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<?php function makeLouder($fn) { return function($a) use($fn) { return $fn($a)."!!!"; }; } $foo = makeLouder(abs); echo "<p>".$foo(900)."<br/>".$foo(-900); $bar = makeLouder(strtoupper); echo "<p>".$bar("upper");
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Undefined constant "abs" in /in/6OA3Q:7 Stack trace: #0 {main} thrown in /in/6OA3Q on line 7
Process exited with code 255.
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 Fatal error: Uncaught Error: Undefined constant "abs" in /in/6OA3Q:7 Stack trace: #0 {main} thrown in /in/6OA3Q on line 7
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant abs - assumed 'abs' (this will throw an Error in a future version of PHP) in /in/6OA3Q on line 7 <p>900!!!<br/>900!!! Warning: Use of undefined constant strtoupper - assumed 'strtoupper' (this will throw an Error in a future version of PHP) in /in/6OA3Q on line 9 <p>UPPER!!!
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant abs - assumed 'abs' in /in/6OA3Q on line 7 <p>900!!!<br/>900!!! Notice: Use of undefined constant strtoupper - assumed 'strtoupper' in /in/6OA3Q on line 9 <p>UPPER!!!

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