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<?php $tests = [ '[] == false' => [] == false, '[0] == true' => [0] == true, '"" == false' => '' == false, '"ABC" == false' => 'ABC' == false, '"0" == false' => '0' == false, '"1" == true' => '1' == true, '"123" == false' => '123' == true, 'null == false' => null == false, '0 == false' => 0 == false, '0.49 == false' => 0.49 == false, '$xyz == false' => $xyz == false ]; $i = 0; foreach($tests as $name => $val) { echo ++$i . ') ' . $name . ' => ' . ($val ? 'T' : 'F') . "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $xyz in /in/IgaXE on line 4 1) [] == false => T 2) [0] == true => T 3) "" == false => T 4) "ABC" == false => F 5) "0" == false => T 6) "1" == true => T 7) "123" == false => T 8) null == false => T 9) 0 == false => T 10) 0.49 == false => F 11) $xyz == false => T

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