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--TEST-- Test base_convert() function : usage variations - different data types as $number argument --FILE-- <?php /* Prototype : string base_convert ( string $number , int $frombase , int $tobase ) * Description: Convert a number between arbitrary bases. * Source code: ext/standard/math.c */ echo "*** Testing base_convert() : usage variations ***\n"; //get an unset variable $unset_var = 10; unset ($unset_var); // heredoc string $heredoc = <<<EOT abc xyz EOT; // get a resource variable $fp = fopen(__FILE__, "r"); $inputs = array( // int data /*1*/ 0, 1, 12, -12, 2147483647, // float data /*6*/ 10.5, -10.5, 1.234567e2, 1.234567E-2, .5, // null data /*11*/ NULL, null, // boolean data /*13*/ true, false, TRUE, FALSE, // empty data /*17*/ "", '', array(), // string data /*20*/ "abcxyz", 'abcxyz', $heredoc, // undefined data /*23*/ @$undefined_var, // unset data /*24*/ @$unset_var, // resource variable /*25*/ $fp ); // loop through each element of $inputs to check the behaviour of base_convert() $iterator = 1; foreach($inputs as $input) { echo "\n-- Iteration $iterator --\n"; var_dump(base_convert($input, 10, 8)); $iterator++; }; fclose($fp); ?> ===Done=== --EXPECTF-- *** Testing base_convert() : usage variations *** -- Iteration 1 -- string(1) "0" -- Iteration 2 -- string(1) "1" -- Iteration 3 -- string(2) "14" -- Iteration 4 -- string(2) "14" -- Iteration 5 -- string(11) "17777777777" -- Iteration 6 -- string(3) "151" -- Iteration 7 -- string(3) "151" -- Iteration 8 -- string(7) "4553207" -- Iteration 9 -- string(7) "4553207" -- Iteration 10 -- string(1) "5" -- Iteration 11 -- string(1) "0" -- Iteration 12 -- string(1) "0" -- Iteration 13 -- string(1) "1" -- Iteration 14 -- string(1) "0" -- Iteration 15 -- string(1) "1" -- Iteration 16 -- string(1) "0" -- Iteration 17 -- string(1) "0" -- Iteration 18 -- string(1) "0" -- Iteration 19 -- Notice: Array to string conversion in %s on line %d string(1) "0" -- Iteration 20 -- string(1) "0" -- Iteration 21 -- string(1) "0" -- Iteration 22 -- string(1) "0" -- Iteration 23 -- string(1) "0" -- Iteration 24 -- string(1) "0" -- Iteration 25 -- string(%d) "%d" ===Done===