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<?php $a = $_POST['a'] = '6'; $b= $_POST['b'] = '2'; echo $a."\n"; echo $b."\n"; echo (!is_numeric(($a * $b) . '')) ? "yes right way \n":"not number...\n"; echo (($a * $b) != INF) ? "YES infinite.. \n":"NOt inf ... \n"; if(!is_numeric (($a * $b) . '') && (($a * $b) != INF)) { echo "good\n"; }else{echo "WRONG...\n";}
Output for 4.3.6 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
6 2 not number... YES infinite.. WRONG...
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 6 2 not number... YES infinite.. WRONG...
Output for 4.3.0 - 4.3.5
6 2 not number... Notice: Use of undefined constant INF - assumed 'INF' in /in/Q6vaO on line 9 YES infinite.. WRONG...

preferences:
249.14 ms | 401 KiB | 343 Q