--TEST--
Test fwrite() function : usage variations - r+, r+b & r+t modes
--SKIPIF--
<?php
if( substr(PHP_OS, 0, 3) == 'WIN' ) {
   die('skip...Not valid for Windows');
}
?>
--FILE--
<?php
echo "*** Testing fwrite() various  operations ***\n";

// include the file.inc for Function: function delete_file($filename)
include ("file.inc");

/*
 Test fwrite with file opened in mode : r+,r+b,r+t
 File having content of type numeric, text,text_with_new_line & alphanumeric
*/

$file_modes = array("r+", "r+b", "r+t");
$file_content_types = array("numeric","text","text_with_new_line","alphanumeric");


foreach($file_content_types as $file_content_type) {
  echo "\n-- Testing fwrite() with file having content of type ". $file_content_type ." --\n";

  /* open the file using $files_modes and perform fwrite() on it */
  foreach($file_modes as $file_mode) {
    echo "-- Opening file in $file_mode --\n";

    // create temp file and fill the data of type $file_content_type
    $filename = __DIR__."/fwrite_variation2.tmp"; // this is name of the file
    create_files ( __DIR__, 1, $file_content_type, 0755, 1, "w", "fwrite_variation", 2);

    $file_handle = fopen($filename, $file_mode);
    if(!$file_handle) {
      echo "Error: failed to fopen() file: $filename!";
      exit();
    }

    $data_to_be_written="";
    fill_buffer($data_to_be_written,$file_content_type,1024);  //get the data of size 1024

    /*  Write the data into the file, verify it by checking the file pointer position, eof position,
        filesize & by displaying the content */

    /*overwrite first 400 bytes in the file*/
    var_dump( ftell($file_handle) );  // expected : 0
    var_dump( fwrite($file_handle, $data_to_be_written, 400));
    var_dump( ftell($file_handle) );  // expected: 400
    var_dump( feof($file_handle) );  //Expecting bool(false)

    /*overwrite data in middle of the file*/
    fseek($file_handle, SEEK_SET, 1024/2 );
    var_dump( ftell($file_handle));  // expected: 1024/2
    var_dump( fwrite($file_handle, $data_to_be_written, 200) );
    var_dump( ftell($file_handle) );
    var_dump( feof($file_handle) );  //Expecting bool(false)

    /* write at the end of the file */
    fseek($file_handle, SEEK_END, 0);
    var_dump( ftell($file_handle) );  // expected: 1024
    var_dump( feof($file_handle) );
    var_dump( fwrite($file_handle, $data_to_be_written, 200) );
    var_dump( ftell($file_handle) );
    var_dump( feof($file_handle) );  //Expecting bool(false)

    /* display the file content, check the file size  */
    var_dump( fclose($file_handle) );
    clearstatcache();//clears file status cache
    var_dump( filesize($filename) );
    var_dump(md5(file_get_contents($filename)));
    delete_file($filename); // delete file with name fwrite_variation2.tmp
  } // end of inner foreach loop
} // end of outer foreach loop

echo "Done\n";
?>
--EXPECT--
*** Testing fwrite() various  operations ***

-- Testing fwrite() with file having content of type numeric --
-- Opening file in r+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "950b7457d1deb6332f2fc5d42f3129d6"
-- Opening file in r+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "950b7457d1deb6332f2fc5d42f3129d6"
-- Opening file in r+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "950b7457d1deb6332f2fc5d42f3129d6"

-- Testing fwrite() with file having content of type text --
-- Opening file in r+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "3bdaf80dae28bc24bb304daa5ffee16c"
-- Opening file in r+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "3bdaf80dae28bc24bb304daa5ffee16c"
-- Opening file in r+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "3bdaf80dae28bc24bb304daa5ffee16c"

-- Testing fwrite() with file having content of type text_with_new_line --
-- Opening file in r+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "b188d7c8aa229cbef067e5970f2daba9"
-- Opening file in r+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "b188d7c8aa229cbef067e5970f2daba9"
-- Opening file in r+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "b188d7c8aa229cbef067e5970f2daba9"

-- Testing fwrite() with file having content of type alphanumeric --
-- Opening file in r+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "5d4ec23a3d9dd447e2f702d9e0e114d9"
-- Opening file in r+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "5d4ec23a3d9dd447e2f702d9e0e114d9"
-- Opening file in r+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
int(2)
bool(false)
int(200)
int(202)
bool(false)
bool(true)
int(1024)
string(32) "5d4ec23a3d9dd447e2f702d9e0e114d9"
Done