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HTTP Headers
Transphporm supports setting HTTP Headers. You must target an element on the page such as HTML and you can use the :header pseudo element to set a HTTP header. For example a redirect can be done like this:
html:header[location] {content: "/redirect-url"; }Transphporm does not directly write HTTP headers. The return value of the output() function is an array consisting of a body and headers. body is the rendered HTML code and headers contains any HTTP headers which have been set.
$xml = '<html><div>Foo</div></html>';
$tss = 'html:header[location] {content: "/redirect-url"; }';
$template = new \Transphporm\Builder($xml, $tss);
print_r($template->output());Will print:
Array (
'body' => '<html><div>foo</div></html>',
'headers' => Array (
Array (
[0] => 'location',
[1] => '/redirect-url'
)
)
)To actually send the headers to the browser you need to manually call the header command:
foreach ($template->output()->headers as $header) {
header($header[0] . ': ' . $header[1]);
}In most cases, you will want to conditionally display a header. For example:
- Redirect on success.
- Send a 404 header when a record could not be found.
To do this, you can use conditional data lookups:
class Model {
public function getProduct() {
return false;
}
}
$tss = 'html:data[getProduct='']:header[status] {content: '404'}
$xml = '<html></html>';
$data = new Model;
$template = new \Transphporm\Builder($xml, $tss);
$output = $template->output($data);
print_r($output->headers)Prints:
Array (
[0] => 'status',
[1] => '404'
)To use this, you should then call the inbuilt php http_response_code function with this status:
foreach ($template->output()->headers as $header) {
if ($header[0] === 'status') http_response_code($header[1]);
else header($header[0] . ': ' . $header[1]);
}Transphporm does not send any output to the browser by default. This is for maximum flexibility. You still must manually send the headers and echo the body.