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--TEST-- Test ucwords() function : usage variations - unexpected input values --FILE-- <?php /* Prototype : string ucwords ( string $str ) * Description: Uppercase the first character of each word in a string * Source code: ext/standard/string.c */ /* * Test ucwords() by passing different values including scalar and non scalar values */ echo "*** Testing ucwords() : usage variations ***\n"; // initialize all required variables // get an unset variable $unset_var = 'string_val'; unset($unset_var); $fp = fopen(__FILE__, "r"); class my { function __toString() { return "myString"; } } // array with different values $values = array ( // integer values 0, 1, 12345, -2345, // hex values 0x10, 0X20, 0xAA, -0XF5, // octal values 0123, -0342, // float values 10.5, -10.5, 10.1234567e10, 10.7654321E-10, .5, // array values array(), array(0), array(1), array(1, 2), array('color' => 'red', 'item' => 'pen'), // boolean values true, false, TRUE, FALSE, // objects new my(), // empty string "", '', //NULL NULL, null, // hex in string "0x123", '0x123', "0xFF12", "-0xFF12", // undefined variable @$undefined_var, // unset variable @$unset_var, // resource variable $fp ); // loop through each element of the array and check the working of ucwords() // when $str argument is supplied with different values echo "\n--- Testing ucwords() by supplying different values for 'str' argument ---\n"; $counter = 1; for($index = 0; $index < count($values); $index ++) { echo "-- Iteration $counter --\n"; $str = $values [$index]; var_dump( ucwords($str) ); $counter ++; } // close the file handle fclose($fp); echo "Done\n"; ?> --EXPECTF-- *** Testing ucwords() : usage variations *** --- Testing ucwords() by supplying different values for 'str' argument --- -- Iteration 1 -- string(1) "0" -- Iteration 2 -- string(1) "1" -- Iteration 3 -- string(5) "12345" -- Iteration 4 -- string(5) "-2345" -- Iteration 5 -- string(2) "16" -- Iteration 6 -- string(2) "32" -- Iteration 7 -- string(3) "170" -- Iteration 8 -- string(4) "-245" -- Iteration 9 -- string(2) "83" -- Iteration 10 -- string(4) "-226" -- Iteration 11 -- string(4) "10.5" -- Iteration 12 -- string(5) "-10.5" -- Iteration 13 -- string(12) "101234567000" -- Iteration 14 -- string(13) "1.07654321E-9" -- Iteration 15 -- string(3) "0.5" -- Iteration 16 -- Warning: ucwords() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 17 -- Warning: ucwords() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 18 -- Warning: ucwords() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 19 -- Warning: ucwords() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 20 -- Warning: ucwords() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 21 -- string(1) "1" -- Iteration 22 -- string(0) "" -- Iteration 23 -- string(1) "1" -- Iteration 24 -- string(0) "" -- Iteration 25 -- string(8) "MyString" -- Iteration 26 -- string(0) "" -- Iteration 27 -- string(0) "" -- Iteration 28 -- string(0) "" -- Iteration 29 -- string(0) "" -- Iteration 30 -- string(5) "0x123" -- Iteration 31 -- string(5) "0x123" -- Iteration 32 -- string(6) "0xFF12" -- Iteration 33 -- string(7) "-0xFF12" -- Iteration 34 -- string(0) "" -- Iteration 35 -- string(0) "" -- Iteration 36 -- Warning: ucwords() expects parameter 1 to be string, resource given in %s on line %d NULL Done