PHP example: bool is_infinite(float)

$x = 0; if(is_infinite($x)) { echo "The value of \$x ($x) is PHP infinite.\n"; // Never executed } else { echo "The value of \$x ($x) is not PHP infinite.\n"; } $x = log(0); // evaluates to -INF if(is_infinite($x)) { echo "The value of \$x ($x) is PHP infinite.\n"; } else { echo "The value of \$x ($x) is not PHP infinite.\n"; // Never executed }