In most cases you just want to check !$emptyVar . Use empty($emptyVar) if the variable might not have been set AND you don't wont to trigger an ... ... <看更多>

If you test an element of an array (like $_POST['key]), it test if the key doesn't exist or if it exist if its value is empty and never emit a warning. For who ... ... <看更多>

If you test an element of an array (like $_POST['key]), it test if the key doesn't exist or if it exist if its value is empty and never emit a warning. For who ... ... <看更多>

Signup using these links get 14 free days of Premium access to all Master Classes on programming and many more video series. ... <看更多>

Checking a value directly. $people = array( 'one' => 'Eric', // true 'two' => '', // false 'three ... ... <看更多>

If you want to check that array is empty or not at that time you can use if ( empty( $myArray ) ) beacuase it provide better performance for all ... ... <看更多>