The path to the file to open.

// File to open
$file = '/path/to/file/example.txt';

Set up the arrays to hold the search and replace words. Seperate each word with a comma and place each one in ("")

// Search and Replace Arrays
$search = array ('beer','pizza','hamburger','ice','food');
$replace = array ('soda','calzone','hotdog','water','drink');

Set up a handler to open the file and open it.

// Read through the file
$lines = file($file);

Begin reading the file and start searching through it line for line.

foreach ($lines as $line_num => $line) 
	{

Replace the words using the search/replace arrays.

	$text = preg_replace($search, $replace, $line);

Print the results to the screen, you could also output these results to a new file. The choice is yours.

	print $text;
	}

Here is the code in full, enjoy.

<?

// File to open
$file = '/path/to/file/example.txt';

// Search and Replace Arrays
$search = array('beer','pizza','hamburger','ice','food');
$replace = array('soda','calzone','hotdog','water','drink');

// Open the file
$lines = file($file);

// Read through the file
foreach($lines as $line_num => $line) {
    $text = preg_replace($search, $replace, $line);
    print $text;
}

?>

That is the end of the article, until next time... happy scripting.