installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/Cdnfsd_StackPath_Popup_View_Intro.php

@@ -0,0 +1,39 @@
+<?php
+namespace W3TC;
+
+if ( ! defined( 'W3TC' ) ) {
+	die();
+}
+?>
+<form class="w3tc_popup_form">
+	<?php
+	if ( isset( $details['error_message'] ) ) {
+		echo '<div class="error">' . esc_html( $details['error_message'] ) . '</div>';
+	}
+	?>
+	<div class="metabox-holder">
+		<?php Util_Ui::postbox_header( esc_html__( 'Your StackPath Account credentials', 'w3-total-cache' ) ); ?>
+		<table class="form-table">
+			<tr>
+				<td>API Key:</td>
+				<td>
+					<input name="api_key" type="text" class="w3tc-ignore-change"
+						style="width: 550px"
+						value="<?php echo esc_attr( $details['api_key'] ); ?>" />
+					<p class="description">
+						To obtain API key you can
+						<a target="_blank" href="<?php echo esc_url( $url_obtain_key ); ?>">click here</a>,
+						log in, and paste the key in above field.
+					</p>
+				</td>
+			</tr>
+		</table>
+
+		<p class="submit">
+			<input type="button"
+				class="w3tc_cdn_stackpath_fsd_list_zones w3tc-button-save button-primary"
+				value="<?php esc_attr_e( 'Next', 'w3-total-cache' ); ?>" />
+		</p>
+		<?php Util_Ui::postbox_footer(); ?>
+	</div>
+</form>