firepot

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<?php
/**
** A base module for [file] and [file*]
**/

/* form_tag handler */

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_file', 10, 0 );

function wpcf7_add_form_tag_file() {
	wpcf7_add_form_tag( array( 'file', 'file*' ),
		'wpcf7_file_form_tag_handler',
		array(
			'name-attr' => true,
			'file-uploading' => true,
		)
	);
}

function wpcf7_file_form_tag_handler( $tag ) {
	if ( empty( $tag->name ) ) {
		return '';
	}

$validation_error = wpcf7_get_validation_error( $tag->name );

$class = wpcf7_form_controls_class( $tag->type );

if ( $validation_error ) {
		$class .= ' wpcf7-not-valid';
	}

$atts = array();

$atts['size'] = $tag->get_size_option( '40' );
	$atts['class'] = $tag->get_class_option( $class );
	$atts['id'] = $tag->get_id_option();
	$atts['capture'] = $tag->get_option( 'capture', '(user|environment)', true );
	$atts['tabindex'] = $tag->get_option( 'tabindex', 'signed_int', true );

$atts['accept'] = wpcf7_acceptable_filetypes(
		$tag->get_option( 'filetypes' ), 'attr'
	);

if ( $tag->is_required() ) {
		$atts['aria-required'] = 'true';
	}

if ( $validation_error ) {
		$atts['aria-invalid'] = 'true';
		$atts['aria-describedby'] = wpcf7_get_validation_error_reference(
			$tag->name
		);
	} else {
		$atts['aria-invalid'] = 'false';
	}

$atts['type'] = 'file';
	$atts['name'] = $tag->name;

$html = sprintf(
		'<span class="wpcf7-form-control-wrap" data-name="%1$s"><input %2$s />%3$s</span>',
		esc_attr( $tag->name ),
		wpcf7_format_atts( $atts ),
		$validation_error
	);

return $html;
}

add_action(
	'wpcf7_swv_create_schema',
	'wpcf7_swv_add_file_rules',
	10, 2
);

function wpcf7_swv_add_file_rules( $schema, $contact_form ) {
	$tags = $contact_form->scan_form_tags( array(
		'basetype' => array( 'file' ),
	) );

foreach ( $tags as $tag ) {
		if ( $tag->is_required() ) {
			$schema->add_rule(
				wpcf7_swv_create_rule( 'requiredfile', array(
					'field' => $tag->name,
					'error' => wpcf7_get_message( 'invalid_required' ),
				) )
			);
		}

$schema->add_rule(
			wpcf7_swv_create_rule( 'file', array(
				'field' => $tag->name,
				'accept' => explode( ',', wpcf7_acceptable_filetypes(
					$tag->get_option( 'filetypes' ), 'attr'
				) ),
				'error' => wpcf7_get_message( 'upload_file_type_invalid' ),
			) )
		);

$schema->add_rule(
			wpcf7_swv_create_rule( 'maxfilesize', array(
				'field' => $tag->name,
				'threshold' => $tag->get_limit_option(),
				'error' => wpcf7_get_message( 'upload_file_too_large' ),
			) )
		);
	}
}

add_filter( 'wpcf7_mail_tag_replaced_file', 'wpcf7_file_mail_tag', 10, 4 );
add_filter( 'wpcf7_mail_tag_replaced_file*', 'wpcf7_file_mail_tag', 10, 4 );

function wpcf7_file_mail_tag( $replaced, $submitted, $html, $mail_tag ) {
	$submission = WPCF7_Submission::get_instance();
	$uploaded_files = $submission->uploaded_files();
	$name = $mail_tag->field_name();

if ( ! empty( $uploaded_files[$name] ) ) {
		$paths = (array) $uploaded_files[$name];
		$paths = array_map( 'wp_basename', $paths );

$replaced = wpcf7_flat_join( $paths, array(
			'separator' => wp_get_list_item_separator(),
		) );
	}

return $replaced;
}

/* Tag generator */

add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_file', 50, 0 );

function wpcf7_add_tag_generator_file() {
	$tag_generator = WPCF7_TagGenerator::get_instance();
	$tag_generator->add( 'file', __( 'file', 'contact-form-7' ),
		'wpcf7_tag_generator_file' );
}

function wpcf7_tag_generator_file( $contact_form, $args = '' ) {
	$args = wp_parse_args( $args, array() );
	$type = 'file';

$description = __( "Generate a form-tag for a file uploading field. For more details, see %s.", 'contact-form-7' );

$desc_link = wpcf7_link( __( 'https://contactform7.com/file-uploading-and-attachment/', 'contact-form-7' ), __( 'File uploading and attachment', 'contact-form-7' ) );

?>
<div class="control-box">
<fieldset>
<legend><?php echo sprintf( esc_html( $description ), $desc_link ); ?></legend>

</tbody>
</table>
</fieldset>
</div>

<div class="insert-box">
	<input type="text" name="<?php echo $type; ?>" class="tag code" readonly="readonly" onfocus="this.select()" />

<p class="description mail-tag"><label for="<?php echo esc_attr( $args['content'] . '-mailtag' ); ?>"><?php echo sprintf( esc_html( __( "To attach the file uploaded through this field to mail, you need to insert the corresponding mail-tag (%s) into the File Attachments field on the Mail tab.", 'contact-form-7' ) ), '<strong><span class="mail-tag"></span></strong>' ); ?><input type="text" class="mail-tag code hidden" readonly="readonly" id="<?php echo esc_attr( $args['content'] . '-mailtag' ); ?>" /></label></p>
</div>
<?php
}