My little web application works on PHP version 5.3.8 but not on new versions of PHP 7.x etc.

Could you provide directly your error log??? all warnings and serveral error should be displayed there. you could replace functions and function's formats to PHP 7.... let me know

Hi, I am Saeed a web developer working since 2013.I have read your project description and find it related to my skills and experience. Therefore, I am interested to work on it. My skills and experience are as below. 1) Expert Level a) Core PHP b) CodeIgniter c) Big Commerce d) Payment Integration e) API’s both for Aps and from third party. f) Ajax g) jQuery h) JavaScript i) HTML, CSS j) Bootstraps k) MySQL l) cPanel Management m) Domain configuration & web hosting n) SSL etc 2) Intermediate/Under Working a) Laravel b) WordPress c) Magento d) Shopify e) SEO and website ranking 3) Basic level a) Content writing. b) Social media and marketing. I have worked on below website and application as an individual developer and as a part of team. Kindly contact to discuss more on your project. Regards Saeed