(PHP 5, PHP 7)
Returns a list of response headers sent (or ready to send)
array headers_list ( void )
headers_list() will return a list of headers to be sent to the browser / client. To determine whether or not these headers have been sent yet, use headers_sent().
Returns:
Returns a numerically indexed array of headers.
Notes:
Headers will only be accessible and output when a SAPI that supports them is in use.
Examples:
Examples using headers_list()
<?php /* setcookie() will add a response header on its own */ setcookie('foo', 'bar'); /* Define a custom response header This will be ignored by most clients */ header("X-Sample-Test: foo"); /* Specify plain text content in our response */ header('Content-type: text/plain'); /* What headers are going to be sent? */ var_dump(headers_list()); ?>
The above example will output:
array(4) { [0]=> string(23) "X-Powered-By: PHP/5.1.3" [1]=> string(19) "Set-Cookie: foo=bar" [2]=> string(18) "X-Sample-Test: foo" [3]=> string(24) "Content-type: text/plain" }
See also:
header() -
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