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<?php [$key => $value] = ['b'=> 2]; var_dump($key); var_dump($value);
Output for 8.5.0
Warning: Undefined variable $key in /in/5ubJU on line 5 Deprecated: Using null as an array offset is deprecated, use an empty string instead in /in/5ubJU on line 5 Warning: Undefined array key "" in /in/5ubJU on line 5 Warning: Undefined variable $key in /in/5ubJU on line 7 NULL 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 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14
Warning: Undefined variable $key in /in/5ubJU on line 5 Warning: Undefined array key "" in /in/5ubJU on line 5 Warning: Undefined variable $key in /in/5ubJU on line 7 NULL NULL

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