How to use php code

how to use php code

PHP in Visual Studio Code

PHP is a server scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft's ASP. PHP 7 is the latest stable release. Start learning PHP now». Nov 24,  · The first is to embed the PHP code in your HTML file itself with extension—this requires a special consideration, which we’ll discuss in a moment. The other option, the preferred way, is to combine PHP and HTML tags files. Since PHP is a server-side scripting language, the code is interpreted and run on the server Sajal Soni.

Want to write better code? Check out our free transaction tracing tool, Prefix! When you need a simple way to debug programs and you have no other options, you can usually output values. In PHP, you can use various loggers to log debug messages. When the program is run in debug mode or coode log level is set to debug, these messages will end up in your stdout, stderr, or log files.

Let me backup to some simple ways to output values. There are other functions you can use for debugging through outputs.

These functions are a quick way cofe debug your PHP code. You can see them in action in howw Paiza. Each function has a purpose and can be useful for debugging. PHP has a few ways to configure error reporting. You can use the php. Otherwise, you might use the htaccess configuration.

This uae possible, but think about how you would change modes after deploying sue application. A combination of hhow will get you the right levels of error logging. The PHP manual spells out these settings in more detail and provides more information I could ever fit in this section. But even with the best logging settings, you still need to monitor for errors. First, you have to core about the errors. Unless you have all day and night to hover over the logs, you will not know when something bad is happening!

The best thing you can do is send your PHP logs to a service that will usse a few key things for you:. You can configure many of the PHP logging utilities to work us Stackify Retrace by following this guide. Retrace works with PHP, and it does all of these things for you. Plus, it automatically collects lightweight traces—and only when it should. Sure, Retrace is a great tool for detecting bugs! But once you detect them, fix them.

Often that means attaching a debugger. Now we will talk about debugging by stepping through code. With a web app or website, debugging what is the soil conservation service often two-pronged.

With enough detail in the logs, this should be easy. We might not even have to use a debugger. Often, the less use one, the better.

Coee can debug PHP using one how to get a peace officer license in texas many debugging tools to attach a debugger client. PhpStorm works with debug utilities like Xdebug and ZendDebugger. See, the debug server a Zend extension opens a port, and the client communicates how to use php code the server through that port. The steps here are the same no matter what IDE you use. Xdebug opens an HTTP port so hwo your debugger can attach.

The client still needs to be configured to attach and use the debugging protocol. I will run through that part now. After installing Xdebug, you still need to configure your IDE to attach to the debugger. In VS Now, this means adding a debug configuration. Fortunately, this is automatic at this point. Communications with the debugger happen through a TCP port on the debug server. Xdebug uses the DBGp protocol through port by hwo.

That file goes into a. Those are available in the debug view. We can either attach ude a running server or launch a new one with the current script. Most debuggers have a similar control mechanism. This allows you to start, stop, step, and restart your debugger. Stepping through code is as much an art as it is science. The first thing you need to do is set up a breakpoint usr you think you have an issue. Usually, clicking in the left margin will coce a breakpoint on the nearest line.

You can also set your cursor on the line and hit F9. A red dot should appear in the left margin. This shows a breakpoint. I set a single breakpoint. Now, when I right-click the red breakpoint circle in the margin next to the code, you can choose Edit xode to set up conditions if you need to.

Conditions are useful, especially if you have an entire collection but only one element is causing an issue. I use how to make spaghetti squash recipes all the time! Besides conditional breakpoints, you have the option to log a ro and break after a certain number of hits. The latter is useful when you have code that repeats without a specific unique value to trigger a break on. For example, you might have code to render components in a collection of components.

If the 13th component causes a catastrophe, you can just set the hit count to Stepping through code is a complex operation. The pphp will evaluate variables, you can set watches on variables, and you have access to the call stack. Some languages allow you to go backward in time.

Place a breakpoint phpp the phpinfo line. With your PHP server serving the page and your debugger attached, reload pnp web page. If all goes well, your debugger will light up and pause on that line.

You now have an active debug session. Follow these steps to move along through the code:. This little mismatch can trip you up when you switch between browser tools and your IDE. Just set a breakpoint just past the loop and use F5 to skip ahead to that point. Often, you want to step into the loop at least once before you pass it by. Use F11 to step into it. Just place your cursor somewhere past the loop and use this option to jump to that point. The debugger will run from its current position to the cursor when I select this option.

One key benefit of debugging is that you can check variables as you step through the code. Most IDEs include a way to check local and global variables. You can also watch expressions! This is great when you want to see how a pho expression inside an if statement will evaluate. Just copy the expression into a watch and you can track the result as values change. In VS Code, you can highlight an expression in the code and open the context menu to watch the expression.

You can also evaluate any expression in the debug console! You can evaluate expressions in the debug console too. You can also check the context menu for an option to evaluate the selected expression. Here are things you can do in the debug console:. This is a highly in-depth topic, but the best way to learn is by doing. Click here to read more about the acquisition. Try Our Free Code Profiler. Try Our Code Profiler. By Role. By Technology. By Language.

Documentation Support Ideas Portal Menu. Start Free Trial. Tip: Find application errors and performance problems what does high impact polystyrene mean with Stackify Codd. Troubleshooting and optimizing your code is easy with integrated errors, logs and code level performance insights.

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Running PHP from the command line

PHP in Visual Studio Code Visual Studio Code is a great editor for PHP development. You get features like syntax highlighting and bracket matching, IntelliSense (code completion), and snippets out of the box and you can add more functionality through community-created VS Code extensions. Apr 30,  · Run a PHP File in the Browser for Development With XAMPP If you want to run a PHP file in the browser on your own computer, you'll need to set up a PHP development stack. You’ll need at least PHP, MySQL, and a server like Apache or Nginx. MySQL is used to set up databases your PHP applications can work Sajal Soni. Sep 14,  · The simplest way to use PHP's command line is to run a existing PHP script from it. There are a few things that are different, for example the $_SERVER variable holds some different options, appropriate to the platform, but otherwise everything works .

This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. The wikiHow Tech Team also followed the article's instructions and verified that they work. This article has been viewed , times. Learn more PHP is a server scripting language used to make web pages interactive.

It became widely popular due to its ease of use, interactivity within web pages, and integration with HTML. Think of what happens when a page is edited on this website. Behind this process are many, perhaps hundreds, of PHP scripts controlling how web pages change based on a variety of circumstances. This article will teach you how to write a few very simple PHP scripts so that you can get a basic understanding of how PHP works. Log in Social login does not work in incognito and private browsers.

Please log in with your username or email to continue. No account yet? Create an account. Edit this Article. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. Cookie Settings. Learn why people trust wikiHow. Download Article Explore this Article parts. Sample PHP Scripts. Tips and Warnings. Things You'll Need. Related Articles. Part 1 of Open a text editor.

This is the program you will be using write and edit your code. Type a simple statement into Notepad. The text you want to echo must be enclosed in quotation marks and end in a semi-colon. In Notepad, add. This ensures the file will not be converted into a basic text file by Notepad.

Without the quotation marks, the file will become hello world. In TextEdit, no quotations marks are necessary, but a popup will appear asking you to verify that you want the file saved as. Access the PHP file with a web browser. Your browser window should display the echo statement. If you receive an error message, make sure you typed the code correctly as shown above, including the colon.

Also make sure that your file is saved into the correct directory. Part 2 of Understand the statement between the tags. Statements are used to tell the PHP engine to do something. In the case of an echo statement, you are telling the engine to print what is inside the quotes. The PHP engine itself never actually prints anything to your screen.

Any output generated by the engine is sent to your browser as HTML. Your browser does not know that it's getting PHP output. As far as the browser is concerned, it's getting plain HTML. Use HTML tags to make your statement bold. Adding HTML tags can alter the output of the php statement. Note that these tags appear on the outside of the text, but inside of the quotations marks of the echo statement. Save and open the file in the browser.

The output is the same as before, but this time the text is in bold. Edit the file to add a second echo statement. Remember, statements need to be separated by a semicolon.

Save and run the file as "hello world double. The page will display two echo statements, listed in order, on two lines. This is HTML markup to insert a line break. If you didn't add this, your output would look like this: Hello World! How are you doing?

Part 3 of Think of variables as containers for data. To manipulate data, be it numbers or names, you need to store the data in a container. This process is called declaring the variable. All variables must start with the dollar sign, but the name of the variable can be anything. In the above example, the value is "Hello World! You're telling PHP to store the value at the right of the equal sign, into the variable at the left of the equal sign.

A variable containing a text value is known as a string. Call the variable. Referring to a variable in the code is known as a call. Declare your variable, then echo the variable instead of typing out the text. Save and run the file. The output looks the same as printing plain text, but how it was achieved is different. Use variables with numbers. Variables can also contain numbers known as integers , and then those numbers can be manipulated using simple mathematical functions.

Assign integer values to the first two variables. Note that integer values do not need to be contained in quotation marks. Use the third variable to calculate and print the sum of the other variables.

Using a mathematical function, the machine will calculate the sum for you. To print the variable, you need only add an echo statement that calls the variable after the declaration. Save the file and run this script. Your browser window will display a single number.

Review your string variables. Using a variable to store text allows you to call that variable any time you want to use the store value instead of constantly typing out the contained text.

It also allows for more complex manipulation of the stored data moving forward. Review your integer variables. You have explored basic manipulation of integer variables by using a mathematical function. The resulting data can be stored into another variable. This is only the beginning of what can be accomplished with these variables. This value can change with alterations to either of the included variables. Support wikiHow and unlock all samples.

Include your email address to get a message when this question is answered. By using this service, some information may be shared with YouTube. This article assumes you've installed Apache and PHP on your computer. Helpful 4 Not Helpful 0. Commenting is important with any programming, so make sure you know how to comment in PHP as well. Helpful 1 Not Helpful 2. Helpful 0 Not Helpful 0. Submit a Tip All tip submissions are carefully reviewed before being published.

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