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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 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
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
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Array ( ) Notice: Undefined index: a in /in/KlQgp on line 3 Notice: Undefined index: a in /in/KlQgp on line 4 Notice: Undefined index: a in /in/KlQgp on line 5 a is null
Output for 7.3.32 - 7.3.33
Array ( ) a is null
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Array ( ) Notice: Undefined index: a in /in/KlQgp on line 3 Notice: Undefined index: a in /in/KlQgp on line 4 Notice: Undefined index: a in /in/KlQgp on line 5 a is null
Output for 4.3.0 - 4.3.1
Array ( [/in/KlQgp] => ) Notice: Undefined index: a in /in/KlQgp on line 3 Notice: Undefined index: a in /in/KlQgp on line 4 Notice: Undefined index: a in /in/KlQgp on line 5 a is null
preferences:
265.38 ms | 402 KiB | 349 Q