Add Percent off Discount Codes

discount-codes/add-discount-code-by-percent-option.php

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+<?php
+/**
+ * This recipe will add a the option to add percentage discount to your discount code. This is visible on the
+ * Discount Codes page for admin reference.
+ *
+ * title: Add Percentage option to discount codes
+ * layout: snippet
+ * collection: discount-codes
+ * category: custom-fields, description, percent
+ * 
+ * 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 pmpropd_pmpro_discount_code_after_level_settings( $code_id, $level ) {
+	$percents = pmpro_getDCPDs( $code_id );
+	if ( ! empty( $percents [ $level->id ] ) ) {
+		$percent = $percents [ $level->id ];
+	} else {
+		$percent = '';
+	}
+	?>
+	<table>
+		<tbody class="form-table">
+		<tr>
+			<td>
+		<tr>
+			<th scope="row" valign="top"><label for="percent_discount"> Percent Discount:</label></th>
+			<td><input name="percent_discount[]" type="text" size="20" value="<?php echo esc_attr( $percent); ?>" />% <small> Percentage Discount. This will override the other level settings.  </small></td>
+		</tr>
+		</td>
+		</tr>
+		</tbody>
+	</table>
+
+
+	<?php
+}
+add_action( 'pmpro_discount_code_after_level_settings', 'pmpropd_pmpro_discount_code_after_level_settings', 10, 2 );
+
+
+function pmpropd_pmpro_save_discount_code_level( $code_id, $level_id ) {
+	$all_levels_a         = $_REQUEST['all_levels'];                   
+	$percent_discount_a = $_REQUEST['percent_discount'];  
+
+	if ( ! empty( $all_levels_a ) ) {
+		$key                 = array_search( $level_id, $all_levels_a );  
+		$percents = pmpro_getDCPDs( $code_id );                
+		$percents [ $level_id ] = $percent_discount_a[ $key ]; 
+		pmpro_saveDCPDs( $code_id, $percents); 
+	}
+}
+add_action( 'pmpro_save_discount_code_level', 'pmpropd_pmpro_save_discount_code_level', 10, 2 );
+
+
+function pmpro_saveDCPDs( $code_id, $percents ) {
+	$all_percents             = get_option( 'pmpro_discount_code_percent_discounts', array() );
+	$all_percents[ $code_id ] = $percents;
+	update_option( 'pmpro_discount_code_percent_discounts', $all_percents );
+}
+
+
+function pmpro_getDCPDs( $code_id ) {
+	$all_percents = get_option( 'pmpro_discount_code_percent_discounts', array() );
+	if ( ! empty( $all_percents ) && ! empty( $all_percents[ $code_id ] ) ) {
+		return $all_percents[ $code_id ];
+	} else {
+		return false;
+	}
+}
+
+function pmpropd_pmpro_discount_code_level($level, $code_id) {
+
+	$percent = pmpro_getDCPDs($code_id);
+
+	if(isset($percent) && isset($percent[$level->id])) {
+		$original_level = pmpro_getLevel($level);
+		$percent_off = $percent[$level->id];
+		$level = $original_level;
+		$level->initial_payment = (1 - 0.01*$percent_off)*$level->initial_payment;
+		$level->billing_amount = (1 - 0.01*$percent_off)*$level->billing_amount;
+	}
+
+	return $level;
+}
+add_filter("pmpro_discount_code_level", "pmpropd_pmpro_discount_code_level", 10, 2);