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What else can I help you with?
How can you use a JavaScript variable in the PHP isset function?
You can't actually do that. There is no direct way to make JavaScript code talk to PHP code, as the two languages are interpreted in different locations. The PHP is interpreted by the server, and the JavaScript is interpreted by the client. This means it's easy enough to transfer data from PHP to JavaScript (by generating the JavaScript with the PHP), but not the other way around. If you're simply looking for a way to see if a JavaScript variable is set (from within the JavaScript itself), that can be done with a line like this one: if(myVariable !== undefined){ /* do stuff */} If you actually want to handle it on the PHP side, one way to do so would be to use additional PHP code when that happens. For example: <?php $jsVars = array(); ?> <script type="text/javascript"> var foo = 'bar'; <?php $jsVars['foo'] = 'bar';?> var yub = 'nub'; <?php $jsVars['yub'] = 'nub';?> </script> ... You can then check to see whether a certain variable has been set by seeing if it's in that array: <?php function jsIsset($varname){ global $jsVars; return array_key_exists($varname, $jsVars); } ?> This however, only works when the JavaScript is generated, not when it's interpreted by the client system. For example, imagine you have a variable that is defined by a JavaScript function that is called from an onclick event. By the time that event happens, the page has already been served and the PHP is done executing. If you want the JavaScript to tell the PHP that a variable is defined, you would need to do it through an AJAX request, which I believe is beyond the scope of this question.
How do you show dynamic time in a HTML page?
It is not possible to do it with HTML alone, you have to use Javascript, PHP or another scripting language that has the time as a built in function.
What is the php code to close the existing window using button?
It is not a PHP code but a Javascript code. w3schools.com has all the answers you need about Javascript. It will teach you how to use the code and implement it into your website. If you're creating your own websites I suggest you actually learn the code. It will come in handy later on.
How do you insert PHP code into JavaScript?
PHP is server-side code which means that the code is executed on the web server. The pages are dynamically created and sent to the user's browser. JavaScript is a client-side code which means that it runs on the user's computer after the page has been sent from the server. It is possible to combine PHP commands within JavaScript commands. You would mainly use this in setting up starting variables for your JavaScript. Example: ; …etc --> Another option is that you may consider using Ajax which allows you to dynamically call server-side code from JavaScript.
How do you add a click event to a java button?
we can do this using of javascript. you can use this following code: <input type=button value="button" onClick=onclick_function()> here onclick_function() is a function which is called by javascript on clicking the button. javascript code is as follows: <script language="javascript" type="text/javascript"> // your code for onclick_function() function onclick_function(){ alert("Welcome to javascript"); } </script>
How can you use a JavaScript variable in the PHP isset function?
You can't actually do that. There is no direct way to make JavaScript code talk to PHP code, as the two languages are interpreted in different locations. The PHP is interpreted by the server, and the JavaScript is interpreted by the client. This means it's easy enough to transfer data from PHP to JavaScript (by generating the JavaScript with the PHP), but not the other way around. If you're simply looking for a way to see if a JavaScript variable is set (from within the JavaScript itself), that can be done with a line like this one: if(myVariable !== undefined){ /* do stuff */} If you actually want to handle it on the PHP side, one way to do so would be to use additional PHP code when that happens. For example: <?php $jsVars = array(); ?> <script type="text/javascript"> var foo = 'bar'; <?php $jsVars['foo'] = 'bar';?> var yub = 'nub'; <?php $jsVars['yub'] = 'nub';?> </script> ... You can then check to see whether a certain variable has been set by seeing if it's in that array: <?php function jsIsset($varname){ global $jsVars; return array_key_exists($varname, $jsVars); } ?> This however, only works when the JavaScript is generated, not when it's interpreted by the client system. For example, imagine you have a variable that is defined by a JavaScript function that is called from an onclick event. By the time that event happens, the page has already been served and the PHP is done executing. If you want the JavaScript to tell the PHP that a variable is defined, you would need to do it through an AJAX request, which I believe is beyond the scope of this question.
How do you get the popup javascript box?
Use confirm or alert in javascript code to get a popup
How do you show dynamic time in a HTML page?
It is not possible to do it with HTML alone, you have to use Javascript, PHP or another scripting language that has the time as a built in function.
You use a Html button in Php on its onclick you made a function but its not responding?
this is not really a question... But I think you are asking why php functions inside a HTML button do not work. Well probably because php is rendered serverside and is passed to a user-browser afterwards.... it is possible to use php inside onclick... but only to display specific content (javascript function for instance)... it is not possible to let a user decide to run a specific php function by clicking a button.
What are the similarities between PHP and JavaScript?
there are not many similarities, except the if and else statements, loops, etc... but PHP talks to the server, JavaScript can't. That's why both languages have totally different functions. If you only use basic JavaScript, PHP doesn't differ too much.
Why we use javascript as we have a powerful scripting language php?
First of all, PHP is server side, Javascript is client side. You cannot detect mouse gestures or any clicks with PHP the same way you cannot read a file or modify it or process a form (unless you use AJAX of course). Also, although I love PHP, and it has useful extensions such as the GD library, PHP is not a very good language. Overall we use javascript and PHP because they are used for two completely different things.
Does JavaScript interact with PHP?
Yes, JavaScript and PHP can interact with each other in web development. JavaScript is a client-side scripting language that runs in a user's browser, while PHP is a server-side language that runs on the server. The two languages can communicate with each other through the use of AJAX (Asynchronous JavaScript and XML) requests. JavaScript can make an AJAX request to a PHP script on the server, and the PHP script can process the request and return data back to the JavaScript code. This allows for dynamic, interactive web pages that can update their content without requiring a full page refresh. Overall, JavaScript and PHP are complementary technologies that can work together to create powerful web applications
How do you use settime out in php?
we cant use set timeout function in php because it is of java script function
How do you add code for printing document in php code?
You cannot call the print function from within PHP code. This is mainly because the PHP code is run server-side, and the printer is firmly part of the client's individual setup. That said, you can use JavaScript to politely ask the browser to print the document. The call will cause the browser to bring up its default print dialog. The specific JavaScript method you're after is window.print();
How do you pass table values from one page to another using HTML?
You cant you have to use php or javascript.
How do you create a web mail script using PHP?
You can use phpMailer() Or, you can use mail() PHP function to send emails via PHP script.
What is the php code to close the existing window using button?
It is not a PHP code but a Javascript code. w3schools.com has all the answers you need about Javascript. It will teach you how to use the code and implement it into your website. If you're creating your own websites I suggest you actually learn the code. It will come in handy later on.
