Update Database When Form Input Contains Apostrophe?

I have created a form which pulls info from a mysql db, allowing user to edit the details by overtyping but I am tearing my hair out with a problem I am getting when the user enters an apostrophe. I will try to illustrate with a few select lines of code first.Form page code excerpt:

Code:
<form method="post" action="admin_confirm_edit.php">
<textarea name="newmaindesc" cols="70" rows="10"><?php echo $row[6]; ?>



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Use Arrays For Form Input And Update Respective Database Records?

I'm new to PHP... I want to know how to populate a form from mySQL. I'm stumped at the input section where I am trying to allow the user to select choices for radio button /checkbox for each record. TCHere's a snippet of my code:

<?php
$mQuantity = 1;
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[code]...

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[Code]...

Whats the disadvantages of using mysql_real_escape_string, and where shall i put the stripslashes($user_name) when i display it back on a page or it will have the ""? as shown in line 2 above. Finally, another way i heard of is changing all they mysql insert statements to something like:

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Here is my code:
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[code]...

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PHP Code:

<?php
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[code]....

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here is the code

<?php
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?>
<a href="adminlogout.php">Logout</a><br />
<?php
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<?php
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<?php
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