Hi,
I have plenty of experience working with PHP and I can create you the stripos you required, though I need more details about this.
Relevant Skills and Experience
PHP - 5+
JavaScript - 5+
MySQL - 5+
WordPress - 5+
Codeigniter - 5+
Laravel - 3+
Angular JS 2+
React JS - 2+
Backbone JS - 3+
Ember JS - 2+
NPM, Bower, Git - 3+
Proposed Milestones
$55 USD - Completion
Please provide more info about the stripos you require?