forminator-upload-image-width-height-limit.php

<?php 
/**
* Plugin Name: Forminator - image upload width/height limit
* Plugin URI:  https://gist.github.com/adczk
* Description: Sets custom width/size image limit for upload fields
* Author:      adczk
*
* Author URI:  https://gist.github.com/adczk
* License:     GPLv2 or later
*
* Use as MU plugin; 
*
* Tested with Forminatro 1.30.2
*
* NOTE: THIS IS ONLY BETA/DEV CODE, it is not fully tested and may not work in 100% cases
* 
* USE ONLY WITH UPLOAD FIELDS SET TO "SINGLE" upload mode!!!
*
* Update May 29th 2024 - support for separate limits for different upload fileds
*/

add_filter( 'forminator_custom_form_submit_errors', 'wpmudev_upload_image_dimensions_error', 99, 3 );
function wpmudev_upload_image_dimensions_error( $submit_errors, $form_id, $field_data_array ) {
	
	
	## CONFIG ##
	$form_ids = array( 3010, 123 ); // form IDs - one or more; if more - separate numbers with commas
	$fields_ids = array( 'upload-1', 'upload-2', 'upload-3' ); // IDs of fields to check, one or more, if more - separate with commas
	
	// max image sizes per each upload field (note no comma after last upload field line
	// if size not defined here but field defined in $fields_ids, a "fallback" value below
	// will be used
	$max_sizes = array( 
		'upload-1' => array( 'width'=>500, 'height'=>500 ),
		'upload-2' => array( 'width'=>150, 'height' => 200 )
	);
	
	// fallback sizes, if not defined per field above
	$max_width = 20; // max image width in px - fallback if not defined per field
	$max_height = 50; // max image height in px - fallback if not defined per field
	
	$err_msg = 'Maximum image width/height: [wdt] x [hdt]!'; // custom error message for width/height; [wdt] and [hdt] will be replaced with max width/height accordingly. 
	
	$no_image_msg = 'Error fetching image sizes!'; // other error e.g. if it's not image file or doesn't exist due to upload issues
	## END OF CONFIG; DO NOT EDIT BELOW ##
	
	if ( !in_array( $form_id, $form_ids ) ) {
		return $submit_errors; // just bail out and skip checks
	}
	
	// check form fields to find uploads 
	foreach( $field_data_array as $key => $value ) {
		$field_name = $value['name'];
		// if field is defined upload field, check it 
		if ( in_array( $field_name, $fields_ids ) ) {
			
			
			$max_width_image = $max_width;
			$max_height_image = $max_height;
			// get field-specific limits if set
			if ( array_key_exists( $field_name, $max_sizes ) ) {
				$max_width_image = $max_sizes[$field_name]['width'];
				$max_height_image = $max_sizes[$field_name]['height'];
			}			
			
			
			// get temp path of the uploaded file 
			$temp_image = $value['value']['file']['tmp_name'];
			if ( empty( $temp_image) ) {
				$temp_image = $value['value']['file']['file_path'];
			}
			if ( file_exists( $temp_image ) ) {
				
				// try to get size
				$temp_image_size = wp_getimagesize( $temp_image );
				
				// if success, check width/height;
				if ( is_array( $temp_image_size) ) {
					$width = $temp_image_size[0];
					$height = $temp_image_size[1];
					
					// now compare against max
					if ( ( $width > $max_width_image) || ( $height > $max_height_image ) ) {
						// and if width or height bigger than max issue error
						$submit_errors[][$field_name] = str_replace( '[hdt]', $max_height_image, str_replace( '[wdt]', $max_width_image, $err_msg ) );;
					}					
					
				} else {
					error_log('EXISTS - NO SIZE');
					// if could't get sizes
					$submit_errors[][$field_name] = $no_image_msg;
				}
				
			} else {
				// if temp upload file doesn't exist (e.g. due to upload error
				$submit_errors[][$field_name] =  $no_image_msg;
			}
						
		}
	}
	return $submit_errors;
}