installed plugin W3 Total Cache version 2.3.2

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

@@ -0,0 +1,47 @@
+<?php
+namespace W3TC;
+
+class UserExperience_LazyLoad_Mutator_Unmutable {
+	private $placeholders = array();
+
+
+
+	public function __construct() {
+		$this->placeholder_base = 'w3tc_lazyload_' .
+			md5( isset( $_SERVER['REQUEST_TIME'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_TIME'] ) ) : '' ) . '_';
+	}
+
+
+
+	public function remove_unmutable( $buffer ) {
+		// scripts
+		$buffer = preg_replace_callback(
+			'~<script(\b[^>]*)>(.*?)</script>~is',
+			array( $this, 'placeholder' ), $buffer );
+
+		// styles
+		$buffer = preg_replace_callback(
+			'~\s*<style(\b[^>]*)>(.*?)</style>~is',
+			array($this, 'placeholder'), $buffer);
+
+		return $buffer;
+	}
+
+
+
+	public function restore_unmutable( $buffer ) {
+		return str_replace(
+			array_keys( $this->placeholders ),
+			array_values( $this->placeholders ),
+			$buffer
+		);
+	}
+
+
+
+	public function placeholder( $matches ) {
+		$key = '{' .$this->placeholder_base . count( $this->placeholders ) . '}';
+		$this->placeholders[$key] = $matches[0];
+		return $key;
+	}
+}