Programming via PHP: Simple programs. A first program. Let us begin with a very simple PHP program. Create a file. (named random. Random number< /title> < /head> < body> < p> I have chosen < ? You can install it on the Web server; if the Web server supports. PHP, then when you load it into your Web browser you'll see something. I have chosen 4. 7. Let's try to make sense of this simple program. The first thing. you'll notice is that our PHP program is basically HTML. In fact. when the Web server sees a PHP file, it sends the page to the Web. Thus, when the browser requests the file, the. Uh- oh. Here comes some PHP that tells me that I have to do. In this program, the server would see the statement. Web server. should send a random number between 1 and 1. Then it sees ?> , whereupon the server. Whew! I'm past all that work. Now I can go back to. So it goes. along. The overall result of the above process is that when a Web browser. Web page, the server actually sends the following HTML to. Random Number< /title> < /head> < body> < p> I have chosen 4. Create secure and sharable online database using Zoho Creator online database software. Data collection made simple. Your online database is a centralized. Create custom database software on your own and publish them online with zero delay. Database Software, Online Database or Business Apps. The world's most popular open source database MySQL.com; Downloads; Documentation; Developer Zone; Developer Zone Documentation Downloads. Notice that the Web page that the browser receives straight HTML. Web page were a simple HTML file. Because the browser. PHP, there is no reason for us as PHP programmers to. As long as the browser supports HTML, it. PHP pages. The echo statement. PHP programs consist of a sequence of statements. In processing PHP code, the server. PHP. When the Web. Web browser. Whatever comes between the. The bit between echo and the semicolon are a bit odd. What is going on here is that we are using something called a. You probably remember seeing functions in. We would call x the parameter for. It happens that rand is one of the functions in the. PHP. Whenever we want to use the function. Variables. Sometimes in writing a program, we want the computer to temporarily. Suppose, for example. We would want to use the number in two different. In one, we want to display the chosen. How to Select the Best Database Software: Know Your Database Software Types. Here's the various database types: Desktop: A simple. Creating a Simple Web Application Using a MySQL Database. Setting Up a Simple Database with PHP. The rest is plain HTML. A very simple to use program that acts like an SQL database to help keep track of and search through any data you wish to store. You define the field names of a. Simple database access sample application. Simple database software social advice. The simple and straightforward. We need a way to remember the selected value from one statement to. To do this, we use a programming concept called a. In PHP, variable names must always begin with a dollar sign. To create a variable, we use an assignment. Here is a simple. In this case, the variable I am creating is named. I am assigning the name to refer to the value. Now we can look at the PHP program to choose a random number and. Random< /title> < /head> < body> < p> I have randomly selected the number < ? Its square root is < ? When the Web server reaches the PHP code, it will see that it is. It says to assign the. Having completed that assignment statement, it goes onto the next. It sees that the second statement is an echo. Web. browser. When it then reaches the two- character sequence. PHP code, and it begins sending letters to. Web browser as part of the HTML. But it soon reaches the. PHP. In this case, it finds another echo statement to. As. an echo statement, it will send the sqrt. The upshot of all this is that the user will see the following Web. Web server ends up choosing the number. I have randomly selected the number 6. Its square root is 8. If the user then reloads the page, the Web server would probably. It's instructive to consider the result of changing our program in a. Let me ask them as questions first, to give you a chance. Suppose we were to eliminate the statement. PHP program. What would. Suppose we try to eliminate the $choice variable by. I have randomly selected the number < ? Its square root is < ? What would happen then? The answer to our first question is that if we omitted the. Web server would. Web server. A user who loaded the page would see something like the. I have randomly selected the number . Its square root is 8. Notice: When a Web server executes an assignment statement, it. Web browser. It simply remembers the value. This may not be the intuitive behavior to you, but. For our second question, the Web server would end up asking the. Now it. happens that the rand function responds with a different value. So the user may see something like the following. I have randomly selected the number 4. Its square root is 2. White space and capitalization. One thing you'll notice in the above examples is that I've been. PHP code and placing. Actually, lines. breaks and spaces are irrelevant in PHP (just as the are irrelevant in. HTML). I could instead have written our random square- root program. Random< /title> < /head> < body> < p> I have randomly selected the number. In fact, this convention of breaking lines with each statement is. Later, we'll see that sometimes. Indenting your PHP is less important. I've been doing it just to. HTML. When I write my own PHP. I often don't indent the PHP.)Another important point in PHP concerns capitalization: The. PHP. Generally. speaking, the easiest thing to name your variables using all lower- case.
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