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--TEST-- Test explode() function : usage variations - test values for $limit argument --FILE-- <?php /* Prototype : array explode ( string $delimiter , string $string [, int $limit ] ) * Description: Split a string by string. * Source code: ext/standard/string.c */ echo "*** Testing explode() function: with unexpected inputs for 'limit' 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 $delimiter $limits = array ( // integer values /*1*/ 0, 1, 255, 256, 2147483647, -2147483648, // float values /*7*/ 10.5, -20.5, 10.1234567e5, // 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 $limits array to test explode() function $count = 1; $delimiter = " "; $string = "piece1 piece2 piece3 piece4 piece5 piece6"; foreach($limits as $limit) { echo "-- Iteration $count --\n"; var_dump( explode($delimiter, $string, $limit) ); $count ++; } fclose($file_handle); //closing the file handle ?> ===Done=== --EXPECTF-- *** Testing explode() function: with unexpected inputs for 'limit' argument *** -- Iteration 1 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 2 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 3 -- array(6) { [0]=> string(6) "piece1" [1]=> string(6) "piece2" [2]=> string(6) "piece3" [3]=> string(6) "piece4" [4]=> string(6) "piece5" [5]=> string(6) "piece6" } -- Iteration 4 -- array(6) { [0]=> string(6) "piece1" [1]=> string(6) "piece2" [2]=> string(6) "piece3" [3]=> string(6) "piece4" [4]=> string(6) "piece5" [5]=> string(6) "piece6" } -- Iteration 5 -- array(6) { [0]=> string(6) "piece1" [1]=> string(6) "piece2" [2]=> string(6) "piece3" [3]=> string(6) "piece4" [4]=> string(6) "piece5" [5]=> string(6) "piece6" } -- Iteration 6 -- array(0) { } -- Iteration 7 -- array(6) { [0]=> string(6) "piece1" [1]=> string(6) "piece2" [2]=> string(6) "piece3" [3]=> string(6) "piece4" [4]=> string(6) "piece5" [5]=> string(6) "piece6" } -- Iteration 8 -- array(0) { } -- Iteration 9 -- array(6) { [0]=> string(6) "piece1" [1]=> string(6) "piece2" [2]=> string(6) "piece3" [3]=> string(6) "piece4" [4]=> string(6) "piece5" [5]=> string(6) "piece6" } -- Iteration 10 -- Warning: explode() expects parameter 3 to be long, array given in %s on line %d NULL -- Iteration 11 -- Warning: explode() expects parameter 3 to be long, array given in %s on line %d NULL -- Iteration 12 -- Warning: explode() expects parameter 3 to be long, array given in %s on line %d NULL -- Iteration 13 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 14 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 15 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 16 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 17 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 18 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 19 -- Warning: explode() expects parameter 3 to be long, object given in %s on line %d NULL -- Iteration 20 -- Warning: explode() expects parameter 3 to be long, resource given in %s on line %d NULL -- Iteration 21 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } -- Iteration 22 -- array(1) { [0]=> string(41) "piece1 piece2 piece3 piece4 piece5 piece6" } ===Done===