Loop $ _ SERVER, a lot of variables are undefined. Solution

Loop $ _ SERVER, a lot of variables are undefined. Foreach ($ _ SERVERas $ I) {echo $ _ SERVER [$ I]. '& lt; br/& gt;';} added error_reporting (E_ALL & amp ;~ E_NOTICE); it does not explicitly loop out $ _ SERVER, a lot of variables are undefined.

Foreach ($ _ SERVER as $ I ){
Echo $ _ SERVER [$ I].'
';
}

Add error_reporting (E_ALL &~ E_NOTICE );
It does not display anything.

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PHP code

Foreach ($ _ SERVER as $ I) {echo $ I .'
';}
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Or


  
  

   
   
PHP code

   
   
Foreach ($ _ SERVER as $ k => I I) {echo $ _ SERVER [$ k].'
';}