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<?php function true_or_false($bool) { return $bool ? 'true' : 'false'; } function do_test($expression) { echo "\t$expression : " . true_or_false(eval("return $expression;")) . "\n"; } function test($str) { echo "Testing $str\n"; do_test("$str == 0"); do_test("$str === 0"); } test('""'); test('null'); test('array()');
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
Testing "" "" == 0 : false "" === 0 : false Testing null null == 0 : true null === 0 : false Testing array() array() == 0 : false array() === 0 : false
Output for 4.3.0 - 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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Testing "" "" == 0 : true "" === 0 : false Testing null null == 0 : true null === 0 : false Testing array() array() == 0 : false array() === 0 : false
preferences:
270.08 ms | 405 KiB | 460 Q