simple form wordpress

functions.php

function createShortCut() {
	ob_start();
	generateFormHTMLCode();
	doTheThing();
	return ob_get_clean();
}

function generateFormHTMLCode(){
	?>
	<div class="front-get-one-form">
		<form action="<?php echo esc_url( $_SERVER['REQUEST_URI'] ); ?>" method="post" role="form" autocomplete="off">
			<div class="form-inline">
				<div class="form-group full-width">
					<label for="one-form-domain" class="sr-only"><?php _e( 'Domain name', 'html5blank' ); ?></label>
					<input id="one-form-domain" class="form-control input-lg" type="text" name="domain" value="" placeholder="domain"/>
					<input class="btn btn-default btn-lg btn-xs-center" type="submit" name="get-one" value="<?php _e( 'Get .one', 'html5blank' ); ?>" />
				</div>
			</div>
		</form>
	</div>
	<?php
}
add_shortcode('magic_form', 'createShortCut');

function doTheThing(){
	if(isset($_POST['get-one'])){
		$domain_to_look_for = sanitize_text_field($_POST['domain']);
		loopAddress($domain_to_look_for);
	}
}

function loopAddress($url){
	if(empty($url)){
		return false; // you candle error request, either here of in the function calling it
	}
	try {
		$process = curl_init();
		curl_setopt($process, CURLOPT_URL, "URL HERE".$url);
		curl_setopt($process, CURLOPT_USERPWD, "USER:PASS");
		curl_setopt($process, CURLOPT_TIMEOUT, 30);
		curl_setopt($process, CURLOPT_RETURNTRANSFER, FALSE);

		curl_setopt($process, CURLOPT_POSTFIELDS, $url);

		$return = curl_exec($process);

		print_r(curl_getinfo($process));

	}catch (Exception $e){

		echo "Error {$e}";
	}
}