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<?php $nullvar = array(0 => 'a', 'a' => array('b')); $nullvar[0]['a'] = null; if (isset($nullvar[0]['a'])) { echo "set"; } else { echo "not set"; } if (is_null($nullvar[0]['a'])) { echo "\nnull"; } else { echo "\nnot null"; }
Output for 8.0.7 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/ABa0g:4 Stack trace: #0 {main} thrown in /in/ABa0g on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.6
Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/ABa0g:4 Stack trace: #0 {main} Next Error: Cannot assign an empty string to a string offset in /in/ABa0g:4 Stack trace: #0 {main} thrown in /in/ABa0g on line 4
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Illegal string offset 'a' in /in/ABa0g on line 4 Warning: Cannot assign an empty string to a string offset in /in/ABa0g on line 4 not set Warning: Illegal string offset 'a' in /in/ABa0g on line 11 not null
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.21, 7.0.0 - 7.0.20
Warning: Illegal string offset 'a' in /in/ABa0g on line 4 not set Warning: Illegal string offset 'a' in /in/ABa0g on line 11 not null
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.3 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
set not null
Output for 5.0.0 - 5.0.2
not set not null

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