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--TEST-- Test array_push() function : usage variations - array keys are different data types --FILE-- <?php /* Prototype : int array_push(array $stack, mixed $var [, mixed $...]) * Description: Pushes elements onto the end of the array * Source code: ext/standard/array.c */ /* * Pass array_push arrays where the keys are different data types. */ echo "*** Testing array_push() : usage variations ***\n"; // Initialise function arguments not being substituted $var = 'value'; //get an unset variable $unset_var = 10; unset ($unset_var); // heredoc string $heredoc = <<<EOT hello world EOT; // arrays of different data types as keys to be passed to $stack argument $inputs = array( // int data /*1*/ 'int' => array( 0 => 'zero', 1 => 'one', 12345 => 'positive', -2345 => 'negative', ), // float data /*2*/ 'float' => array( 10.5 => 'positive', -10.5 => 'negative', .5 => 'half', ), 'extreme floats' => array( 12.3456789000e10 => 'large', 12.3456789000E-10 => 'small', ), // null data /*3*/ 'null uppercase' => array( NULL => 'null 1', ), 'null lowercase' => array( null => 'null 2', ), // boolean data /*4*/ 'bool lowercase' => array( true => 'lowert', false => 'lowerf', ), 'bool uppercase' => array( TRUE => 'uppert', FALSE => 'upperf', ), // empty data /*5*/ 'empty double quotes' => array( "" => 'emptyd', ), 'empty single quotes' => array( '' => 'emptys', ), // string data /*6*/ 'string' => array( "stringd" => 'stringd', 'strings' => 'strings', $heredoc => 'stringh', ), // undefined data /*8*/ 'undefined' => array( @$undefined_var => 'undefined', ), // unset data /*9*/ 'unset' => array( @$unset_var => 'unset', ), ); // loop through each sub-array of $inputs to check the behavior of array_push() $iterator = 1; foreach($inputs as $key => $input) { echo "\n-- Iteration $iterator : $key data --\n"; echo "Before : "; var_dump(count($input)); echo "After : "; var_dump( array_push($input, $var) ); $iterator++; }; echo "Done"; ?> --EXPECTF-- *** Testing array_push() : usage variations *** -- Iteration 1 : int data -- Before : int(4) After : int(5) -- Iteration 2 : float data -- Before : int(3) After : int(4) -- Iteration 3 : extreme floats data -- Before : int(2) After : int(3) -- Iteration 4 : null uppercase data -- Before : int(1) After : int(2) -- Iteration 5 : null lowercase data -- Before : int(1) After : int(2) -- Iteration 6 : bool lowercase data -- Before : int(2) After : int(3) -- Iteration 7 : bool uppercase data -- Before : int(2) After : int(3) -- Iteration 8 : empty double quotes data -- Before : int(1) After : int(2) -- Iteration 9 : empty single quotes data -- Before : int(1) After : int(2) -- Iteration 10 : string data -- Before : int(3) After : int(4) -- Iteration 11 : undefined data -- Before : int(1) After : int(2) -- Iteration 12 : unset data -- Before : int(1) After : int(2) Done