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--TEST-- Test str_split() function : usage variations - different single quoted strings for 'str' argument --FILE-- <?php /* Prototype : array str_split(string $str [, int $split_length]) * Description: Convert a string to an array. If split_length is specified, break the string down into chunks each split_length characters long. * Source code: ext/standard/string.c * Alias to functions: none */ /* * passing different single quoted strings as 'str' argument to str_split() * split_length is set to 5 */ echo "*** Testing str_split() : single quoted strings for 'str' ***\n"; //Initialize variables $split_length = 5; // different values for 'str' $values = array( '', //empty ' ', //space '1234', //with only numbers 'simple string', //regular string 'It\'s string with quote', //string containing single quote 'string\tcontains\rwhite space\nchars', 'containing @ # $ % ^ & chars', 'with 1234 numbers', 'with \0 and ".chr(0)."null chars', //for binary safe 'with multiple space char', 'Testing invalid \k and \m escape char', 'to check with \\n and \\t' //ignoring \n and \t results ); //loop through each element of $values for 'str' argument for($count = 0; $count < count($values); $count++) { echo "-- Iteration ".($count+1)." --\n"; var_dump( str_split($values[$count], $split_length) ); } echo "Done" ?> --EXPECTF-- *** Testing str_split() : single quoted strings for 'str' *** -- Iteration 1 -- array(1) { [0]=> string(0) "" } -- Iteration 2 -- array(1) { [0]=> string(1) " " } -- Iteration 3 -- array(1) { [0]=> string(4) "1234" } -- Iteration 4 -- array(3) { [0]=> string(5) "simpl" [1]=> string(5) "e str" [2]=> string(3) "ing" } -- Iteration 5 -- array(5) { [0]=> string(5) "It's " [1]=> string(5) "strin" [2]=> string(5) "g wit" [3]=> string(5) "h quo" [4]=> string(2) "te" } -- Iteration 6 -- array(8) { [0]=> string(5) "strin" [1]=> string(5) "g\tco" [2]=> string(5) "ntain" [3]=> string(5) "s\rwh" [4]=> string(5) "ite s" [5]=> string(5) "pace\" [6]=> string(5) "nchar" [7]=> string(1) "s" } -- Iteration 7 -- array(6) { [0]=> string(5) "conta" [1]=> string(5) "ining" [2]=> string(5) " @ # " [3]=> string(5) "$ % ^" [4]=> string(5) " & ch" [5]=> string(3) "ars" } -- Iteration 8 -- array(4) { [0]=> string(5) "with " [1]=> string(5) "1234 " [2]=> string(5) "numbe" [3]=> string(2) "rs" } -- Iteration 9 -- array(7) { [0]=> string(5) "with " [1]=> string(5) "\0 an" [2]=> string(5) "d ".c" [3]=> string(5) "hr(0)" [4]=> string(5) "."nul" [5]=> string(5) "l cha" [6]=> string(2) "rs" } -- Iteration 10 -- array(7) { [0]=> string(5) "with " [1]=> string(5) " mu" [2]=> string(5) "ltipl" [3]=> string(5) "e " [4]=> string(5) " spac" [5]=> string(5) "e cha" [6]=> string(1) "r" } -- Iteration 11 -- array(8) { [0]=> string(5) "Testi" [1]=> string(5) "ng in" [2]=> string(5) "valid" [3]=> string(5) " \k a" [4]=> string(5) "nd \m" [5]=> string(5) " esca" [6]=> string(5) "pe ch" [7]=> string(2) "ar" } -- Iteration 12 -- array(5) { [0]=> string(5) "to ch" [1]=> string(5) "eck w" [2]=> string(5) "ith \" [3]=> string(5) "n and" [4]=> string(3) " \t" } Done