getmxrr - PHP code example

PHP Function Getmxrr

A function is a piece of code that takes input in the form of parameters, processes them, and returns a value. It is a useful way to break large pieces of complex code into smaller components that are easier to understand and debug. PHP has thousands of built-in functions that can perform a variety of tasks.

To make a function in PHP, you need to write the name of the function followed by parenthesis which will contain the parameters for the function. The number of parameters for a function can be up to any number that you want. However, the arguments must be separated by comma. In addition, the function should have a return statement which will return the final result of the function.

Another interesting thing about php function getmxrr is that it uses camel case, meaning all letters begin with a lowercase letter and only capitalized for the first word. Also, the function’s parameter names must always be declared using the same format, as well as the data type they represent. This is because, if the parameter name does not match the data type, it will generate a fatal error.

When you call a function in PHP, the engine will push all of the parameter values onto a stack. Then, at runtime, the function can read the stack to determine what values were passed to it. In addition, if you use the SensitiveParameter attribute in PHP 8, then any sensitive parameter value (such as passwords or credentials) will not be displayed in a stack trace if an exception is generated by the function.

getmxrr example

public function testGetmxrr()
    {
        DnsMock::withMockedHosts([
            'example.com' => [[
                'type' => 'MX',
                'host' => 'mx.example.com',
                'pri' => 10,
            ]],
        ]);

        $this->assertFalse(DnsMock::getmxrr('foobar.com', $mxhosts, $weight));
        $this->assertTrue(DnsMock::getmxrr('example.com', $mxhosts, $weight));
        $this->assertSame(['mx.example.com'], $mxhosts);
        $this->assertSame([10], $weight);
    }

    public function testGethostbyaddr()
    {
        DnsMock::withMockedHosts([
            'example.com' => [
                [
                    'type' => 'A',

return $result;
    }

    /** * Internal method to validate the servers MX records * * @return boolean */
    private function _validateMXRecords()
    {
        $mxHosts = array();
        $result = getmxrr($this->_hostname, $mxHosts);
        if (!$result) {
            $this->_error(self::INVALID_MX_RECORD);
        } else if ($this->_options['deep'] && function_exists('checkdnsrr')) {
            $validAddress = false;
            $reserved     = true;
            foreach ($mxHosts as $hostname) {
                $res = $this->_isReserved($hostname);
                if (!$res) {
                    $reserved = false;
                }

        return false;
    }

    /** * @return bool */
    public static function getmxrr($hostname, &$mxhosts, &$weight = null)
    {
        if (!self::$hosts) {
            return \getmxrr($hostname, $mxhosts, $weight);
        }
        $mxhosts = $weight = [];

        if (isset(self::$hosts[$hostname])) {
            foreach (self::$hosts[$hostname] as $record) {
                if ('MX' === $record['type']) {
                    $mxhosts[] = $record['host'];
                    $weight[] = $record['pri'];
                }
            }
        }