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<?php $arr = []; $arr[null] = 1; var_dump($arr); $arr = []; $arr[''] = 1; var_dump($arr);
Output for 8.5.0
Deprecated: Using null as an array offset is deprecated, use an empty string instead in /in/5TTAO on line 4 array(1) { [""]=> int(1) } array(1) { [""]=> int(1) }
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.15
array(1) { [""]=> int(1) } array(1) { [""]=> int(1) }
Output for 8.3.28
/bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28)
Process exited with code 1.

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