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--TEST-- Test strtr() function : usage variations - unexpected inputs for 'str' argument --FILE-- <?php /* Prototype : string strtr(string $str, string $from[, string $to]); string strtr(string $str, array $replace_pairs); * Description: Translates characters in str using given translation tables * Source code: ext/standard/string.c */ /* Test strtr() function: with unexpected inputs for 'str' * and expected type for 'from' & 'to' arguments */ echo "*** Testing strtr() function: with unexpected inputs for 'str' ***\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 $strings = array ( // integer values /*1*/ 0, 1, -2, // float values /*4*/ 10.5, -20.5, 10.1234567e10, // array values /*7*/ array(), array(0), array(1, 2), // boolean values /*10*/ true, false, TRUE, FALSE, // null vlaues /*14*/ NULL, null, // objects /*16*/ new sample(), // resource /*17*/ $file_handle, // undefined variable /*18*/ @$undefined_var, // unset variable /*19*/ @$unset_var ); //defining 'from' argument $from = "012atm"; //defining 'to' argument $to = "atm012"; // loop through with each element of the $strings array to test strtr() function $count = 1; for($index = 0; $index < count($strings); $index++) { echo "-- Iteration $count --\n"; $str = $strings[$index]; var_dump( strtr($str, $from, $to) ); $count ++; } fclose($file_handle); //closing the file handle ?> ===DONE=== --EXPECTF-- *** Testing strtr() function: with unexpected inputs for 'str' *** -- Iteration 1 -- string(1) "a" -- Iteration 2 -- string(1) "t" -- Iteration 3 -- string(2) "-m" -- Iteration 4 -- string(4) "ta.5" -- Iteration 5 -- string(5) "-ma.5" -- Iteration 6 -- string(12) "tatm34567aaa" -- Iteration 7 -- Warning: strtr() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 8 -- Warning: strtr() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 9 -- Warning: strtr() expects parameter 1 to be string, array given in %s on line %d NULL -- Iteration 10 -- string(1) "t" -- Iteration 11 -- string(0) "" -- Iteration 12 -- string(1) "t" -- Iteration 13 -- string(0) "" -- Iteration 14 -- string(0) "" -- Iteration 15 -- string(0) "" -- Iteration 16 -- string(13) "s02ple objec1" -- Iteration 17 -- Warning: strtr() expects parameter 1 to be string, resource given in %s on line %d NULL -- Iteration 18 -- string(0) "" -- Iteration 19 -- string(0) "" ===DONE===