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PHP header_register_callback() Function

❮ PHP Network Reference

Example

A getservbyname() example:

<?php
$portnum = getservbyname("http", "tcp");
echo $portnum;
?>


Definition and Usage

The header_register_callback() function calls a header function (will be executed after PHP has prepared all headers to be sent, and before any other output is sent).

Syntax

header_register_callback(callback)
Parameter Description
callback Required. Specifies a callback function

Technical Details

Return Value: TRUE on success. FALSE on failure
PHP Version: 5.4+

❮ PHP Network Reference