How to receive http request header information with PHP

This article mainly talks about using PHP to receive HTTP request header information. It has certain reference value. Interested friends can learn about it.

1. PHP comes with the function getallheaders()

• Currently getallheaders() can only be used in apache. If you want to use it in nginx, you can use a custom function.

foreach (getallheaders() as $name => $value) {    
echo "$name: $value\n";
}

2. Custom function

function em_getallheaders()
{
    $headers = [];
    foreach ($_SERVER as $name => $value) {
        if (substr($name, 0, 5) == 'HTTP_') {
            $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
        }
    }
    return $headers;
}

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