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<?php $var = ['someKey' => 'someValue']; echo $var['someKey']; $wasSet = isset($var['aKey']); if ($wasSet) { echo "was set"; } else { echo "was not set"; } $possibleVar = $var['aKey']; if ($possibleVar) { echo "possible var: $possibleVar"; } else { echo "possible var is false: $possibleVar"; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
someValuewas not set Warning: Undefined array key "aKey" in /in/X73rZ on line 15 possible var is false:
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 someValuewas not set Warning: Undefined array key "aKey" in /in/X73rZ on line 15 possible var is false:
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
someValuewas not set Notice: Undefined index: aKey in /in/X73rZ on line 15 possible var is false:
Output for 7.3.32 - 7.3.33
someValuewas not setpossible var is false:
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189.46 ms | 401 KiB | 219 Q