PMPro - Set Maximum Character Count Checkout Field

pmpro-max-char-checkout-field.php

<?php
/**
 * Forces maxinput on input fields on the checkout page.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_checkout_page_min_number() {

	// Ensure we're on the checkout page.
	if ( ! is_page( get_option( 'pmpro_checkout_page_id' ) ) ) {
		return;
	}

	// Output jQuery to output the new table column and data.
	if ( wp_script_is( 'jquery', 'done' ) ) {
		?>
		<script>
			// Need to change the var to the input you'd like to target via jQuery.
			var $input = jQuery( 'input[type=text]' );

			// Change the length needed.
			$input.prop('maxlength','10');
		</script>
		<?php
	}
	?>

	<?php
}
add_action( 'wp_footer', 'my_pmpro_checkout_page_min_number' );