1--TEST-- 2Test trim() function 3--FILE-- 4<?php 5 6/* Prototype: string trim( string str [,string charlist] ) 7 * Strip whitespace (or other characters) from the beginning and end of a string. 8 */ 9 10/* trim with unset/null/boolean variable - returns an empty string */ 11echo "\n"; 12$null_var = NULL; 13var_dump( trim($null_var) ); 14$null_var = ""; 15var_dump( trim($null_var) ); 16$null_var = 0; 17var_dump( trim($null_var) ); 18$bool_val = true; 19var_dump( trim($null_var) ); 20 21/* second argument charlist as null - does not trim any white spaces */ 22var_dump( trim("\ttesting trim", "") ); 23var_dump( trim(" \ttesting trim ", NULL) ); 24var_dump( trim("\ttesting trim ", true) ); 25 26/* Testing error conditions */ 27echo "\n*** Testing error conditions ***\n"; 28 29//Zero arguments 30var_dump( trim() ); 31// More than expected number of args */ 32var_dump( trim("\tstring\n", "\t\n", $null_var) ); 33var_dump( trim(NULL, "", NULL ) ); 34 35 36/* Use of class and objects */ 37echo "\n*** Testing with OBJECTS ***\n"; 38class string1 39{ 40 public function __toString() { 41 return "Object"; 42 } 43} 44$obj = new string1; 45var_dump( trim($obj, "Ot") ); 46 47/* String with embedded NULL */ 48echo "\n*** Testing with String with embedded NULL ***\n"; 49var_dump( trim("\x0n1234\x0005678\x0000efgh\xijkl\x0n1", "\x0n1") ); 50 51/* heredoc string */ 52$str = <<<EOD 53us 54ing heredoc string 55EOD; 56 57echo "\n*** Testing with heredoc string ***\n"; 58var_dump( trim($str, "us\ning") ); 59 60echo "\nDone"; 61?> 62--EXPECTF-- 63string(0) "" 64string(0) "" 65string(1) "0" 66string(1) "0" 67string(13) " testing trim" 68string(17) " testing trim " 69string(15) " testing trim " 70 71*** Testing error conditions *** 72 73Warning: trim() expects at least 1 parameter, 0 given in %s on line %d 74NULL 75 76Warning: trim() expects at most 2 parameters, 3 given in %s on line %d 77NULL 78 79Warning: trim() expects at most 2 parameters, 3 given in %s on line %d 80NULL 81 82*** Testing with OBJECTS *** 83string(4) "bjec" 84 85*** Testing with String with embedded NULL *** 86string(22) "234�05678�00efgh\xijkl" 87 88*** Testing with heredoc string *** 89string(12) " heredoc str" 90 91Done 92
