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<?php $arr = ['foo' => 'bar']; $newArr = []; foreach (['foo', 'test'] as $key) { $arr[$key] ?? $newArr[] = $arr[$key]; } var_dump($newArr);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.4, 8.3.6 - 8.3.29, 8.4.1 - 8.4.14, 8.4.16, 8.5.0 - 8.5.1
Warning: Undefined array key "test" in /in/qmXCV on line 7 array(1) { [0]=> NULL }
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
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 Warning: Undefined array key "test" in /in/qmXCV on line 7 array(1) { [0]=> NULL }
Output for 7.3.0 - 7.3.31, 7.3.33, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined index: test in /in/qmXCV on line 7 array(1) { [0]=> NULL }
Output for 7.3.32, 7.4.26
array(1) { [0]=> NULL }

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