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<?php (function () { foreach ([42, true] as $v) { ${$v} = $v; } unset($v); var_dump(get_defined_vars()); var_dump(compact(42, true)); var_dump(compact((string)42, (string)true)); })();
Output for 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
array(2) { ["42"]=> int(42) ["1"]=> bool(true) } Warning: compact(): Argument #1 must be string or array of strings, int given in /in/WGVGr on line 9 Warning: compact(): Argument #2 must be string or array of strings, true given in /in/WGVGr on line 9 array(0) { } array(2) { ["42"]=> int(42) ["1"]=> bool(true) }
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 array(2) { ["42"]=> int(42) ["1"]=> bool(true) } Warning: compact(): Argument #1 must be string or array of strings, int given in /in/WGVGr on line 9 Warning: compact(): Argument #2 must be string or array of strings, true given in /in/WGVGr on line 9 array(0) { } array(2) { ["42"]=> int(42) ["1"]=> bool(true) }
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29
array(2) { ["42"]=> int(42) ["1"]=> bool(true) } Warning: compact(): Argument #1 must be string or array of strings, int given in /in/WGVGr on line 9 Warning: compact(): Argument #2 must be string or array of strings, bool given in /in/WGVGr on line 9 array(0) { } array(2) { ["42"]=> int(42) ["1"]=> bool(true) }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
array(2) { ["42"]=> int(42) ["1"]=> bool(true) } array(0) { } array(2) { ["42"]=> int(42) ["1"]=> bool(true) }

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