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1 --TEST--

2 Test trim() function

3 --FILE--

4 <?php

6 /* Prototype: string trim( string str [,string charlist] )

7 * Strip whitespace (or other characters) from the beginning and end of a string.

8 */

10 /* trim with unset/null/boolean variable - returns an empty string */

11 echo "\n";

12 $null_var = NULL;

13 var_dump( trim($null_var) );

14 $null_var = "";

15 var_dump( trim($null_var) );

16 $null_var = 0;

17 var_dump( trim($null_var) );

18 $bool_val = true;

19 var_dump( trim($null_var) );

21 /* second argument charlist as null - does not trim any white spaces */

22 var_dump( trim("\ttesting trim", "") );

23 var_dump( trim(" \ttesting trim ", NULL) );

24 var_dump( trim("\ttesting trim ", true) );

26 /* Use of class and objects */

27 echo "\n*** Testing with OBJECTS ***\n";

28 class string1

29 {

30 public function __toString() {

31 return "Object";

32 }

33 }

34 $obj = new string1;

35 var_dump( trim($obj, "Ot") );

37 /* String with embedded NULL */

38 echo "\n*** Testing with String with embedded NULL ***\n";

39 var_dump( trim("\x0n1234\x0005678\x0000efgh\xijkl\x0n1", "\x0n1") );

41 /* heredoc string */

42 $str = <<<EOD

43 us

44 ing heredoc string

45 EOD;

47 echo "\n*** Testing with heredoc string ***\n";

48 var_dump( trim($str, "us\ning") );

50 echo "\nDone";

51 ?>

52 --EXPECT--

53 string(0) ""

54 string(0) ""

55 string(1) "0"

56 string(1) "0"

57 string(13) " testing trim"

58 string(17) " testing trim "

59 string(15) " testing trim "

61 *** Testing with OBJECTS ***

62 string(4) "bjec"

64 *** Testing with String with embedded NULL ***

65 string(22) "234\005678\000efgh\xijkl"

67 *** Testing with heredoc string ***

68 string(12) " heredoc str"

70 Done