25. April 2012
This is how you can show the user agent with Server Side Includes:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title>SSI Page</title>
</head>
<body>
<!--#echo var="HTTP_USER_AGENT" -->
</body>
</html>
24. April 2012
This is how you can show the user agent in JavaServer Pages (JSP):
Version 1
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JSP Page</title>
</head>
<body>
<%
String userAgent = request.getHeader("user-agent");
out.print(userAgent);
%>
</body>
</html>Version 2
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JSP Page</title>
</head>
<body>
<%
String userAgent = request.getHeader("user-agent");
%>
<%= userAgent %>
</body>
</html>Version 3
<%@taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JSP Page</title>
</head>
<body>
<c:out value="${header['User-Agent']}" />
</body>
</html>Version 4
<%@taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JSP Page</title>
</head>
<body>
<c:set var="userAgent" scope="page" value="${header['User-Agent']}"/>
<c:out value="${userAgent}" />
</body>
</html>Version 5
<%@taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JSP Page</title>
</head>
<body>
<c:set var="userAgent" scope="page" value="${header['User-Agent']}"/>
<%=pageContext.getAttribute("userAgent")%>
</body>
</html>
23. April 2012
If you want a jQuery UI slider with labels that looks like this:
Then this JavaScript code might help you:
$('#slider').slider({ min: 1, max: 20, step: 1, value: 16, create: function(event,ui){ $('a.ui-slider-handle').css({'text-decoration':'none','text-align':'center'}).text($(this).slider("value")); }, slide: function(event,ui){ $('a.ui-slider-handle').css({'text-decoration':'none','text-align':'center'}).text(ui.value); } });
22. April 2012
The syntax of JavaScript and PHP is very similar. How similar is shown by the following function that I wrote to generate a random password:
PHP code:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | <?php function randomPassword($length){ $password = ""; for($i=0; $i<$length; $i++){ $func = rand(0,2); if($func == 0) $password = $password.chr(rand(48,57)); else if($func == 1) $password = $password.chr(rand(65,90)); else if($func == 2) $password = $password.chr(rand(97,122)); } return $password; } $randomPassword = randomPassword(20); echo($randomPassword); ?> |
JavaScript code:
<script type="text/javascript" line="1"> function rand(min,max){ if (arguments.length === 0){ min = 0; max = 32767; } return Math.floor(Math.random() * (max - min + 1)) + min; } String.prototype.chr = function(code){ return String.fromCharCode(code); } function randomPassword($length){ $password = ""; for($i=0; $i<$length; $i++){ $func = rand(0,2); if($func == 0) $password += $password.chr(rand(48,57)); else if($func == 1) $password += $password.chr(rand(65,90)); else if($func == 2) $password += $password.chr(rand(97,122)); } return $password; } $randomPassword = randomPassword(20); document.write($randomPassword); </script>
21. April 2012
The lower case letter “a” has ASCII code “97″ and can be generated in PHP like this:
<?php $a = chr(97); echo $a; ?>
In JavaScript, the same can be accomplished by:
<script type="text/javascript"> var a = String.fromCharCode(97); document.write(a); </script>
And this is how it works in Java:
public static void main(String[] args){ String a = new Character((char) 97).toString(); System.out.println(a); }
20. April 2012
In PHP the rand() function returns a random number between a given minimum and maximum (by default 0 and 32767). The whole looks like this:
<?php $randomNumber = rand(1,100); // random number between 1 and 100 echo $randomNumber; ?>
The same function can be rebuild with JavaScript:
<script type="text/javascript"> function rand(min,max){ if (arguments.length === 0){ min = 0; max = 32767; } return Math.floor(Math.random() * (max - min + 1)) + min; } var randomNumber = rand(1,100); // random number between 1 and 100 document.write(randomNumber); </script>
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