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<?php $foo = [10, 20, 30]; var_dump($foo[]++); var_dump(++$foo[]); var_dump(++$foo[]); var_dump($foo); var_dump(--$foo[]); var_dump($foo);
Output for 8.3.0 - 8.3.27, 8.4.1 - 8.4.14, 8.5.0
NULL int(1) int(1) array(6) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(1) [4]=> int(1) [5]=> int(1) } Warning: Decrement on type null has no effect, this will change in the next major version of PHP in /in/iWYfl on line 8 NULL array(7) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(1) [4]=> int(1) [5]=> int(1) [6]=> 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 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29
NULL int(1) int(1) array(6) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(1) [4]=> int(1) [5]=> int(1) } NULL array(7) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(1) [4]=> int(1) [5]=> int(1) [6]=> NULL }

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