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<?php $var = "some value"; unset($var); $isnull = is_null($var); $isnull2 = ($var === null); $isset = isset($var); var_dump($var); var_dump($isnull); var_dump($isnull2); var_dump($isset);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Warning: Undefined variable $var in /in/lUcVV on line 7 Warning: Undefined variable $var in /in/lUcVV on line 8 Warning: Undefined variable $var in /in/lUcVV on line 10 NULL bool(true) bool(true) bool(false)
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 7.4.0 - 7.4.33
Notice: Undefined variable: var in /in/lUcVV on line 7 Notice: Undefined variable: var in /in/lUcVV on line 8 Notice: Undefined variable: var in /in/lUcVV on line 10 NULL bool(true) bool(true) bool(false)
preferences:
146.15 ms | 409 KiB | 5 Q