如何僅打印頁面加載時間一次

Question

enter code here 

    $loadMessageDisplayed = FALSE; 
    function file_get_contents_curl($url){ 
    global $loadMessageDisplayed; 
    $ch = curl_init(); 

    curl_setopt($ch, CURLOPT_HEADER, 0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt($ch, CURLOPT_URL, $url); 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 

    $data = curl_exec($ch); 

//PAGE LOAD TIME 
    if(!curl_errno($ch) && !$loadMessageDisplayed){ 
      $cinfo = curl_getinfo($ch); 
      echo 'Page loaded in '.$cinfo['total_time'].' seconds'; 
      $loadMessageDisplayed = TRUE; 
    } 

    curl_close($ch); 
    return $data; 
} 

我只想顯示頁面加載時間一次。再次，如果我調用相同的功能，它不應該顯示我加載時間。

Answer 1

function file_get_contents_curl($url) 
{ 

    $ch = curl_init(); 

    curl_setopt($ch, CURLOPT_HEADER, 0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt($ch, CURLOPT_URL, $url); 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 

    $data = curl_exec($ch); 

    //PAGE LOAD TIME 
    if (!defined('constant')) { 
     define('constant', 'value'); 

     if (!curl_errno($ch)) { 
      $cinfo = curl_getinfo($ch); 
      echo 'Page loaded in ' . $cinfo['total_time'] . ' seconds'; 
     } 
    } 

    curl_close($ch); 
    return $data; 
}