--TEST-- Test pow() function : usage variations - different data types as $base argument --INI-- precision = 14 --SKIPIF-- <?php if (PHP_INT_SIZE != 4) die("skip this test is for 32bit platform only"); ?> --FILE-- <?php /* Prototype : number pow ( number $base , number $exp ) * Description: Exponential expression. * Source code: ext/standard/math.c */ echo "*** Testing pow() : usage variations ***\n"; //get an unset variable $unset_var = 10; unset ($unset_var); // heredoc string $heredoc = <<<EOT abc xyz EOT; // get a class class classA { } // get a resource variable $fp = fopen(__FILE__, "r"); $inputs = array( // int data /*1*/ 0, 1, 12345, -2345, PHP_INT_MAX, // float data /*6*/ 10.5, -10.5, 12.3456789000e10, 12.3456789000E-10, .5, // null data /*11*/ NULL, null, // boolean data /*13*/ true, false, TRUE, FALSE, // empty data /*17*/ "", '', array(), // string data /*20*/ "abcxyz", 'abcxyz', $heredoc, // object data /*23*/ new classA(), // undefined data /*24*/ @$undefined_var, // unset data /*25*/ @$unset_var, // resource variable /*26*/ $fp ); // loop through each element of $inputs to check the behaviour of pow() $iterator = 1; foreach($inputs as $input) { echo "\n-- Iteration $iterator --\n"; var_dump(pow($input, 3)); $iterator++; }; fclose($fp); ?> ===Done=== --EXPECTF-- *** Testing pow() : usage variations *** -- Iteration 1 -- int(0) -- Iteration 2 -- int(1) -- Iteration 3 -- float(1881365963625) -- Iteration 4 -- float(-12895213625) -- Iteration 5 -- float(9.903520300448E+27) -- Iteration 6 -- float(1157.625) -- Iteration 7 -- float(-1157.625) -- Iteration 8 -- float(1.881676371789%dE+33) -- Iteration 9 -- float(1.881676371789%dE-27) -- Iteration 10 -- float(0.125) -- Iteration 11 -- int(0) -- Iteration 12 -- int(0) -- Iteration 13 -- int(1) -- Iteration 14 -- int(0) -- Iteration 15 -- int(1) -- Iteration 16 -- int(0) -- Iteration 17 -- int(0) -- Iteration 18 -- int(0) -- Iteration 19 -- int(0) -- Iteration 20 -- int(0) -- Iteration 21 -- int(0) -- Iteration 22 -- int(0) -- Iteration 23 -- Notice: Object of class classA could not be converted to int in %s on line %d int(1) -- Iteration 24 -- int(0) -- Iteration 25 -- int(0) -- Iteration 26 -- %s ===Done===