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--TEST--
Test array_slice() function : usage variations - different data types as keys in an array
--FILE--
<?php
/* Prototype : array array_slice(array $input, int $offset [, int $length [, bool $preserve_keys]])
* Description: Returns elements specified by offset and length
* Source code: ext/standard/array.c
*/
/*
* Pass different data types as keys in an array to array_slice()
* to test how $preserve_keys treats them
*/
echo "*** Testing array_slice() : usage variations ***\n";
// Initialise function arguments not being substituted
$offset = 0;
$length = 10; // to ensure all elements are displayed
//get an unset variable
$unset_var = 10;
unset ($unset_var);
// heredoc string
$heredoc = <<<EOT
hello world
EOT;
// arrays of different data types to be passed as $input
$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',
),
/*3*/ 'extreme floats' => array(
12.3456789000e6 => 'large',
12.3456789000E-10 => 'small',
),
// null data
/*4*/ 'null uppercase' => array(
NULL => 'null 1',
),
/*5*/ 'null lowercase' => array(
null => 'null 2',
),
// boolean data
/*6*/ 'bool lowercase' => array(
true => 'lowert',
false => 'lowerf',
),
/*7*/ 'bool uppercase' => array(
TRUE => 'uppert',
FALSE => 'upperf',
),
// empty data
/*8*/ 'empty double quotes' => array(
"" => 'emptyd',
),
/*9*/ 'empty single quotes' => array(
'' => 'emptys',
),
// string data
/*10*/ 'string' => array(
"stringd" => 'stringd',
'strings' => 'strings',
$heredoc => 'stringh',
),
// undefined data
/*11*/ 'undefined' => array(
@$undefined_var => 'undefined',
),
// unset data
/*12*/ 'unset' => array(
@$unset_var => 'unset',
),
);
// loop through each element of $inputs to check the behavior of array_slice()
$iterator = 1;
foreach($inputs as $type => $input) {
echo "\n-- Iteration $iterator : key type is $type --\n";
echo "\$preserve_keys = TRUE\n";
var_dump( array_slice($input, $offset, $length, true) );
echo "\$preserve_keys = FALSE\n";
var_dump( array_slice($input, $offset, $length, false) );
$iterator++;
};
echo "Done";
?>
--EXPECTF--
*** Testing array_slice() : usage variations ***
-- Iteration 1 : key type is int --
$preserve_keys = TRUE
array(4) {
[0]=>
string(4) "zero"
[1]=>
string(3) "one"
[12345]=>
string(8) "positive"
[-2345]=>
string(8) "negative"
}
$preserve_keys = FALSE
array(4) {
[0]=>
string(4) "zero"
[1]=>
string(3) "one"
[2]=>
string(8) "positive"
[3]=>
string(8) "negative"
}
-- Iteration 2 : key type is float --
$preserve_keys = TRUE
array(3) {
[10]=>
string(8) "positive"
[-10]=>
string(8) "negative"
[0]=>
string(4) "half"
}
$preserve_keys = FALSE
array(3) {
[0]=>
string(8) "positive"
[1]=>
string(8) "negative"
[2]=>
string(4) "half"
}
-- Iteration 3 : key type is extreme floats --
$preserve_keys = TRUE
array(2) {
[12345678]=>
string(5) "large"
[0]=>
string(5) "small"
}
$preserve_keys = FALSE
array(2) {
[0]=>
string(5) "large"
[1]=>
string(5) "small"
}
-- Iteration 4 : key type is null uppercase --
$preserve_keys = TRUE
array(1) {
[""]=>
string(6) "null 1"
}
$preserve_keys = FALSE
array(1) {
[""]=>
string(6) "null 1"
}
-- Iteration 5 : key type is null lowercase --
$preserve_keys = TRUE
array(1) {
[""]=>
string(6) "null 2"
}
$preserve_keys = FALSE
array(1) {
[""]=>
string(6) "null 2"
}
-- Iteration 6 : key type is bool lowercase --
$preserve_keys = TRUE
array(2) {
[1]=>
string(6) "lowert"
[0]=>
string(6) "lowerf"
}
$preserve_keys = FALSE
array(2) {
[0]=>
string(6) "lowert"
[1]=>
string(6) "lowerf"
}
-- Iteration 7 : key type is bool uppercase --
$preserve_keys = TRUE
array(2) {
[1]=>
string(6) "uppert"
[0]=>
string(6) "upperf"
}
$preserve_keys = FALSE
array(2) {
[0]=>
string(6) "uppert"
[1]=>
string(6) "upperf"
}
-- Iteration 8 : key type is empty double quotes --
$preserve_keys = TRUE
array(1) {
[""]=>
string(6) "emptyd"
}
$preserve_keys = FALSE
array(1) {
[""]=>
string(6) "emptyd"
}
-- Iteration 9 : key type is empty single quotes --
$preserve_keys = TRUE
array(1) {
[""]=>
string(6) "emptys"
}
$preserve_keys = FALSE
array(1) {
[""]=>
string(6) "emptys"
}
-- Iteration 10 : key type is string --
$preserve_keys = TRUE
array(3) {
["stringd"]=>
string(7) "stringd"
["strings"]=>
string(7) "strings"
["hello world"]=>
string(7) "stringh"
}
$preserve_keys = FALSE
array(3) {
["stringd"]=>
string(7) "stringd"
["strings"]=>
string(7) "strings"
["hello world"]=>
string(7) "stringh"
}
-- Iteration 11 : key type is undefined --
$preserve_keys = TRUE
array(1) {
[""]=>
string(9) "undefined"
}
$preserve_keys = FALSE
array(1) {
[""]=>
string(9) "undefined"
}
-- Iteration 12 : key type is unset --
$preserve_keys = TRUE
array(1) {
[""]=>
string(5) "unset"
}
$preserve_keys = FALSE
array(1) {
[""]=>
string(5) "unset"
}
Done