PHP 在插入数据库之前删除空行

Question

我有一个从包含一些坐标的 xcode 中检索的字符串，当该字符串被插入到数据库中时，它显示为:

(
    "37.351701,-122.105898",
    "37.351945,-122.106109",
    "37.352183,-122.106338"
)

我需要的字符串是:

37.351701,-122.105898,
37.351945,-122.106109,
37.352183,-122.106338

我正在使用 str_replace，它删除了 () 但留下了一个空行:

//empty line
37.351701,-122.105898,
37.351945,-122.106109,
37.352183,-122.106338
//empty line

我正在使用的代码，如何删除空行？

<?php
$conn = mysql_connect($host, $user, $pass);
@mysql_select_db($db) or die("Unable to find database");
$trackArray = $_GET["trackArray"];

$trackArrayOutput = str_replace( array('"', '(' , ')', ' ', '\n', '\r', '\n\r'), '', $trackArray);

$query = "INSERT INTO routes VALUES ('', '$trackArrayOutput')";

mysql_query($query) or die (mysql_error("error"));
mysql_close();
?>

Answer 1

$myvar = " cool huh ?     ";

//trim it
$myvar = trim($myvar);

//now echo
echo $myvar ;  //result will be  

cool huh?