including text problem

[auriaks]

Hi, i have include.php

<?php
$culture = "Good luck searching! And thanks for coming.";
?>

where i write masseges and they appear i my webpage.
But, faced problem when i want to write someting in " " or ' '. It splits my variable. How i can write don't or "music" without any problems?

I will be thenkfull if someone could tell me how to fix the same problem in my mysql inserting php script:

<?php
//connect to the database 
$connect = mysql_connect("","","") or die("Error connecting to db"); 
//select table 
mysql_select_db("") or die("Error selecting db"); 

$date = date("Y-m-d"); 
$time = date("H:i:s");
$type = $_POST['type'];

if($_POST['product'] == '') {
    $error .= "<li>None or same product</li>";
}
if($_POST['about'] == '') {
    $error .= "<li>Insert your description</li>";
}
if($_POST['url'] == '') {
    $error .= "<li>Insert link</li>";
}
if(isset($_POST['submit'])) {
    if(isset($error)) {
        echo '<font color="#ff0000">Cant insert. Mistakes:';
        echo '<ol>'.$error.'</ol></font>';
    } else {
        echo '<font color="Green">Inserted!</font>';
        mysql_query("INSERT INTO this (product, about, date, time, url) 
        VALUES('$_POST[product]', '$_POST[about]', '$date', '$time', '$_POST[url]')") or die(mysql_error());
    }
}

?>

Thanks a LOT

[traq]

You need to escape the quotes.

//if you're using double-quotes to define the string, 
//escape double-quotes inside the string
$string = "I said \"Hello\" to my brother's friend";

//if you're using single-quotes to define the string, 
//escape single-quotes inside the string
$string = 'I said "Hello" to my brother\'s friend'; 

Just FYI:
Single-quotes have some advantage in parsing time, so I usually use them if the string is only text. In order to evaluate variables, however, you need to use double-quotes:

$name = 'Joe Smith';
$hiJoe = "Hi, $name";  // outputs: Hi, Joe Simth
$hiJoe = 'Hi, $name';  //  wrong- outputs: Hi, $name 

Your SQL problem is the array variables - MySQL doesn't like them. Assign the values to strings first:

$product = $_POST['product'];
$about = $_POST['about'];
$url = $_POST['url'];
mysql_query("INSERT INTO this (product, about, date, time, url) 
        VALUES('$product', '$about', '$date', '$time', '$url')") 

[auriaks]

what if i want to use both " " and ' ' in my script?

[traq]

you can. (see my example.) For each $string, just make sure you escape ( \ ) whichever style quote you used to open and close it.

// string opened & closed with single quotes: escape all single quotes inside the string.
$single = 'I\'m using "quotes"';
// string opened & closed with double quotes: escape all double quotes inside the string.
$double= "I'm using \"quotes\"";