PHP | get_headers() Function
The get_headers() function in PHP is used to fetch all the headers sent by the server in the response of an HTTP request.
Syntax:
get_headers( $url, $format, $context )
Parameters: This function accepts three parameters as mentioned above and described below:
- $url: It is a mandatory parameter of type string. It defines the target URL.
- $format: It is an optional parameter of type int. If its value is set to non-zero it will return an associative array otherwise indexed array.
- $context: It holds the valid resource context created by stream_context_create() function.
Example 1: In this example, value of optional parameter $format is not assigned.
<?php // Target URL $url = "https://www.w3wiki.net" ; // Fetching headers $headers = get_headers( $url ); // Printing headers print_r( $headers ); ?> |
Output:
Array ( [0] => HTTP/1.1 200 OK [1] => Content-Type: text/html; charset=UTF-8 [2] => Connection: close [3] => Date: Sun, 19 May 2019 08:31:29 GMT [4] => Server: Apache [5] => Strict-Transport-Security: max-age=3600; includeSubDomains [6] => Cache-Control: s-maxage=21600, max-age=3, must-revalidate [7] => Access-Control-Allow-Credentials: true [8] => X-Frame-Options: DENY [9] => X-Content-Type-Options: nosniff [10] => Vary: Accept-Encoding, Cookie [11] => X-Cache: Miss from cloudfront [12] => Via: 1.1 aa0bb866c09b4e243eb9a97bcdb7fe32.cloudfront.net (CloudFront) [13] => X-Amz-Cf-Id: QAOIIj4eBsrX0hyZ-UHjOtqA2dQePcLbEUZJ3KRohjsSPfcrcAFaiQ== )
Example 2: In this example, value of optional parameter $format is set to non-zero.
<?php // Target URL $url = "https://www.w3wiki.net" ; // Fetching headers $headers = get_headers( $url , 1); // Printing headers print_r( $headers ); ?> |
Output:
Array ( [0] => HTTP/1.1 200 OK [Content-Type] => text/html; charset=UTF-8 [Connection] => close [Date] => Sun, 19 May 2019 08:35:47 GMT [Server] => Apache [Strict-Transport-Security] => max-age=3600; includeSubDomains [Cache-Control] => s-maxage=21600, max-age=3, must-revalidate [Access-Control-Allow-Credentials] => true [X-Frame-Options] => DENY [X-Content-Type-Options] => nosniff [Vary] => Accept-Encoding, Cookie [X-Cache] => Miss from cloudfront [Via] => 1.1 95d17b4d563934eb90636ad03f8f524e.cloudfront.net (CloudFront) [X-Amz-Cf-Id] => se3QRyaWDeuHI3GrisMzAr4FJBamqMtbUNzhTPqAJhBoQZbWvy3UPw== )
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