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|
--TEST--
Test usort() function : usage variations - Pass different data types as $cmp_function arg
--FILE--
<?php
/* Prototype : bool usort(array $array_arg, string $cmp_function)
* Description: Sort an array by values using a user-defined comparison function
* Source code: ext/standard/array.c
*/
/*
* Pass different data types as $cmp_function argument to usort() to test behaviour
*/
echo "*** Testing usort() : usage variation ***\n";
// Class definition for object variable
class MyClass
{
public function __toString()
{
return 'object';
}
}
$array_arg = array(0 => 1, 1 => -1, 2 => 3, 3 => 10, 4 => 4, 5 => 2, 6 => 8, 7 => 5);
// Get an unset variable
$unset_var = 10;
unset ($unset_var);
// Get resource variable
$fp = fopen(__FILE__,'r');
// different values for $cmp_function
$inputs = array(
// int data
/*1*/ 0,
1,
12345,
-2345,
// float data
/*5*/ 10.5,
-10.5,
10.1234567e8,
10.7654321E-8,
.5,
// array data
/*10*/ array(),
array(0),
array(1),
array(1, 2),
array('color' => 'red', 'item' => 'pen'),
// null data
/*15*/ NULL,
null,
// boolean data
/*17*/ true,
false,
TRUE,
FALSE,
// empty data
/*21*/ "",
'',
// string data
"string",
'string',
// object data
/*25*/ new MyClass(),
// resource data
$fp,
// undefined data
@$undefined_var,
// unset data
/*28*/ @$unset_var,
);
// loop through each element of $inputs to check the behavior of usort()
$iterator = 1;
foreach($inputs as $input) {
echo "\n-- Iteration $iterator --\n";
var_dump( usort($array_arg, $input) );
$iterator++;
};
//closing resource
fclose($fp);
?>
===DONE===
--EXPECTF--
*** Testing usort() : usage variation ***
-- Iteration 1 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 2 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 3 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 4 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 5 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 6 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 7 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 8 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 9 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 10 --
Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d
NULL
-- Iteration 11 --
Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d
NULL
-- Iteration 12 --
Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d
NULL
-- Iteration 13 --
Warning: usort() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d
NULL
-- Iteration 14 --
Warning: usort() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d
NULL
-- Iteration 15 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 16 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 17 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 18 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 19 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 20 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 21 --
Warning: usort() expects parameter 2 to be a valid callback, function '' not found or invalid function name in %s on line %d
NULL
-- Iteration 22 --
Warning: usort() expects parameter 2 to be a valid callback, function '' not found or invalid function name in %s on line %d
NULL
-- Iteration 23 --
Warning: usort() expects parameter 2 to be a valid callback, function 'string' not found or invalid function name in %s on line %d
NULL
-- Iteration 24 --
Warning: usort() expects parameter 2 to be a valid callback, function 'string' not found or invalid function name in %s on line %d
NULL
-- Iteration 25 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 26 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 27 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
-- Iteration 28 --
Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
NULL
===DONE===
|
