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I am new to PHP. I am trying to get the Header from the response after sending the php curl POST request. The client sends the request to the server and server sends back the response with Header. Here is how I sent my POST request.

 $client = curl_init($url); curl_setopt($client, CURLOPT_CUSTOMREQUEST, "POST"); curl_setopt($client, CURLOPT_POSTFIELDS, $data_string); curl_setopt($client, CURLOPT_HEADER, 1); $response = curl_exec($client); var_dump($response);

Here is the Header response from server that I get from the browser

HTTP/1.1 200 OK Date: Wed, 01 Feb 2017 11:40:59 GMT Authorization: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2Vycy9CYW9CaW5oMTEwMiIsIm5hbWUiOiJhZG1pbiIsInBhc3N3b3JkIjoiMTIzNCJ9.kIGghbKQtMowjUZ6g62KirdfDUA_HtmW-wjqc3ROXjc Content-Type: text/html;charset=utf-8 Transfer-Encoding: chunked Server: Jetty(9.3.6.v20151106)

How can I extract the Authorization part from the Header ?. I need to store it in the cookies

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4

4 Answers 4

Reset to default
40

It converts all headers into an array

// create curl resource $ch = curl_init(); // set url curl_setopt($ch, CURLOPT_URL, "example.com"); //return the transfer as a string curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //enable headers curl_setopt($ch, CURLOPT_HEADER, 1); //get only headers curl_setopt($ch, CURLOPT_NOBODY, 1); // $output contains the output string $output = curl_exec($ch); // close curl resource to free up system resources curl_close($ch); $headers = []; $output = rtrim($output); $data = explode("\n",$output); $headers['status'] = $data[0]; array_shift($data); foreach($data as $part){ //some headers will contain ":" character (Location for example), and the part after ":" will be lost, Thanks to @Emanuele $middle = explode(":",$part,2); //Supress warning message if $middle[1] does not exist, Thanks to @crayons if ( !isset($middle[1]) ) { $middle[1] = null; } $headers[trim($middle[0])] = trim($middle[1]); } // Print all headers as array echo "<pre>"; print_r($headers); echo "</pre>";
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6 Comments

Good answer, although you don't account for trailing newlines, or null values. You may get warnings: Notice: Undefined offset: 1. I'm going to suggest an edit for review.
My edit was rejected as @user75ponic believes it is "superfluous". Sorry, but he's wrong. @Thamaraiselvam As my previous comment stated, your code does not account for trailing newlines which can, and often does, exist in header returns. The existence of a trailing newline causes this code to break entirely. Use rtrim($output) to fix that. You also don't handle null values at all and you will receive PHP warnings should any header contain a null value, again, a possibility. You can handle this like so: if ( !isset($middle[1]) ) { $middle[1] = null; }.
@Crayons I will check and do the necessary changes +1
I suggest also to replace $middle=explode(":",$part); with $middle=explode(":",$part,2); because some headers will contain ":" character (Location for example), and the part after ":" will be lost.
@Crayons Thanks for your inputs and answer updated.
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For the first answer note that the code: 

$middle=explode(":",$part);

will produce wrong results with string data containing :, like for example:

Sat, 14 Jan 2017 01:10:01 GMT

The correct code to split the fields to build the array would be like:

$middle=explode(":",$part,2);
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Comments

-1

You just include this coding into your curl request

curl_setopt($curl_exec, CURLOPT_HEADER, true); curl_setopt($curl_exec, CURLOPT_NOBODY, true);

after your curl execution use $header_data= curl_getinfo($curl_exec);

Then you get all the headers

print_r($header_data);

or use the shell_exec 

echo shell_exec("curl -I http://example.com ");
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2 Comments

This gets the header of the request rather than the header of the response.
curl_getinfo() still doesn't return the response headers when you use the above code. But setting CURLOPT_HEADER and CURLOPT_NOBODY does make curl_exec() return only the response headers. Which is maybe useful if that's what you want, but the problem then is you only got the response headers and not the response body, and usually you want both.
-4

just use simple code to convert curl response to array.

 $response = curl_exec($ch); $header_data= curl_getinfo($ch); print_r($header_data);
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1 Comment

This gets the headers of the request rather than the headers of the response.

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