'Falsevar' web sites
Php isset. manual
us3.php.net 2013-03-17
falsevar dump isset a, b ; FALSE foo NULL;var dump isset foo ; FALSE. This also work for elements in arrays.php a array test 1, hello NULL, pie array a apple ;var dump isset a test ; TRUEvar dump isset a foo ; falsevar dump isset a hello ; FALSE The key hello equals NULL so is considered unset If you want to check for NULL key values then try var dump array key exists hello , a ; TRUE Checking deeper array valuesvar dump isset a
us3.php.net 2013-03-17
falsevar dump isset a, b ; FALSE foo NULL;var dump isset foo ; FALSE. This also work for elements in arrays.php a array test 1, hello NULL, pie array a apple ;var dump isset a test ; TRUEvar dump isset a foo ; falsevar dump isset a hello ; FALSE The key hello equals NULL so is considered unset If you want to check for NULL key values then try var dump array key exists hello , a ; TRUE Checking deeper array valuesvar dump isset a
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