October 5, October 5, Skip to content Sometimes we need to access the PHP variables in javascript or jquery for the use in the application. If you have any queries related to this post, please comment below i would love to help you. Spread the love. Related Posts. I know there are lots of ways to define a JavaScript variable, but this is the one I find works in the most circumstances.
The JS variable needs to be defined before you actually use it anywhere. Additionally, you should be aware that if your variable is not a string and is instead a number, you would want to define it without the quotes around it, i. But for simple strings and variables, this should do the trick. Hard to go wrong with any of this.
Let me know if you have any problems! Never worry about missing important WordPress updates again by subscribing to our newsletter. You can of course get the value of this variable however you need. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 7 years, 8 months ago. Active 1 month ago. Viewed k times. Madara's Ghost Madara's Ghost k 49 49 gold badges silver badges bronze badges.
Was the missing closing parenthesis in myPlugin. Is it true that "this works sometimes"? Add a comment. Active Oldest Votes. Echo the data directly to JavaScript. Use AJAX to get the data you need from the server This method is considered the best, because your server side and client side scripts are completely separate. Without mixing the two, you get more readable code on both languages.
Sometimes you just don't want to wait for the information, load the page, and have the information reach whenever. Data is not directly found on the markup - This means that your markup is kept clean of any additional data, and only JavaScript sees it.
You may need this information e. Pros Fast - DOM operations are often quick, and you can store and access a lot of data relatively quickly. Harder to get structured data - Structured data will have to be valid HTML, otherwise you'll have to escape and convert strings yourself.
Implementation Example With this, the idea is to create some sort of element which will not be displayed to the user, but is visible to JavaScript. Echo the data directly to JavaScript This is probably the easiest to understand. Pros Very easily implemented - It takes very little to implement this, and understand. Peter Mortensen I disagree with "Highly insecure!! What about the significant overhead and code complexity asynchronousity introduces when making an AJAX request? SecondRikudo In method 3, that example can kill the website.
See this question for details. Show 25 more comments. This answer actually seems the simplest to me for most people's purposes. You've earned an upvote! I agree, not wanting to over-analyze and implement a fancy solution for a simple problem. I agree this is the best option. It solves all the security issues, without the latency. It's also more semantic. Show 7 more comments. I'm going to try a simpler answer: Explanation of the problem First, let's understand the flow of events when a page is served from our server: First PHP is run, it generates the HTML that is served to the client.
So, that leaves our options to: Send more requests from the client after the initial request is done. Encode what the server had to say in the initial request. Solutions That's the core question you should be asking yourself is: Am I writing a website or an application? Website Sending more requests from the client after the initial request is done is slow as it requires more HTTP requests which have significant overhead.
You have two ways to tackle the issue Set a cookie - cookies are headers sent in HTTP requests that both the server and client can read. Cookies are good for a little data. This is what tracking services often do. Application If you're writing an application - suddenly the initial load time isn't always as important as the ongoing performance of the application, and it starts to pay off to load data and code separately. Benjamin Gruenbaum Benjamin Gruenbaum k 82 82 gold badges silver badges bronze badges.
OK, you got me there. You'd have to explicitly tell it not to do that. Show 6 more comments. Your awesome! The one line code answer is always the best! Simply use one of the following methods.
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