What web developer must know for 2016/2017

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Fixed: Opencart installation error linux: warning: fopen(system/storage) failed to open stream: Permission denied

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Warning: fopen(/var/www/html/webocreation.com/system/storage/session/....): failed to open stream: Permission denied in /var/www/html/webocreation.com/system/library/session/file.php on line 29 Warning: flock() expects parameter 1 to be resource, bool given in /var/www/html/webocreation/system/library/session/file.php on line 31 Warning: fwrite() expects parameter 1 to be resource, bool given in /var/www/html/webocreation/system/library/session/file.php on line 33 Warning: fflush() expects parameter 1 to be resource, bool given in /var/www/html/webocreation/system/library/session/file.php on line 35 Warning: flock() expects parameter 1 to be resource, bool given in /var/www/html/webocreation/system/library/session/file.php on line 37 Warning: fclose() expects parameter 1 to be resource, bool given in /var/www/html/webocreation/system/library/session/file.php on line 39    These errors occurs because of the file permissions. In most of the forum, I found that they suggested to give full
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Opencart error: Notice: Trying to access array offset on value of type null in ..../vendor/scss.inc.php on line 1753

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If you see an error in opencart like below: Notice: Trying to access array offset on the value of type null in .../vendor/scss.inc.php on line 1753 then the solution is: Open the file  .../vendor/scss.inc.php and go to line as given in the above case it is 1753 where you will see code like below: foreach ($args as $arg) {     list($key, $value) = $arg;     $key = $key[1];     if (empty($key)) {         $posArgs[] = $value;     } else {         $keyArgs[$key] = $value;     } } Then change the line to the following, the changes done is in bold.  foreach ($args as $arg) {     list($key, $value) = $arg;     if (!empty($key[1])) {         $key = $key[1];     }     if (empty($key)) {         $posArgs[] = $value;     } else {         $keyArgs[$key] = $value;     } }    
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Cloudflare Settings for Marketing Websites

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Cloudflare is a widely-used content delivery network (CDN) and cybersecurity company that offers a suite of performance and security solutions for websites. This documentation provides guidelines and best practices for configuring Cloudflare settings specifically tailored to marketing websites. By leveraging Cloudflare's features effectively, marketing teams can enhance website performance, reliability, and security while optimizing user experience. Features and Configurations: Content Delivery Network (CDN) Configuration: Enable Cloudflare's CDN to accelerate website loading times by caching static content and serving it from Cloudflare's edge servers located worldwide. Configure caching settings to cache static assets such as images, CSS, and JavaScript files, ensuring faster page load times for visitors. SSL/TLS Encryption: Enable SSL/TLS encryption to secure data transmission between visitors and the website's server. Configure Cloudflare's SSL/TLS settings to e
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