How to create a functions.php in child theme? [closed]

You need to remove the space between <? and php at the very start of your file.

Incorrect:

<? php

add_action('iphorm_post_process_1', 'mytheme_create_wp_post', 10, 1);
function mytheme_create_wp_post($form)
{

Correct:

<?php

add_action('iphorm_post_process_1', 'mytheme_create_wp_post', 10, 1);
function mytheme_create_wp_post($form)
{

This is causing a simple syntax error.