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<?php print_r($_GET); if($_GET["a"] === "") echo "a is an empty string\n"; if($_GET["a"] === false) echo "a is false\n"; if($_GET["a"] === null) echo "a is null\n"; if(isset($_GET["a"])) echo "a is set\n"; if(!empty($_GET["a"])) echo "a is not empty"; ?>
Output for git.master, git.master_jit, rfc.property-hooks
Array ( ) Warning: Undefined array key "a" in /in/KlQgp on line 3 Warning: Undefined array key "a" in /in/KlQgp on line 4 Warning: Undefined array key "a" in /in/KlQgp on line 5 a is null

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