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|
--TEST--
Test key() function : usage variations - Pass different data types as $array_arg arg.
--FILE--
<?php
/* Prototype : mixed key(array $array_arg)
* Description: Return the key of the element currently pointed to by the internal array pointer
* Source code: ext/standard/array.c
*/
/*
* Pass different data types as $array_arg argument to test behaviour of key()
*/
echo "*** Testing key() : usage variations ***\n";
//get an unset variable
$unset_var = 10;
unset ($unset_var);
// get a class
class classA
{
var $var1;
public function __toString() {
return "Class A object";
}
}
// heredoc string
$heredoc = <<<EOT
hello world
EOT;
// get a resource variable
$fp = fopen(__FILE__, "r");
// unexpected values to be passed to $array_arg argument
$inputs = array(
// int data
/*1*/ 0,
1,
12345,
-2345,
// float data
/*5*/ 10.5,
-10.5,
12.3456789000e10,
12.3456789000E-10,
.5,
// null data
/*10*/ NULL,
null,
// boolean data
/*12*/ true,
false,
TRUE,
FALSE,
// empty data
/*16*/ "",
'',
array(),
// string data
/*19*/ "string",
'string',
$heredoc,
// object data
/*22*/ new classA(),
// undefined data
/*23*/ @$undefined_var,
// unset data
/*24*/ @$unset_var,
// resource variable
/*25*/ $fp
);
// loop through each element of $inputs to check the behavior of key()
$iterator = 1;
foreach($inputs as $input) {
echo "\n-- Iteration $iterator --\n";
var_dump( key($input) );
$iterator++;
};
fclose($fp);
?>
===DONE===
--EXPECTF--
*** Testing key() : usage variations ***
-- Iteration 1 --
Warning: key() expects parameter 1 to be array, integer given in %s on line %d
NULL
-- Iteration 2 --
Warning: key() expects parameter 1 to be array, integer given in %s on line %d
NULL
-- Iteration 3 --
Warning: key() expects parameter 1 to be array, integer given in %s on line %d
NULL
-- Iteration 4 --
Warning: key() expects parameter 1 to be array, integer given in %s on line %d
NULL
-- Iteration 5 --
Warning: key() expects parameter 1 to be array, float given in %s on line %d
NULL
-- Iteration 6 --
Warning: key() expects parameter 1 to be array, float given in %s on line %d
NULL
-- Iteration 7 --
Warning: key() expects parameter 1 to be array, float given in %s on line %d
NULL
-- Iteration 8 --
Warning: key() expects parameter 1 to be array, float given in %s on line %d
NULL
-- Iteration 9 --
Warning: key() expects parameter 1 to be array, float given in %s on line %d
NULL
-- Iteration 10 --
Warning: key() expects parameter 1 to be array, null given in %s on line %d
NULL
-- Iteration 11 --
Warning: key() expects parameter 1 to be array, null given in %s on line %d
NULL
-- Iteration 12 --
Warning: key() expects parameter 1 to be array, boolean given in %s on line %d
NULL
-- Iteration 13 --
Warning: key() expects parameter 1 to be array, boolean given in %s on line %d
NULL
-- Iteration 14 --
Warning: key() expects parameter 1 to be array, boolean given in %s on line %d
NULL
-- Iteration 15 --
Warning: key() expects parameter 1 to be array, boolean given in %s on line %d
NULL
-- Iteration 16 --
Warning: key() expects parameter 1 to be array, string given in %s on line %d
NULL
-- Iteration 17 --
Warning: key() expects parameter 1 to be array, string given in %s on line %d
NULL
-- Iteration 18 --
NULL
-- Iteration 19 --
Warning: key() expects parameter 1 to be array, string given in %s on line %d
NULL
-- Iteration 20 --
Warning: key() expects parameter 1 to be array, string given in %s on line %d
NULL
-- Iteration 21 --
Warning: key() expects parameter 1 to be array, string given in %s on line %d
NULL
-- Iteration 22 --
string(4) "var1"
-- Iteration 23 --
Warning: key() expects parameter 1 to be array, null given in %s on line %d
NULL
-- Iteration 24 --
Warning: key() expects parameter 1 to be array, null given in %s on line %d
NULL
-- Iteration 25 --
Warning: key() expects parameter 1 to be array, resource given in %s on line %d
NULL
===DONE===
|
