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File Content: `file-upload-backend.php`

<?php
/**
 * File upload on the entry page
 *
 * @var int    $max_file_number Max file number.
 * @var string $preview_hint    Hint message on the preview.
 * @var string $modern_classes  Modern classes.
 * @var string $classic_classes Classic classes.
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

$hidden_class = $max_file_number < 2 ? 'wpforms-hide' : '';
?>
<div class="<?php echo wpforms_sanitize_classes( $modern_classes ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>">
	<svg viewBox="0 0 1024 1024" focusable="false" data-icon="inbox" width="50px" height="50px" fill="#B1B1B1" aria-hidden="true">
		<path d="M885.2 446.3l-.2-.8-112.2-285.1c-5-16.1-19.9-27.2-36.8-27.2H281.2c-17 0-32.1 11.3-36.9 27.6L139.4 443l-.3.7-.2.8c-1.3 4.9-1.7 9.9-1 14.8-.1 1.6-.2 3.2-.2 4.8V830a60.9 60.9 0 0 0 60.8 60.8h627.2c33.5 0 60.8-27.3 60.9-60.8V464.1c0-1.3 0-2.6-.1-3.7.4-4.9 0-9.6-1.3-14.1zm-295.8-43l-.3 15.7c-.8 44.9-31.8 75.1-77.1 75.1-22.1 0-41.1-7.1-54.8-20.6S436 441.2 435.6 419l-.3-15.7H229.5L309 210h399.2l81.7 193.3H589.4zm-375 76.8h157.3c24.3 57.1 76 90.8 140.4 90.8 33.7 0 65-9.4 90.3-27.2 22.2-15.6 39.5-37.4 50.7-63.6h156.5V814H214.4V480.1z"></path>
	</svg>
	<span class="modern-title">
		<?php echo esc_html( _n( 'Click or drag a file to this area to upload.', 'Click or drag files to this area to upload.', $max_file_number, 'wpforms-lite' ) ); ?>
	</span>
	<span class="modern-hint <?php echo sanitize_html_class( $hidden_class ); ?>">
		<?php echo esc_html( $preview_hint ); ?>
	</span>
</div>
<div class="<?php echo wpforms_sanitize_classes( $classic_classes ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>">
	<input type="file" class="primary-input" readonly>
</div>
File Content: file-upload-backend.php

File Content: `file-upload-backend.php`
