From 4b1866f65fd5a90fc7fe434d173c126e96097c2d Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Tue, 11 Dec 2018 23:18:40 +0000
Subject: [PATCH] Add check for required iconv extension

---
 amp.php | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/amp.php b/amp.php
index 97a932563dd..e9c4e551caf 100644
--- a/amp.php
+++ b/amp.php
@@ -38,7 +38,7 @@ function _amp_print_php_version_admin_notice() {
 function _amp_print_php_dom_document_notice() {
 	?>
 	<div class="notice notice-error">
-		<p><?php esc_html_e( 'The AMP plugin requires DOM extension in PHP. Please contact your host to install DOM extension.', 'amp' ); ?></p>
+		<p><?php esc_html_e( 'The AMP plugin requires DOM extension in PHP. Please contact your host to install this extension.', 'amp' ); ?></p>
 	</div>
 	<?php
 }
@@ -47,6 +47,23 @@ function _amp_print_php_dom_document_notice() {
 	return;
 }
 
+/**
+ * Print admin notice regarding DOM extension is not installed.
+ *
+ * @since 1.0.1
+ */
+function _amp_print_php_missing_iconv_notice() {
+	?>
+	<div class="notice notice-error">
+		<p><?php esc_html_e( 'The AMP plugin requires iconv extension in PHP. Please contact your host to install this extension.', 'amp' ); ?></p>
+	</div>
+	<?php
+}
+if ( ! function_exists( 'iconv' ) ) {
+	add_action( 'admin_notices', '_amp_print_php_missing_iconv_notice' );
+	return;
+}
+
 /**
  * Print admin notice when composer install has not been performed.
  *