Function of ob_start ()

Enabling the output cache of ob_start () is a very important function in PHP. To implement the cache, generating static pages is inseparable from the dynamic and static conversion of ob_start...

Generally, ob _ **** is mostly used to write static html files,
And control the output.

Ob_xxxx is the PHP output control function group.

By default, PHP directly outputs content to the standard output. That is to say, PHPProgramOutput data while running. When the content is large, the output device cannot be obtained or the device is suspended due to network problems. When the output cache is enabled, the PHP output is redirected to the memory. After the program ends, it is output to the client.

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Ob_get_contents (), ob_end_flush (), or flush ()
Can be displayed only when