[Forminator] - Custom form submission date format

forminator-submission-date-format.php

<?php
/**
 * Plugin Name: [Forminator] - Custom form submission date format (Rev.1)
 * Description: This MU Plugin allows the usage of a custom date format for the Submission page
 * Author: Anderson Salas @ WPMUDEV
 * Task: SLS-3998
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */

//
// NOTE: This doesn't affect the Quizzes/Polls submission date format. That date format
//       is taken from the Settings > General > Date Format section at the WP Admin.
//

add_action( 'plugins_loaded', function(){
	// >>> [ Snippet settings BEGIN ] -------------------------------------------------
	$new_format = 'd.m.Y @ g:i';
	// >>> [ Snippet settings END ] ---------------------------------------------------

	add_filter( 'forminator_custom_form_entries_iterator', function( $iterator, $entry ) use ( $new_format ) {
		$dates = array();

		if ( ! empty( $iterator['entry_date'] ) ) {
			$dates[] = &$iterator['entry_date'];
		}

		if ( ! empty( $iterator['summary']['items'][1]['value'] ) ) {
			$dates[] = &$iterator['summary']['items'][1]['value'];
		}

		if ( ! empty( $iterator['detail']['items'][0]['value'] ) ) {
			$dates[] = &$iterator['detail']['items'][0]['value'];
		}

		foreach ( $dates as &$date ) {
			try {
				$new_date = \DateTime::createFromFormat( "M d, Y \@ g:i A", $date );	
			} catch ( \Exception $e ) {
				$new_date = null;
			}
			if ( null !== $new_date ) {
				$date = $new_date->format( $new_format );
			}
		}
		
		return $iterator;
	}, 10, 2 );


	if ( ! is_admin() || ( ! current_user_can( 'manage_options' ) && ! current_user_can( 'manage_forminator' ) ) ) {
		return;
	}

	$nonce = ! empty( $_POST['_forminator_nonce'] ) 
		? sanitize_text_field( wp_unslash( $_POST['_forminator_nonce'] ) )
		: '';

	if ( ! wp_verify_nonce( $nonce, 'forminator_export' ) ) {
		return;
	}

	add_filter( 'forminator_addon_slugs_from_entry_model', function( $addon_slugs, $entry_model, $addon_metadata_pattern_prefix ) {
		$GLOBALS['_for_ee'][] = $entry_model;
		return $addon_slugs;
	}, 10, 3);
	
	add_filter( 'forminator_custom_form_export_mappers', function( $mappers, $model_id, $model ) use ( $new_format ) {
		$GLOBALS['_for_ee']   = array();
		$GLOBALS['_for_ee_i'] = 0;
		$cloned_meta_key      = $mappers[1]['meta_key'] ?? false;
	
		if ( false === $cloned_meta_key ) {
			return $mappers;
		}
	
		if ( ! empty( $mappers[0]['property'] ) && 'time_created' === $mappers[0]['property'] ) {
			$mappers[0] = array( 
				'meta_key' => $cloned_meta_key,
				'label'    => esc_html__( 'Submission Time', 'forminator' ),
				'type'     => '%%DATE%%',
			);
			add_filter( 'forminator_entry_meta_value_to_string', function( $string_value, $field_type, $meta_value, $allow_html, $truncate ) use ( $new_format ) {
				if ( '%%DATE%%' === $field_type ) {
					if ( isset( $GLOBALS['_for_ee'][ $GLOBALS['_for_ee_i'] ] ) ) {
						$entry = $GLOBALS['_for_ee'][ $GLOBALS['_for_ee_i']++ ];
						$date  = date( $new_format, strtotime( $entry->date_created_sql ) );
						return $date ?? $entry->time_created;
					}
					return $string_value;
				}
				return $string_value;
			}, 10, 5 );
		}
		return $mappers;
	}, 10, 3 );
});

In my case $new_date was false and the script crashed. I fixed it in my fork.