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<?php error_reporting(0); $expr = 1.0/0.0; if (is_finite( $expr ) == 0 ) { echo 'finite'; } else if (is_infinite( $expr )){ echo INF; } else { echo !(is_infinite($expr))? INF : 'not infinite'; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6

Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
finite
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
INF
preferences:
195.85 ms | 402 KiB | 228 Q