Some content ...
<hr />
Content under line ...

h2 {
  color: #cbdafb;
}

var str = "Web courses - http://CoursesWeb.net/";
if(str.indexOf("http://") == -1) alert("http:// isn`t in string");
else alert("http:// is in string");

$str = "apple,banana,melon,pear";
$arr = explode(",", $str);
var_export($arr);      // array (0=>"apple", 1=>"banana", 2=>"melon", 3=>"pear")