Title: PHP Notice Log – Undefined offset
Last modified: December 2, 2022

---

# PHP Notice Log – Undefined offset

 *  Resolved [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/)
 * Thank you for this great cache system. Recently I am getting huge amount of same
   PHP notice like following:
 * “PHP Notice: Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/
   wp-
    fastest-cache/inc/js-utilities.php on line 67”
 * Is it known error or special for me? Any fix recomendation will be appreciated.
 * Best regards!

Viewing 12 replies - 1 through 12 (of 12 total)

 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16255037)
 * I fixed the problem. if you download the following version, you can get the latest
   changes.
 * [https://downloads.wordpress.org/plugin/wp-fastest-cache.zip](https://downloads.wordpress.org/plugin/wp-fastest-cache.zip)
 *  Thread Starter [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16255708)
 * Latest version of pluguin is “6.1.1” right? I am already using latest version.
 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16256061)
 * I did not release a new version after solving the problem so I sent you the download
   link.
 *  Thread Starter [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16256091)
 * I have changed the files via link. Same line 67 error still continues :(, for
   your information.
 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16256188)
 * can you share the file which is /wp-fastest-cache/inc/js-utilities.php please?
 *  Thread Starter [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16256857)
 * Hello Mr. Emre, PHP notices are like these:
 *     ```
       [02-Dec-2022 18:52:54 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:53:25 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:55:56 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:57:01 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:57:32 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:57:45 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:58:12 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:58:20 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:58:25 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:58:52 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       [02-Dec-2022 18:59:14 UTC] PHP Notice:  Undefined offset: -1 in /home/avsaimin/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php on line 67
       ```
   
 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16256935)
 * probably you did not read my previous message. I want to see the js-utilities.
   php file
 *  Thread Starter [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16257119)
 * Sorry, sure that file is like that:
 *     ```
       <?php
       	class JsUtilities{
       		private $wpfc;
       		private $html = "";
       		private $jsLinks = array();
       		private $jsLinksExcept = "";
       		private $url = "";
       		private $minify;
   
       		public function __construct($wpfc, $html, $minify = false){
   
       			//$this->html = preg_replace("/\s+/", " ", ((string) $html));
       			$this->minify = $minify;
       			$this->wpfc = $wpfc;
       			$this->html = $html;
   
       			$this->setJsLinksExcept();
       			$this->setJsLinks();
       		}
   
       		public function check_exclude($js_url = false){
       			if($js_url){
       				foreach((array)$this->wpfc->exclude_rules as $key => $value){
   
       					if(isset($value->prefix) && $value->prefix && $value->type == "js"){
       						if($value->prefix == "contain"){
       							$preg_match_rule = preg_quote($value->content, "/");
       						}
   
       						if(preg_match("/".$preg_match_rule."/i", $js_url)){
       							return true;
       						}
       					}
       				}
       			}
       		}
   
       		public function combine_js(){
       			if(count($this->jsLinks) > 0){
       				$prev_content = "";
       				foreach($this->jsLinks as $key => $value){
       					$script_tag = substr($this->html, $value["start"], ($value["end"] - $value["start"] + 1));
   
       					if(!preg_match("/<script[^>]+json[^>]+>.+/", $script_tag) && !preg_match("/<script[^>]+text\/template[^>]+>.+/", $script_tag)){
       						if($href = $this->checkInternal($script_tag)){
       							if(strpos($this->jsLinksExcept, $href) === false){
       								if($key > 0 && $this->check_exclude($href)){
       									$this->mergeJs($prev_content, $this->jsLinks[$key - 1]);
       									$prev_content = "";
       									continue;
       								}
   
       								$minifiedJs = $this->minify($href);
   
       								if($minifiedJs){
       									if(!is_dir($minifiedJs["cachFilePath"])){
       										$this->wpfc->createFolder($minifiedJs["cachFilePath"], $minifiedJs["jsContent"], "js");
       									}
   
       									if($jsFiles = @scandir($minifiedJs["cachFilePath"], 1)){
   
       										$jsFiles[0] = preg_replace("/\.gz$/", "", $jsFiles[0]);
   
       										if($jsContent = $this->file_get_contents_curl($minifiedJs["url"]."/".$jsFiles[0]."?v=".time())){
   
       											if(preg_match("/^[\"\']use strict[\"\']/i", $jsContent)){
       												$this->mergeJs($prev_content, $this->jsLinks[$key - 1]);
       												$prev_content = "";
       											}else{
       												$prev_content = $jsContent."\n".$prev_content;
   
       												$script_tag = "<!-- ".$script_tag." -->";
   
       												if(($key + 1) == count($this->jsLinks)){
       													$this->mergeJs($prev_content, $value, true);
       													$prev_content = "";
       												}else{
       													$this->html = substr_replace($this->html, $script_tag, $value["start"], ($value["end"] - $value["start"] + 1));
       												}
       											}
       										}
       									}
       								}else{
       									if($key > 0 && $prev_content){
       										$this->mergeJs($prev_content, $this->jsLinks[$key - 1]);
       										$prev_content = "";
       									}
       								}
       							}else{
       								if($key > 0 && $prev_content){
       									$this->mergeJs($prev_content, $this->jsLinks[$key - 1]);
       									$prev_content = "";
       								}
       							}
       						}else{
       							if($key > 0 && $prev_content){
       								$this->mergeJs($prev_content, $this->jsLinks[$key - 1]);
       								$prev_content = "";
       							}
       						}
       					}else{
       						if($key > 0 && $prev_content){
       							$this->mergeJs($prev_content, $this->jsLinks[$key - 1]);
       							$prev_content = "";
       						}
       					}
       				}
       			}
   
       			return $this->html;
       		}
   
       		public function setJsLinks(){
       			$data = $this->html;
       			$script_list = array();
       			$script_start_index = false;
   
       			for($i = 0; $i < strlen( $data ); $i++) {
       				if(isset($data[$i-6])){
       				    if(substr($data, $i-6, 7) == "<script"){
       				    	$script_start_index = $i-6;
       					}
       				}
   
       				if(isset($data[$i-8])){
       					if($script_start_index){
       						if(substr($data, $i-8, 9) == "</script>"){
       							array_push($script_list, array("start" => $script_start_index, "end" => $i));
       							$script_start_index = false;
       						}
       					}
       				}
       			}
       			if(count($script_list) > 0){
       				$this->jsLinks = array_reverse($script_list);
       			}
   
       			// to update jsLinksExcept 
       			foreach($this->jsLinks as $key => $value){
       				$script_tag = substr($this->html, $value["start"], ($value["end"] - $value["start"] + 1));
   
       				if(preg_match("/wp-spamshield\/js\/jscripts\.php/i", $script_tag)){
       					$this->jsLinksExcept = $this->jsLinksExcept.$script_tag;
       				}
   
       				//amazonjs/components/js/jquery-tmpl/jquery.tmpl.min.js?ver=1.0.0pre
       				if(preg_match("/jquery-tmpl\/jquery\.tmpl\.min\.js/i", $script_tag)){
       					$this->jsLinksExcept = $this->jsLinksExcept.$script_tag;
       				}
       			}
       		}
   
       		public function setJsLinksExcept(){
       			$comment_tags = $this->find_tags("<!--", "-->");
       			$document_write = $this->find_tags("document.write(", ")");
   
       			foreach ($comment_tags as $key => $value) {
       				if(preg_match("/<script/i", $value["text"]) && preg_match("/<\/script/i", $value["text"])){
       					$this->jsLinksExcept = $value["text"].$this->jsLinksExcept;
       				}
       			}
   
       			foreach ($document_write as $key => $value) {
       				$this->jsLinksExcept = $value["text"].$this->jsLinksExcept;
       			}
       		}
   
       		public function minify($url){
       			$this->url = $url;
   
       			$md5 = $this->wpfc->create_name($url);
   
       			$cachFilePath = $this->wpfc->getWpContentDir("/cache/wpfc-minified")."/".$md5;
       			$jsLink = $this->convert_path_to_link($cachFilePath);
   
       			if(is_dir($cachFilePath)){
       				return array("cachFilePath" => $cachFilePath, "jsContent" => "", "url" => $jsLink);
       			}else{
       				if($js = $this->file_get_contents_curl($url)){
   
       					if($this->minify){
       						if(class_exists("WpFastestCachePowerfulHtml")){
       							$powerful_html = new WpFastestCachePowerfulHtml();
       							$js = $powerful_html->minify_js($js);
       						}else{
       							$js = "\n// source --> ".$url." \n".$js;
       						}
       					}else{
       						$js = "\n// source --> ".$url." \n".$js;
       					}
   
       					return array("cachFilePath" => $cachFilePath, "jsContent" => $js, "url" => $jsLink);
       				}
       			}
       			return false;
       		}
   
       		public function checkInternal($link){
       			$httpHost = str_replace("www.", "", $_SERVER["HTTP_HOST"]);
   
       			if(preg_match("/^<script[^\>]+\>/i", $link, $script)){
       				if(preg_match("/src=[\"\'](.*?)[\"\']/", $script[0], $src)){
       					if(preg_match("/alexa\.com\/site\_stats/i", $src[1])){
       						return false;
       					}
   
       					if(preg_match("/^\/[^\/]/", $src[1])){
       						return $src[1];
       					}
   
       					if(preg_match("/".preg_quote($httpHost, "/")."/i", $src[1])){
       						//<script src="https://server1.opentracker.net/?site=www.site.com"></script>
       						if(preg_match("/[\?\=].*".preg_quote($httpHost, "/")."/i", $src[1])){
       							return false;
       						}
   
       						return $src[1];
       					}
       				}
       			}
   
       			return false;
       		}
   
       		public function mergeJs($js_content, $value, $last = false){
       			$name = md5($js_content);
   
       			$name = base_convert(crc32($name), 20, 36);
   
       			$cachFilePath = $this->wpfc->getWpContentDir("/cache/wpfc-minified")."/".$name;
       			$jsLink = $this->convert_path_to_link($cachFilePath);
   
       			if(!is_dir($cachFilePath)){
       				$this->wpfc->createFolder($cachFilePath, $js_content, "js");
       			}
   
       			if(is_dir($cachFilePath)){
       				if($jsFiles = @scandir($cachFilePath, 1)){
   
       					$newLink = "<script src='".$jsLink."/".$jsFiles[0]."' type=\"text/javascript\"></script>";
   
       					$script_tag = substr($this->html, $value["start"], ($value["end"] - $value["start"] + 1));
   
       					if($last){
       						$script_tag = $newLink."\n<!-- ".$script_tag." -->\n";
       					}else{
       						$script_tag = $newLink."\n".$script_tag;
       					}
   
       					$this->html = substr_replace($this->html, $script_tag, $value["start"], ($value["end"] - $value["start"] + 1));
       				}
       			}
       		}
   
       		public function convert_path_to_link($path){
       			preg_match("/\/cache\/.+/", $path, $out);
       			$prefixLink = str_replace(array("http:", "https:"), "", WPFC_WP_CONTENT_URL);
   
       			return $prefixLink.$out[0];
       		}
   
       		public function file_get_contents_curl($url) {
       			if($data = $this->wpfc->read_file($url)){
       	    		return $data;
       	    	}
   
       			if(!preg_match("/\.php$/", $url)){
       				$url = $url."?v=".time();
       			}
   
       			if(preg_match("/^\/[^\/]/", $url)){
       				$url = home_url().$url;
       			}
   
       			$url = preg_replace("/^\/\//", "http://", $url);
   
       			$response = wp_remote_get($url, array('timeout' => 10 ) );
   
       			if ( !$response || is_wp_error( $response ) ) {
       				return false;
       			}else{
       				if(wp_remote_retrieve_response_code($response) == 200){
       					$data = wp_remote_retrieve_body( $response );
   
       					if(preg_match("/<\/\s*html\s*>\s*$/i", $data)){
       						return false;
       					}else{
       						return $data;	
       					}
       				}
       			}
       		}
   
       		public function find_tags($start_string, $end_string){
       			$data = $this->html;
   
       			$list = array();
       			$start_index = false;
       			$end_index = false;
   
       			for($i = 0; $i < strlen( $data ); $i++) {
       			    if(substr($data, $i, strlen($start_string)) == $start_string){
       			    	$start_index = $i;
       				}
   
       				if($start_index && $i > $start_index){
       					if(substr($data, $i, strlen($end_string)) == $end_string){
       						$end_index = $i + strlen($end_string)-1;
       						$text = substr($data, $start_index, ($end_index-$start_index + 1));
   
   
       						array_push($list, array("start" => $start_index, "end" => $end_index, "text" => $text));
   
       						$start_index = false;
       						$end_index = false;
       					}
       				}
       			}
   
       			return $list;
       		}
       	}
       ?>
       ```
   
 *  Thread Starter [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16257128)
 * 67th line is: $this->mergeJs($prev_content,
 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/#post-16257276)
 * you did not download the new link so you did not get the changes.
    please download
   the following file and replace with /wp-fastest-cache/inc/js-utilities.php file.
 * [https://plugins.trac.wordpress.org/browser/wp-fastest-cache/trunk/inc/js-utilities.php?rev=2827689&format=txt](https://plugins.trac.wordpress.org/browser/wp-fastest-cache/trunk/inc/js-utilities.php?rev=2827689&format=txt)
 *  Thread Starter [avsaimincekas](https://wordpress.org/support/users/avsaimincekas/)
 * (@avsaimincekas)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/page/2/#post-16257434)
 * It has worked! Thank you for your patience and amazing support! I am already 
   using premium fastest cache and gonna donate you for your efforts!
 * Best regards.
 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/page/2/#post-16257933)
 * you are welcome 🙂 if you vote, you make me so happy. 
    [https://wordpress.org/support/plugin/wp-fastest-cache/reviews/](https://wordpress.org/support/plugin/wp-fastest-cache/reviews/)

Viewing 12 replies - 1 through 12 (of 12 total)

The topic ‘PHP Notice Log – Undefined offset’ is closed to new replies.

 * ![](https://ps.w.org/wp-fastest-cache/assets/icon-256x256.png?rev=2064586)
 * [WP Fastest Cache - WordPress Cache Plugin](https://wordpress.org/plugins/wp-fastest-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-fastest-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-fastest-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-fastest-cache/active/)
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 * [Reviews](https://wordpress.org/support/plugin/wp-fastest-cache/reviews/)

 * 18 replies
 * 2 participants
 * Last reply from: [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * Last activity: [3 years, 6 months ago](https://wordpress.org/support/topic/php-notice-log-undefined-offset-2/page/2/#post-16257933)
 * Status: resolved