You are storing orders from your online store in a flat file (a simple text file

Question

You are storing orders from your online store in a flat file (a simple text file). Given a string that represents a customer order, complete the following code to append the customer data to a file.

// Assume: all variables are defined previously
$outputstring = $date." ".$tireqty." tires ".$oilqty." oil " .$sparkqty." spark plugs $".$totalamount ." ". $address." ";

Blank 1 $fp = Blank 2 ("$DOCUMENT_ROOT/../orders/orders.txt", Blank 3 );
if (!$fp) {
echo '<p><strong> Your order could not be processed at this time. ' .'Please try again later.</strong></p></body></html>';
exit;
}

flock($fp, LOCK_EX);
Blank 4 ($fp, Blank 5 , Blank 6 );
flock($fp, LOCK_UN);
Blank 7 ($fp);

echo '<p>Order written.</p>';

Explanation / Answer

Blank 1 - @

Blank 2 - fopen // Opening the file

Blank 3 - 'ab'

Blank 4 - fwrite // writing to the file

Blank 5 - $outputstring   

Blank 6 - strlen($outputstring) // length of the output string

Blank 7 - fclose // closing the file

// So rewriting the program by filling in the blanks:

$outputstring = $date." ".$tireqty." tires ".$oilqty." oil " .$sparkqty." spark plugs $".$totalamount ." ". $address." ";

@ $fp = fopen ("$DOCUMENT_ROOT/../orders/orders.txt", 'ab' );
if (!$fp) {
echo '<p><strong> Your order could not be processed at this time. ' .'Please try again later.</strong></p></body></html>';
exit;
}

flock($fp, LOCK_EX);
fwrite ($fp, outputstring , strlen(outputstring) );
flock($fp, LOCK_UN);
fclose ($fp);

echo '<p>Order written.</p>';

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