Questions about inserting the HTML code into MySQL

Problems with HTML code inserted into MySQL
Want to insert the following code into MySQL
Take over the task
Obtained ";
I use
$str 3 = "Take over the task
Obtained ";
Say inside the "escaped inserted MySQL or not why?" How do I get the HTML code above into MySQL?
I checked the Internet. Using the Addsalshes () function I wonder how the parameters inside the function are written in double quotation marks or escaped after the HTML code is directly enclosed in double quotes?

------Solution--------------------
Write wrong, the beginning of the STR3 do not add escape character \
Modify the following:

PHP Code

$str 3 = ' Take over the task  
Obtained "; ' $str 3 = addsalshes ($str 3);
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