How to clear browser cache in php

php method to clear the browser cache: first open the corresponding code file; then add the code "header("Cache-Control: no-cache, must-revalidate" );" to clear the browser cache.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

How to clear the browser cache with php?

php clear browser cache

I encountered a small problem during the development process today. I modified the cover of a book in the background. After uploading the image, the browser cache caused the modification. , the original cover is still displayed in the background, and later two lines of code were added to solve the problem.

header("Last-Modified: " . gmdate( "D, d M Y H:i:s" ) . "GMT" );  
header("Cache-Control: no-cache, must-revalidate" );

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