Why are sessions used?
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To run php script on a local machine we need to install Apache http server and php. Then only scripts are run in the browsers. but when these things are not loaded on a local machine and a php script is brought by the browser still the browser displays the page. how?
Is md5() is breakable if yes than how?
when we use ob_start() function in php then the header() and session_start() does not gives the error like header already sent,please explain in brief