--TEST--
Test fwrite() function : usage variations - a, ab, at, a+, a+b & a+t mode
--SKIPIF--
<?php
if( substr(PHP_OS, 0, 3) != 'WIN' ) {
   die('skip...Not valid for Linux');
}
?>
--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 : a,ab,at,a+,a+b,a+
 File having content of type numeric, text,text_with_new_line & alphanumeric
*/

$file_modes = array("a","ab","at","a+","a+b","a+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 it content of type $file_content_type
    $filename = __DIR__."/fwrite_variation3.tmp"; // this is name of the file
    create_files ( __DIR__, 1, $file_content_type, 0755, 1, "w", "fwrite_variation", 3);

    $file_handle = fopen($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 */
    // append the data to the file, starting from current position of the file pointer
    var_dump( ftell($file_handle) ); // expected: 1024
    var_dump( fwrite($file_handle,$data_to_be_written,400) );
    var_dump( ftell($file_handle) ); // expected: 1024 + 400
    var_dump( feof($file_handle) );  // expected : true

    /*overwrite data in middle of the file*/
    fseek($file_handle, SEEK_SET, (1024 + 400)/2 );
    var_dump( ftell($file_handle));  // expected: (1024 + 400)/2
    var_dump( fwrite($file_handle, $data_to_be_written, 200) );
    var_dump( ftell($file_handle) );
    var_dump( feof($file_handle) );  //Expecting bool(false)

    /* check the filesize and display file content */
    // close the file, get the size and content of the file.
    var_dump( fclose($file_handle) );
    clearstatcache();//clears file status cache
    var_dump( filesize($filename) );
    var_dump(md5(file_get_contents($filename)));
    // delete the file created
    delete_file($filename); // delete file with name fwrite_variation3.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 a --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "59ce5bf03b69069d00d6354bdc969ff6"
-- Opening file in ab --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "59ce5bf03b69069d00d6354bdc969ff6"
-- Opening file in at --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "59ce5bf03b69069d00d6354bdc969ff6"
-- Opening file in a+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "59ce5bf03b69069d00d6354bdc969ff6"
-- Opening file in a+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "59ce5bf03b69069d00d6354bdc969ff6"
-- Opening file in a+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "59ce5bf03b69069d00d6354bdc969ff6"

-- Testing fwrite() with file having content of type text --
-- Opening file in a --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "dbd9dffd809d82e299bc1e5c55087f3b"
-- Opening file in ab --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "dbd9dffd809d82e299bc1e5c55087f3b"
-- Opening file in at --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "dbd9dffd809d82e299bc1e5c55087f3b"
-- Opening file in a+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "dbd9dffd809d82e299bc1e5c55087f3b"
-- Opening file in a+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "dbd9dffd809d82e299bc1e5c55087f3b"
-- Opening file in a+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "dbd9dffd809d82e299bc1e5c55087f3b"

-- Testing fwrite() with file having content of type text_with_new_line --
-- Opening file in a --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "3f0a483fe8a2f405677844e0b1af6cf4"
-- Opening file in ab --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "3f0a483fe8a2f405677844e0b1af6cf4"
-- Opening file in at --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1690)
string(32) "656648355b64df6fded53b12fb355ab8"
-- Opening file in a+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "3f0a483fe8a2f405677844e0b1af6cf4"
-- Opening file in a+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "3f0a483fe8a2f405677844e0b1af6cf4"
-- Opening file in a+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1690)
string(32) "656648355b64df6fded53b12fb355ab8"

-- Testing fwrite() with file having content of type alphanumeric --
-- Opening file in a --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "ea0c0bfa0b10aa8e614fd33ffe295cb9"
-- Opening file in ab --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "ea0c0bfa0b10aa8e614fd33ffe295cb9"
-- Opening file in at --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "ea0c0bfa0b10aa8e614fd33ffe295cb9"
-- Opening file in a+ --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "ea0c0bfa0b10aa8e614fd33ffe295cb9"
-- Opening file in a+b --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "ea0c0bfa0b10aa8e614fd33ffe295cb9"
-- Opening file in a+t --
int(0)
int(400)
int(400)
bool(false)
int(400)
int(200)
int(600)
bool(false)
bool(true)
int(1624)
string(32) "ea0c0bfa0b10aa8e614fd33ffe295cb9"
Done