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PHP page controller uses if/exit to process "events/Operations/requests" sent by various front-end JS"

Source: Internet
Author: User
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In the PHP page controller, ifexit is used to handle various event operations sent by frontend JS. JS is the frontend, PHP is the backend, and backend PHP needs to obtain the frontend JS variables, the front-end JS can transmit data to the backend PHP through AJAX.
For example, login. php on the logon page: 
/Login. php display logon interface (default)/login. php? A = login processes logon events (form)

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Related Keywords:
php front controller php front end linux check if process running by pid front page php headers sent by php process form on same page php exit if loop

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