on second site',
);

    //if (!check($host, $find)) alert($host);
    foreach ($hostMap as $host => $find)
    {

            if( !check( $host, $find ) )
            {
                    alert($host);
            }
    }
unset($host);
unset($find);

?>

Answer 1

$hostMap = array(
    'www.my-domain.com' => 'content on my page',
    /* etc. */
);

foreach( $hostMap as $host => $find )
{
    if( !check( $host, $find ) )
    {
         alert($host);
    }
}

However, be aware that — depending on the amount of domains you are checking — sequentially mailing large amounts of mails with PHP’s native mail() is not very efficient. You may wanna look in to more specialized mail libraries for that, such as SwiftMailer.

On the other hand — seeing you are mailing one and the same e-mail address — you could also simply save the failing domains in an array, and mail them all in one e-mail after you’re done checking of course.