Getting HTTP code in PHP using curl - php

Question

I'm using CURL to get the status of a site, if it's up/down or redirecting to another site. I want to get it as streamlined as possible, but it's not working well.
<?php
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_TIMEOUT,10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
return $httpcode;
?>
I have this wrapped in a function. It works fine but performance is not the best because it downloads the whole page, thing in if I remove $output = curl_exec($ch); it returns 0 all the time.
Does anyone know how to make the performance better?

Answer 1

First make sure if the URL is actually valid (a string, not empty, good syntax), this is quick to check server side. For example, doing this first could save a lot of time:
if(!$url || !is_string($url) || ! preg_match('/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i', $url)){
return false;
}
Make sure you only fetch the headers, not the body content:
#curl_setopt($ch, CURLOPT_HEADER , true); // we want headers
#curl_setopt($ch, CURLOPT_NOBODY , true); // we don't need body
For more details on getting the URL status http code I refer to another post I made (it also helps with following redirects):
How can I check if a URL exists via PHP?
As a whole:
$url = 'http://www.example.com';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, true); // we want headers
curl_setopt($ch, CURLOPT_NOBODY, true); // we don't need body
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_TIMEOUT,10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo 'HTTP code: ' . $httpcode;

Answer 2

// must set $url first....
$http = curl_init($url);
// do your curl thing here
$result = curl_exec($http);
$http_status = curl_getinfo($http, CURLINFO_HTTP_CODE);
curl_close($http);
echo $http_status;

Answer 3

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_TIMEOUT, 20);
$rt = curl_exec($ch);
$info = curl_getinfo($ch);
echo $info["http_code"];

Answer 4

Try PHP's "get_headers" function.
Something along the lines of:
<?php
$url = 'http://www.example.com';
print_r(get_headers($url));
print_r(get_headers($url, 1));
?>

Answer 5

curl_getinfo — Get information regarding a specific transfer
Check curl_getinfo
<?php
// Create a curl handle
$ch = curl_init('http://www.yahoo.com/');
// Execute
curl_exec($ch);
// Check if any error occurred
if(!curl_errno($ch))
{
$info = curl_getinfo($ch);
echo 'Took ' . $info['total_time'] . ' seconds to send a request to ' . $info['url'];
}
// Close handle
curl_close($ch);

Answer 6

curl_exec is necessary. Try CURLOPT_NOBODY to not download the body. That might be faster.

Answer 7

use this hitCurl method for fetch all type of api response i.e. Get / Post
function hitCurl($url,$param = [],$type = 'POST'){
$ch = curl_init();
if(strtoupper($type) == 'GET'){
$param = http_build_query((array)$param);
$url = "{$url}?{$param}";
}else{
curl_setopt_array($ch,[
CURLOPT_POST => (strtoupper($type) == 'POST'),
CURLOPT_POSTFIELDS => (array)$param,
]);
}
curl_setopt_array($ch,[
CURLOPT_URL => $url,
CURLOPT_RETURNTRANSFER => true,
]);
$resp = curl_exec($ch);
$statusCode = curl_getinfo($ch,CURLINFO_HTTP_CODE);
curl_close($ch);
return [
'statusCode' => $statusCode,
'resp' => $resp
];
}
Demo function to test api
function fetchApiData(){
$url = 'https://postman-echo.com/get';
$resp = $this->hitCurl($url,[
'foo1'=>'bar1',
'foo2'=>'bar2'
],'get');
$apiData = "Getting header code {$resp['statusCode']}";
if($resp['statusCode'] == 200){
$apiData = json_decode($resp['resp']);
}
echo "<pre>";
print_r ($apiData);
echo "</pre>";
}

Answer 8

Here is my solution need get Status Http for checking status of server regularly
$url = 'http://www.example.com'; // Your server link
while(true) {
$strHeader = get_headers($url)[0];
$statusCode = substr($strHeader, 9, 3 );
if($statusCode != 200 ) {
echo 'Server down.';
// Send email
}
else {
echo 'oK';
}
sleep(30);
}