addslashes: This function adds backslashes to a string. It can be used to escape characters in a string that have a special meaning in PHP, such as quotes and backslashes.

$string_one = 'This is my essay.I\'m going to be talking about php.' ; $string_two= 'This is my essay. I will be talking about the subject php.' ; ...

It is a server side XHTML-embedded scripting language. When the server is requested an XHTML page with embedded PHP code, it calls the PHP interpreter and processes the document and sends the output ...