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Written by Flavio Copes. Updated June And it powers a lot of different frameworks that make Web Development easier, like Laravel. Speaking of Laravel, that might be the one reason to learn PHP these days. PHP is a very polarizing language. Some people love it, some people hate it. If we move one step above the emotions and we look at the language as a tool, PHP has a lot to offer.

As a language, it had a humble beginning. It was first created in by Rasmus Lerdorf to create his personal website. Programming languages are divided into groups depending on their characteristics. Those languages are compiled and the compiler generates an executable program that you then run.

You tell the interpreter to run the program. A completely different workflow. PHP is a dynamically typed language. The types of variables are checked at runtime, rather than before the code is executed as it happens for statically typed languages which also happen to be compiled, the two characteristics often go hand in hand. PHP is also loosely weakly typed. Often the compiled can be a great help to anticipate possible problems. But on the other hand, an interpreted language has more flexibility.

In its nature, PHP is similar to JavaScript, another dynamically typed, loosely typed and interpreted language. PHP supports object-oriented programming, and also functional programming. You can use it as you prefer. It is a package that gives you all the tools you need to get up and running. Of course, you can set up each piece on its own if you like, and many tutorials explain how to do that, but I like simple and practical tools and MAMP is one of those. Yours might be different depending on your configuration.

Using MAMP you can find it in the user interface of the application. Something that prints those strings. Apache by default is configured to serve that route serving the index. That file does not exist, but as we have configured Apache to work with PHP, it will then search for an index. That file exists, and PHP code is executed server-side before Apache sends the page back to the browser. We have an ending?

But we discuss plain PHP in this book, so it makes sense to start from the basics. A variable can be assigned any type of value, like strings defined using single or double quotes :. Once a variable is assigned a value, for example a string, we can reassign it a different type of value, like a number:.

We keep the first letter lowercase, and the letters of the subsequent words uppercase. Those work like they do in math. I introduced the use of strings before when we talked about variables and we defined a string using this notation:. The big difference between using single and double quotes is that with double quotes we can expand variables in this way:.

PHP offers you a very comprehensive functions in its standard library the library of functionalities offered by default by the language. A function is composed of an identifier strlen in this case followed by parentheses. Inside those parentheses, we pass one or more arguments to the function. In this case, we have one argument. In this case, it returns the number 6. As with strings and numbers, PHP provides lots of very useful functions for arrays. NOTE: I used cannot instead of can’t because the single quote would terminate my string before it should.

I know the example does not have any logic, but I think it can help you understand how switch works. The break; statement after each case is essential. We have a few different kinds of loops in PHP: while , do while , for , foreach.

It keeps iterating while the condition evaluates to true. In the do while loop first we do the first iteration, then we check the condition. For example you want to stop a for loop when the value of the variable in the array is ‘b’ :. This makes the loop completely stop at that point, and the program execution continues at the next instruction after the loop. If you just want to skip the current loop iteration and keep looking, use continue instead:.

You can use functions to group together multiple instructions, multiple lines of code, and give them a name. For example you can make a function that sends an email. You can pass arguments to a function, for example when you send an email you want to send it to someone, so you add the email as the first argument:.

Inside the function definition we get this parameter in this way we call them parameters inside the function definition, and arguments when we call the function :. A function can return a value. Only one value can be returned from a function, not more than one. You do that using the return keyword. If omitted, the function returns null. The returned value is super useful to know the result of the work done in the function, or to use its result after calling it:.

When the function ends, it just stops existing:. Variables defined outside of the function are not accessible inside the function.

Instead you return a value from the function, and the outside code that calls the function will take responsibility for updating the outside variable. To call them, you invoke the variable with parentheses at the end:. Note that you need a semicolon after the function definition, but then they work like named functions for return values and parameters.

Interestingly, they offer a way to access a variable defined outside the function through use :. Note that as the next example shows arrow functions have automatic access to the variables of the enclosing scope, without the need of use. Arrow functions are super useful when you need to pass a callback function. So we have in total 3 kinds of functions: named functions , anonymous functions , and arrow functions.

Those 3 built-in PHP functions take an array, and a callback function that in each iteration takes each item in the array. If you omit that, the default value is 0 but that would not work for our multiplication example. Object-oriented programming is useful to create useful abstractions and make our code simpler to understand and manage. You can create multiple objects from the same class, by assigning each object to a different variable:.

Those objects will all share the same characteristics defined by the class, but once they are instantiated, they will have a life of their own. They work like variables, but they are attached to the object, once instantiated from the class.

The public keyword is the access modifier and sets the property to be publicly accessible. That is called access modifier. You could use 2 other kinds of access modifiers: private and protected.

Private makes the property inaccessible from outside the object. Only methods defined inside the object can access it. Like for properties, you can mark methods as private too, or protected , to restrict its access.

This is such a common thing that PHP starting in PHP 8 includes something called constructor promotion where it automatically does this thing:. We can enforce properties to have a specific type between string , int , float , string , object , array , bool and others. The fun in object oriented programming starts when we allow classes to inherit properties and methods from other classes. Every animal has an age, and every animal can eat.

So we add a age property and an eat method:. A dog is an animal and has an age and can eat too, so the Dog class instead of reimplementing the same things we have in Animal can extend that class:. We can now instantiate a new object of class Dog and we have access to the properties and methods defined in Animal :.

In this case we call Dog the child class and Animal the parent class. Now that we introduced inheritance we can discuss protected. We already saw how we can use the public access modifier to set properties and methods callable from outside of a class, by the public.

What happens if we have a eat method in Animal and we want to customize it in Dog? We can override that method. We reference them from inside the class using the keyword self , which points to the class:. From inside the class, we can reference them using the self keyword, which refers to the current class:.

You can loop over all the public properties in an object using a foreach loop, like this:. Magic methods are special methods that we define in classes to perform some behavior when something special happens. There are others.

 
 

 

FastCGI Error in MAMP Pro When Uploading Files In Craft CMS – Stack Overflow

 
Please note that this topic is not specific to Craft CMS. Create a free Team Why Teams? Thank you! Local is near perfection. Find centralized, trusted content and collaborate around the technologies you use most.

 
 

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Many developers prefer MAMP for their local development environment. Please note that this topic is not specific to Craft CMS. Craft 3 mamp pro free Composer on the command line is not a requirement to work with Craft 3. When you run composer on the command line, it runs under the PHP executable that the terminal session is configured to use. You can see which PHP executable your terminal session will use by running which php.

Remember that php version. Next, make sure you have a. Now go to your user folder, find and edit. Add this line to the top:. Change php7. When you type a command in your terminal, it searches for the перейти matching executable in a list of colon-separated directories specified in the PATH variable.

To verify the change, exit your terminal window craft 3 mamp pro free open a new one. Run which php and you should see something like:. Changes made to. PHP 7. If you look at the composer. Edit the. Close craft 3 mamp pro free terminal session and open посетить страницу источник new one. MAMP runs slowly compared to production servers, so it needs extra time to do things. It источник статьи needs plenty of memory allocated to PHP.

Edit the php. Check out our Getting Started Tutorial. Our community is active and eager to help. Join us on Discord or Stack Exchange. Knowledge Base Troubleshooting. Search Knowledge Base. Set Important php. Applies to Craft CMS 3. More in Troubleshooting. Troubleshooting Composer Errors. Troubleshooting Database Connection Issues. How to Temporarily Disable a Plugin.

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By |2022-11-30T08:17:19+00:00November 30th, 2022|sfk|0 Comments

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