PHP: Display page render time

admin — Fri, 12 Jun 2009 19:06:20 +0000

Here’s what I currently use to determine how long it takes to generate a page in PHP. Its only 4 lines of code.

PHP 5

$time_start = microtime(true); $time_end = microtime(true); $time = $time_end - $time_start; echo "Displaying the render time: $time seconds\n";

PHP 4 Version: (8 lines)

Put this at the top of the PHP script:
$render_time_start = microtime_float();

Put this at the end of the script:
$render_time_end = microtime_float(); $render_time = $render_time_end - $render_time_start; echo $render_time;

function microtime_float(){ list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); }

PHP Uptime check

admin — Mon, 24 Nov 2008 21:49:33 +0000

I found a useful script in PHP that can be used for checking uptime of a server. It can be useful for checking when the servers have a such a significant load that pages can’t be displayed. The benefit or running it locally is that I can configure the script to perform failover functionality if necessary. Online uptime services are good too, but most of them aren’t free. Maybe I should force the server to show a failwhale when the site gets too busy… j/k

Here’s the link to the script.
http://www.programmingtalk.com/showthread.php?t=34999

// the URL you want to keep tabs on $url = 'http://www.somewebsite.com';


// if not available, send email

if ( url_exists( $url ) === FALSE )

{

    $to   = 'my@email.com';

    $subj = $url . ' is down!';

    $msg  = $url . ' was tested at ' . date( 'Y-m-d H:i:s' ) . ' and was inaccessible.';

    @mail( $to, $subj, $msg );

} 
/**

 * url_exists()

 * Checks for the validity of a given URL

 *

 * @param string The http[s] URL you're checking for

 * @return bool TRUE if online; FALSE if not; NULL if not an http(s):// URL

 */

function url_exists( $strURL = NULL )

{

    if ( !preg_match( '/^http(s?):\/\//i', $strURL, $m ) )

        return NULL;

    @$ch = curl_init();

    curl_setopt( $ch, CURLOPT_URL, $strURL );

    curl_setopt( $ch, CURLOPT_BINARYTRANSFER, 1 );

    curl_setopt( $ch, CURLOPT_HEADERFUNCTION, 'curlHeaderCallback' );

    curl_setopt( $ch, CURLOPT_FAILONERROR, 1 );

    curl_setopt( $ch, CURLOPT_TIMEOUT, 5 );

    // https?

    if ( $m[1] == 's' )

        curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 );

    @curl_exec( $ch );

    $intReturnCode = curl_getinfo( $ch, CURLINFO_HTTP_CODE );

    curl_close( $ch );

    return ( $intReturnCode == 200 OR $intReturnCode == 302 OR $intReturnCode == 304 ) ? TRUE : FALSE;

}

?>

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PHP: Display page render time

PHP Uptime check