Checking Whether a Variable Is Set: isset( ) : isset « Data Type « PHP






  1. PHP
  2. Data Type
  3. isset

Checking Whether a Variable Is Set: isset( )

 
<?
    $foo = 1;
    if (isset($foo)) {
            echo "Foo is set\n";
    } else {
            echo "Foo is not set\n";
    }

    if (isset($bar)) {
            echo "Bar is set\n";
    } else {
            echo "Bar is not set\n";
    }
?>








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