Question

How to use infinity in PHP

Answer 1

echo 1000 < INF ? 'yes' : 'no'; // yes
echo "<br />";
echo -1 < INF ? 'yes' : 'no';   // yes
echo "<br />";      
echo INF < INF ? 'yes' : 'no';  // no
echo "<br />";
echo INF == INF ? 'yes' : 'no'; // yes     
echo "<br />";
echo INF <= INF ? 'yes' : 'no'; // yes     

 
/*
run:
  
yes
yes
no
yes
yes 
  
*/

 

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Answer 2

echo INF . "<br />";
echo INF + 100 . "<br />";
echo INF * -1 . "<br />";
echo 1 / INF . "<br />";
echo log(0) . "<br />";
 
/*
run:
  
INF
INF
-INF
0
-INF
  
*/

 

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