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--TEST--
Test count_chars() function : usage variations - test values for $string argument
--FILE--
<?php
/* Prototype : mixed count_chars ( string $string [, int $mode ] )
* Description: Return information about characters used in a string
* Source code: ext/standard/string.c
*/
echo "*** Testing count_chars() function: with unexpected inputs for 'string' argument ***\n";
//get an unset variable
$unset_var = 'string_val';
unset($unset_var);
//defining a class
class sample {
public function __toString() {
return "sample object";
}
}
//getting the resource
$file_handle = fopen(__FILE__, "r");
// array with different values for $input
$inputs = array (
// integer values
/* 1 */ 0,
1,
255,
256,
2147483647,
-2147483648,
// float values
/* 7 */ 10.5,
-20.5,
10.1234567e10,
// array values
/* 10 */ array(),
array(0),
array(1, 2),
// boolean values
/* 13 */ true,
false,
TRUE,
FALSE,
// null values
/* 17 */ NULL,
null,
// objects
/* 19 */ new sample(),
// resource
/* 20 */ $file_handle,
// undefined variable
/* 21 */ @$undefined_var,
// unset variable
/* 22 */ @$unset_var
);
// loop through with each element of the $inputs array to test count_chars() function
$count = 1;
foreach($inputs as $input) {
echo "-- Iteration $count --\n";
// only list characters with a frequency > 0
var_dump(count_chars($input, 1));
$count ++;
}
fclose($file_handle); //closing the file handle
?>
===DONE===
--EXPECTF--
*** Testing count_chars() function: with unexpected inputs for 'string' argument ***
-- Iteration 1 --
array(1) {
[48]=>
int(1)
}
-- Iteration 2 --
array(1) {
[49]=>
int(1)
}
-- Iteration 3 --
array(2) {
[50]=>
int(1)
[53]=>
int(2)
}
-- Iteration 4 --
array(3) {
[50]=>
int(1)
[53]=>
int(1)
[54]=>
int(1)
}
-- Iteration 5 --
array(7) {
[49]=>
int(1)
[50]=>
int(1)
[51]=>
int(1)
[52]=>
int(3)
[54]=>
int(1)
[55]=>
int(2)
[56]=>
int(1)
}
-- Iteration 6 --
array(8) {
[45]=>
int(1)
[49]=>
int(1)
[50]=>
int(1)
[51]=>
int(1)
[52]=>
int(3)
[54]=>
int(1)
[55]=>
int(1)
[56]=>
int(2)
}
-- Iteration 7 --
array(4) {
[46]=>
int(1)
[48]=>
int(1)
[49]=>
int(1)
[53]=>
int(1)
}
-- Iteration 8 --
array(5) {
[45]=>
int(1)
[46]=>
int(1)
[48]=>
int(1)
[50]=>
int(1)
[53]=>
int(1)
}
-- Iteration 9 --
array(8) {
[48]=>
int(4)
[49]=>
int(2)
[50]=>
int(1)
[51]=>
int(1)
[52]=>
int(1)
[53]=>
int(1)
[54]=>
int(1)
[55]=>
int(1)
}
-- Iteration 10 --
Warning: count_chars() expects parameter 1 to be string, array given in %s on line %d
NULL
-- Iteration 11 --
Warning: count_chars() expects parameter 1 to be string, array given in %s on line %d
NULL
-- Iteration 12 --
Warning: count_chars() expects parameter 1 to be string, array given in %s on line %d
NULL
-- Iteration 13 --
array(1) {
[49]=>
int(1)
}
-- Iteration 14 --
array(0) {
}
-- Iteration 15 --
array(1) {
[49]=>
int(1)
}
-- Iteration 16 --
array(0) {
}
-- Iteration 17 --
array(0) {
}
-- Iteration 18 --
array(0) {
}
-- Iteration 19 --
array(12) {
[32]=>
int(1)
[97]=>
int(1)
[98]=>
int(1)
[99]=>
int(1)
[101]=>
int(2)
[106]=>
int(1)
[108]=>
int(1)
[109]=>
int(1)
[111]=>
int(1)
[112]=>
int(1)
[115]=>
int(1)
[116]=>
int(1)
}
-- Iteration 20 --
Warning: count_chars() expects parameter 1 to be string, resource given in %s on line %d
NULL
-- Iteration 21 --
array(0) {
}
-- Iteration 22 --
array(0) {
}
===DONE===