1--TEST-- 2Test key(), current(), next() & reset() functions 3--FILE-- 4<?php 5/* Prototype & Usage: 6 mixed key ( array &$array ) -> returns the index element of the current array position 7 mixed current ( array &$array ) -> returns the current element in the array 8 mixed next ( array &$array ) -> similar to current() but advances the internal pointer to next element 9 mixed reset ( array &$array ) -> Reset the internal pointer to first element 10*/ 11 12$basic_arrays = array ( 13 array(0), // array with element as 0 14 array(1), // array with single element 15 array(1,2, 3, -1, -2, -3), // array of integers 16 array(1.1, 2.2, 3.3, -1.1, -2.2, -3.3), // array of floats 17 array('a', 'b', 'c', "ab", "ac", "ad"), // string array 18 array("a" => "apple", "b" => "book", "c" => "cook"), // associative array 19 array('d' => 'drink', 'p' => 'port', 's' => 'set'), // another associative array 20 array(1 => 'One', 2 => 'two', 3 => "three") // associative array with key as integers 21); 22 23$varient_arrays = array ( 24 array(), // empty array 25 array(""), // array with null string 26 array(NULL),// array with NULL 27 array(null),// array with null 28 array(NULL, true, null, "", 1), // mixed array 29 array(-1.5 => "test", -2 => "rest", 2.5 => "two", 30 "" => "string", 0 => "zero", "" => "" ) // mixed array 31); 32 33echo "*** Testing basic operations ***\n"; 34$loop_count = 1; 35foreach ($basic_arrays as $sub_array ) { 36 echo "-- Iteration $loop_count --\n"; 37 $loop_count++; 38 $c = count ($sub_array); 39 $c++; // increment by one to create the situation of accessing beyond array size 40 while ( $c ) { 41 var_dump( current($sub_array)); // current element 42 var_dump( key($sub_array) ); // key of the current element 43 var_dump( next($sub_array) ); // move to next element 44 $c --; 45 } 46 var_dump( reset($sub_array) ); // reset the internal pointer to first element 47 var_dump( key($sub_array) ); // access the array after reset 48 var_dump( $sub_array ); // dump the array to see that its intact 49 50 echo "\n"; 51} 52 53echo "\n*** Testing possible variations ***\n"; 54$loop_count = 1; 55foreach ($varient_arrays as $sub_array ) { 56 echo "-- Iteration $loop_count --\n"; 57 $loop_count++; 58 $c = count ($sub_array); 59 $c++; // increment by one to create the situation of accessing beyond array size 60 while ( $c ) { 61 var_dump( current($sub_array)); // current element 62 var_dump( key($sub_array) ); // key of the current element 63 var_dump( next($sub_array) ); // move to next element 64 $c --; 65 } 66 var_dump( reset($sub_array) ); // reset the internal pointer to first element 67 var_dump( key($sub_array) ); // access the array after reset 68 var_dump( $sub_array ); // dump the array to see that its intact 69 echo "\n"; 70} 71 72/*test these functions on array which is already unset */ 73echo "\n-- Testing variation: when array is unset --\n"; 74$unset_array = array (1); 75unset($unset_array); 76 77var_dump( current($unset_array) ); 78var_dump( key($unset_array) ); 79var_dump( next($unset_array) ); 80var_dump( reset($unset_array) ); 81 82 83echo "\n*** Testing error conditions ***\n"; 84//Zero argument, expected 1 argument 85var_dump( key() ); 86var_dump( current() ); 87var_dump( reset() ); 88var_dump( next() ); 89 90// args more than expected, expected 1 argument 91$temp_array = array(1); 92var_dump( key($temp_array, $temp_array) ); 93var_dump( current($temp_array, $temp_array) ); 94var_dump( reset($temp_array, $temp_array) ); 95var_dump( next($temp_array, $temp_array) ); 96 97// invalid args type, valid argument: array 98$int_var = 1; 99$float_var = 1.5; 100$string = "string"; 101var_dump( key($int_var) ); 102var_dump( key($float_var) ); 103var_dump( key($string) ); 104 105var_dump( current($int_var) ); 106var_dump( current($float_var) ); 107var_dump( current($string) ); 108 109var_dump( next($int_var) ); 110var_dump( next($float_var) ); 111var_dump( next($string) ); 112 113var_dump( reset($int_var) ); 114var_dump( reset($float_var) ); 115var_dump( reset($string) ); 116 117echo "Done\n"; 118?> 119--EXPECTF-- 120*** Testing basic operations *** 121-- Iteration 1 -- 122int(0) 123int(0) 124bool(false) 125bool(false) 126NULL 127bool(false) 128int(0) 129int(0) 130array(1) { 131 [0]=> 132 int(0) 133} 134 135-- Iteration 2 -- 136int(1) 137int(0) 138bool(false) 139bool(false) 140NULL 141bool(false) 142int(1) 143int(0) 144array(1) { 145 [0]=> 146 int(1) 147} 148 149-- Iteration 3 -- 150int(1) 151int(0) 152int(2) 153int(2) 154int(1) 155int(3) 156int(3) 157int(2) 158int(-1) 159int(-1) 160int(3) 161int(-2) 162int(-2) 163int(4) 164int(-3) 165int(-3) 166int(5) 167bool(false) 168bool(false) 169NULL 170bool(false) 171int(1) 172int(0) 173array(6) { 174 [0]=> 175 int(1) 176 [1]=> 177 int(2) 178 [2]=> 179 int(3) 180 [3]=> 181 int(-1) 182 [4]=> 183 int(-2) 184 [5]=> 185 int(-3) 186} 187 188-- Iteration 4 -- 189float(1.1) 190int(0) 191float(2.2) 192float(2.2) 193int(1) 194float(3.3) 195float(3.3) 196int(2) 197float(-1.1) 198float(-1.1) 199int(3) 200float(-2.2) 201float(-2.2) 202int(4) 203float(-3.3) 204float(-3.3) 205int(5) 206bool(false) 207bool(false) 208NULL 209bool(false) 210float(1.1) 211int(0) 212array(6) { 213 [0]=> 214 float(1.1) 215 [1]=> 216 float(2.2) 217 [2]=> 218 float(3.3) 219 [3]=> 220 float(-1.1) 221 [4]=> 222 float(-2.2) 223 [5]=> 224 float(-3.3) 225} 226 227-- Iteration 5 -- 228string(1) "a" 229int(0) 230string(1) "b" 231string(1) "b" 232int(1) 233string(1) "c" 234string(1) "c" 235int(2) 236string(2) "ab" 237string(2) "ab" 238int(3) 239string(2) "ac" 240string(2) "ac" 241int(4) 242string(2) "ad" 243string(2) "ad" 244int(5) 245bool(false) 246bool(false) 247NULL 248bool(false) 249string(1) "a" 250int(0) 251array(6) { 252 [0]=> 253 string(1) "a" 254 [1]=> 255 string(1) "b" 256 [2]=> 257 string(1) "c" 258 [3]=> 259 string(2) "ab" 260 [4]=> 261 string(2) "ac" 262 [5]=> 263 string(2) "ad" 264} 265 266-- Iteration 6 -- 267string(5) "apple" 268string(1) "a" 269string(4) "book" 270string(4) "book" 271string(1) "b" 272string(4) "cook" 273string(4) "cook" 274string(1) "c" 275bool(false) 276bool(false) 277NULL 278bool(false) 279string(5) "apple" 280string(1) "a" 281array(3) { 282 ["a"]=> 283 string(5) "apple" 284 ["b"]=> 285 string(4) "book" 286 ["c"]=> 287 string(4) "cook" 288} 289 290-- Iteration 7 -- 291string(5) "drink" 292string(1) "d" 293string(4) "port" 294string(4) "port" 295string(1) "p" 296string(3) "set" 297string(3) "set" 298string(1) "s" 299bool(false) 300bool(false) 301NULL 302bool(false) 303string(5) "drink" 304string(1) "d" 305array(3) { 306 ["d"]=> 307 string(5) "drink" 308 ["p"]=> 309 string(4) "port" 310 ["s"]=> 311 string(3) "set" 312} 313 314-- Iteration 8 -- 315string(3) "One" 316int(1) 317string(3) "two" 318string(3) "two" 319int(2) 320string(5) "three" 321string(5) "three" 322int(3) 323bool(false) 324bool(false) 325NULL 326bool(false) 327string(3) "One" 328int(1) 329array(3) { 330 [1]=> 331 string(3) "One" 332 [2]=> 333 string(3) "two" 334 [3]=> 335 string(5) "three" 336} 337 338 339*** Testing possible variations *** 340-- Iteration 1 -- 341bool(false) 342NULL 343bool(false) 344bool(false) 345NULL 346array(0) { 347} 348 349-- Iteration 2 -- 350string(0) "" 351int(0) 352bool(false) 353bool(false) 354NULL 355bool(false) 356string(0) "" 357int(0) 358array(1) { 359 [0]=> 360 string(0) "" 361} 362 363-- Iteration 3 -- 364NULL 365int(0) 366bool(false) 367bool(false) 368NULL 369bool(false) 370NULL 371int(0) 372array(1) { 373 [0]=> 374 NULL 375} 376 377-- Iteration 4 -- 378NULL 379int(0) 380bool(false) 381bool(false) 382NULL 383bool(false) 384NULL 385int(0) 386array(1) { 387 [0]=> 388 NULL 389} 390 391-- Iteration 5 -- 392NULL 393int(0) 394bool(true) 395bool(true) 396int(1) 397NULL 398NULL 399int(2) 400string(0) "" 401string(0) "" 402int(3) 403int(1) 404int(1) 405int(4) 406bool(false) 407bool(false) 408NULL 409bool(false) 410NULL 411int(0) 412array(5) { 413 [0]=> 414 NULL 415 [1]=> 416 bool(true) 417 [2]=> 418 NULL 419 [3]=> 420 string(0) "" 421 [4]=> 422 int(1) 423} 424 425-- Iteration 6 -- 426string(4) "test" 427int(-1) 428string(4) "rest" 429string(4) "rest" 430int(-2) 431string(3) "two" 432string(3) "two" 433int(2) 434string(0) "" 435string(0) "" 436string(0) "" 437string(4) "zero" 438string(4) "zero" 439int(0) 440bool(false) 441bool(false) 442NULL 443bool(false) 444string(4) "test" 445int(-1) 446array(5) { 447 [-1]=> 448 string(4) "test" 449 [-2]=> 450 string(4) "rest" 451 [2]=> 452 string(3) "two" 453 [""]=> 454 string(0) "" 455 [0]=> 456 string(4) "zero" 457} 458 459 460-- Testing variation: when array is unset -- 461 462Notice: Undefined variable: unset_array in %s on line %d 463 464Warning: current() expects parameter 1 to be array, null given in %s on line %d 465NULL 466 467Notice: Undefined variable: unset_array in %s on line %d 468 469Warning: key() expects parameter 1 to be array, null given in %s on line %d 470NULL 471 472Warning: next() expects parameter 1 to be array, null given in %s on line %d 473NULL 474 475Warning: reset() expects parameter 1 to be array, null given in %s on line %d 476NULL 477 478*** Testing error conditions *** 479 480Warning: key() expects exactly 1 parameter, 0 given in %s on line %d 481NULL 482 483Warning: current() expects exactly 1 parameter, 0 given in %s on line %d 484NULL 485 486Warning: reset() expects exactly 1 parameter, 0 given in %s on line %d 487NULL 488 489Warning: next() expects exactly 1 parameter, 0 given in %s on line %d 490NULL 491 492Warning: key() expects exactly 1 parameter, 2 given in %s on line %d 493NULL 494 495Warning: current() expects exactly 1 parameter, 2 given in %s on line %d 496NULL 497 498Warning: reset() expects exactly 1 parameter, 2 given in %s on line %d 499NULL 500 501Warning: next() expects exactly 1 parameter, 2 given in %s on line %d 502NULL 503 504Warning: key() expects parameter 1 to be array, integer given in %s on line %d 505NULL 506 507Warning: key() expects parameter 1 to be array, float given in %s on line %d 508NULL 509 510Warning: key() expects parameter 1 to be array, string given in %s on line %d 511NULL 512 513Warning: current() expects parameter 1 to be array, integer given in %s on line %d 514NULL 515 516Warning: current() expects parameter 1 to be array, float given in %s on line %d 517NULL 518 519Warning: current() expects parameter 1 to be array, string given in %s on line %d 520NULL 521 522Warning: next() expects parameter 1 to be array, integer given in %s on line %d 523NULL 524 525Warning: next() expects parameter 1 to be array, float given in %s on line %d 526NULL 527 528Warning: next() expects parameter 1 to be array, string given in %s on line %d 529NULL 530 531Warning: reset() expects parameter 1 to be array, integer given in %s on line %d 532NULL 533 534Warning: reset() expects parameter 1 to be array, float given in %s on line %d 535NULL 536 537Warning: reset() expects parameter 1 to be array, string given in %s on line %d 538NULL 539Done 540
