1--TEST-- 2Test fseek(), ftell() & rewind() functions : usage variations - all w and x modes, default whence 3--SKIPIF-- 4<?php 5if( substr(PHP_OS, 0, 3) != "WIN" ) 6 die("skip.. only valid for Windows"); 7?> 8--FILE-- 9<?php 10/* Prototype: int fseek ( resource $handle, int $offset [, int $whence] ); 11 Description: Seeks on a file pointer 12 13 Prototype: bool rewind ( resource $handle ); 14 Description: Rewind the position of a file pointer 15 16 Prototype: int ftell ( resource $handle ); 17 Description: Tells file pointer read/write position 18*/ 19 20// include the file.inc for common functions for test 21include ("file.inc"); 22 23/* Testing fseek(),ftell(),rewind() functions 24 1. All write and create with write modes 25 2. Testing fseek() without using argument whence 26*/ 27 28echo "*** Testing fseek(), ftell(), rewind() : default whence & all w and x modes ***\n"; 29$file_modes = array( "w","wb","wt","w+","w+b","w+t", 30 "x","xb","xt","x+","x+b","x+t"); 31$file_content_types = array( "text_with_new_line","alphanumeric"); 32 33$offset = array(-1, 0, 1, 513); // different offsets, including negative and beyond size 34 35$filename = dirname(__FILE__)."/fseek_ftell_rewind_variation2.tmp"; // this is name of the file created by create_files() 36 37/* open the file using $files_modes and perform fseek(),ftell() and rewind() on it */ 38foreach($file_content_types as $file_content_type){ 39 echo "\n-- File having data of type ". $file_content_type ." --\n"; 40 41 foreach($file_modes as $file_mode) { 42 echo "-- File opened in mode ".$file_mode." --\n"; 43 $file_handle = fopen($filename, $file_mode); 44 if (!$file_handle){ 45 echo "Error: failed to fopen() file: $filename!"; 46 exit(); 47 } 48 $data_to_be_written=""; 49 fill_buffer($data_to_be_written, $file_content_type, 512); //get the data of size 512 50 $data_to_be_written = $data_to_be_written; 51 fwrite($file_handle,(binary)$data_to_be_written); 52 rewind($file_handle); 53 54 echo "-- Testing fseek() without using argument whence --\n"; 55 foreach($offset as $count){ 56 var_dump( fseek($file_handle,$count) ); 57 var_dump( ftell($file_handle) ); // confirm the file pointer position 58 var_dump( feof($file_handle) ); //ensure that file pointer is not at end 59 } //end of offset loop 60 61 //close the file and check the size 62 fclose($file_handle); 63 var_dump( filesize($filename) ); 64 65 delete_file($filename); // delete file with name 66 } //end of file_mode loop 67} //end of file_content_types loop 68 69echo "Done\n"; 70?> 71--EXPECTF-- 72*** Testing fseek(), ftell(), rewind() : default whence & all w and x modes *** 73 74-- File having data of type text_with_new_line -- 75-- File opened in mode w -- 76-- Testing fseek() without using argument whence -- 77int(-1) 78int(0) 79bool(false) 80int(0) 81int(0) 82bool(false) 83int(0) 84int(1) 85bool(false) 86int(0) 87int(513) 88bool(false) 89int(512) 90-- File opened in mode wb -- 91-- Testing fseek() without using argument whence -- 92int(-1) 93int(0) 94bool(false) 95int(0) 96int(0) 97bool(false) 98int(0) 99int(1) 100bool(false) 101int(0) 102int(513) 103bool(false) 104int(512) 105-- File opened in mode wt -- 106-- Testing fseek() without using argument whence -- 107int(-1) 108int(0) 109bool(false) 110int(0) 111int(0) 112bool(false) 113int(0) 114int(1) 115bool(false) 116int(0) 117int(513) 118bool(false) 119int(569) 120-- File opened in mode w+ -- 121-- Testing fseek() without using argument whence -- 122int(-1) 123int(0) 124bool(false) 125int(0) 126int(0) 127bool(false) 128int(0) 129int(1) 130bool(false) 131int(0) 132int(513) 133bool(false) 134int(512) 135-- File opened in mode w+b -- 136-- Testing fseek() without using argument whence -- 137int(-1) 138int(0) 139bool(false) 140int(0) 141int(0) 142bool(false) 143int(0) 144int(1) 145bool(false) 146int(0) 147int(513) 148bool(false) 149int(512) 150-- File opened in mode w+t -- 151-- Testing fseek() without using argument whence -- 152int(-1) 153int(0) 154bool(false) 155int(0) 156int(0) 157bool(false) 158int(0) 159int(1) 160bool(false) 161int(0) 162int(513) 163bool(false) 164int(569) 165-- File opened in mode x -- 166-- Testing fseek() without using argument whence -- 167int(-1) 168int(0) 169bool(false) 170int(0) 171int(0) 172bool(false) 173int(0) 174int(1) 175bool(false) 176int(0) 177int(513) 178bool(false) 179int(512) 180-- File opened in mode xb -- 181-- Testing fseek() without using argument whence -- 182int(-1) 183int(0) 184bool(false) 185int(0) 186int(0) 187bool(false) 188int(0) 189int(1) 190bool(false) 191int(0) 192int(513) 193bool(false) 194int(512) 195-- File opened in mode xt -- 196-- Testing fseek() without using argument whence -- 197int(-1) 198int(0) 199bool(false) 200int(0) 201int(0) 202bool(false) 203int(0) 204int(1) 205bool(false) 206int(0) 207int(513) 208bool(false) 209int(569) 210-- File opened in mode x+ -- 211-- Testing fseek() without using argument whence -- 212int(-1) 213int(0) 214bool(false) 215int(0) 216int(0) 217bool(false) 218int(0) 219int(1) 220bool(false) 221int(0) 222int(513) 223bool(false) 224int(512) 225-- File opened in mode x+b -- 226-- Testing fseek() without using argument whence -- 227int(-1) 228int(0) 229bool(false) 230int(0) 231int(0) 232bool(false) 233int(0) 234int(1) 235bool(false) 236int(0) 237int(513) 238bool(false) 239int(512) 240-- File opened in mode x+t -- 241-- Testing fseek() without using argument whence -- 242int(-1) 243int(0) 244bool(false) 245int(0) 246int(0) 247bool(false) 248int(0) 249int(1) 250bool(false) 251int(0) 252int(513) 253bool(false) 254int(569) 255 256-- File having data of type alphanumeric -- 257-- File opened in mode w -- 258-- Testing fseek() without using argument whence -- 259int(-1) 260int(0) 261bool(false) 262int(0) 263int(0) 264bool(false) 265int(0) 266int(1) 267bool(false) 268int(0) 269int(513) 270bool(false) 271int(512) 272-- File opened in mode wb -- 273-- Testing fseek() without using argument whence -- 274int(-1) 275int(0) 276bool(false) 277int(0) 278int(0) 279bool(false) 280int(0) 281int(1) 282bool(false) 283int(0) 284int(513) 285bool(false) 286int(512) 287-- File opened in mode wt -- 288-- Testing fseek() without using argument whence -- 289int(-1) 290int(0) 291bool(false) 292int(0) 293int(0) 294bool(false) 295int(0) 296int(1) 297bool(false) 298int(0) 299int(513) 300bool(false) 301int(512) 302-- File opened in mode w+ -- 303-- Testing fseek() without using argument whence -- 304int(-1) 305int(0) 306bool(false) 307int(0) 308int(0) 309bool(false) 310int(0) 311int(1) 312bool(false) 313int(0) 314int(513) 315bool(false) 316int(512) 317-- File opened in mode w+b -- 318-- Testing fseek() without using argument whence -- 319int(-1) 320int(0) 321bool(false) 322int(0) 323int(0) 324bool(false) 325int(0) 326int(1) 327bool(false) 328int(0) 329int(513) 330bool(false) 331int(512) 332-- File opened in mode w+t -- 333-- Testing fseek() without using argument whence -- 334int(-1) 335int(0) 336bool(false) 337int(0) 338int(0) 339bool(false) 340int(0) 341int(1) 342bool(false) 343int(0) 344int(513) 345bool(false) 346int(512) 347-- File opened in mode x -- 348-- Testing fseek() without using argument whence -- 349int(-1) 350int(0) 351bool(false) 352int(0) 353int(0) 354bool(false) 355int(0) 356int(1) 357bool(false) 358int(0) 359int(513) 360bool(false) 361int(512) 362-- File opened in mode xb -- 363-- Testing fseek() without using argument whence -- 364int(-1) 365int(0) 366bool(false) 367int(0) 368int(0) 369bool(false) 370int(0) 371int(1) 372bool(false) 373int(0) 374int(513) 375bool(false) 376int(512) 377-- File opened in mode xt -- 378-- Testing fseek() without using argument whence -- 379int(-1) 380int(0) 381bool(false) 382int(0) 383int(0) 384bool(false) 385int(0) 386int(1) 387bool(false) 388int(0) 389int(513) 390bool(false) 391int(512) 392-- File opened in mode x+ -- 393-- Testing fseek() without using argument whence -- 394int(-1) 395int(0) 396bool(false) 397int(0) 398int(0) 399bool(false) 400int(0) 401int(1) 402bool(false) 403int(0) 404int(513) 405bool(false) 406int(512) 407-- File opened in mode x+b -- 408-- Testing fseek() without using argument whence -- 409int(-1) 410int(0) 411bool(false) 412int(0) 413int(0) 414bool(false) 415int(0) 416int(1) 417bool(false) 418int(0) 419int(513) 420bool(false) 421int(512) 422-- File opened in mode x+t -- 423-- Testing fseek() without using argument whence -- 424int(-1) 425int(0) 426bool(false) 427int(0) 428int(0) 429bool(false) 430int(0) 431int(1) 432bool(false) 433int(0) 434int(513) 435bool(false) 436int(512) 437Done 438