Có 20+ tài liệu thuộc chủ đề "học PHP"
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Table of Contents. Test Your Knowledge: Questions 11. Test Your Knowledge: Questions 32. Test Your Knowledge: Questions 58. Test Your Knowledge: Questions 87. iv | Table of Contents. Test Your Knowledge: Questions 113. Table of Contents | v. Test Your Knowledge: Questions 128. Test Your Knowledge: Questions 155. vi | Table of Contents. Test Your Knowledge: Questions 198. Test Your...
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Test Your Knowledge: Questions 296. Test Your Knowledge: Questions 318. Test Your Knowledge: Questions 335. Test Your Knowledge: Questions 353. Test Your Knowledge: Questions 375. Test Your Knowledge: Questions 391. Test Your Knowledge: Questions 403. rnfunctions.php 406. rnheader.php 409. rnsetup.php 410. index.php 411. rnsignup.php 412. rnsignup.php (YUI version) 415. rncheckuser.php 417. rnlogin.php 417. rnprofile.php 419. rnmembers.php 424. rnfriends.php 427. rnmessages.php...
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Introduction to Dynamic Web Content. The World Wide Web is a constantly evolving network that has already traveled far beyond its conception in the early 1990s, when it was created to solve a specific prob- lem. State-of-the-art experiments at CERN (the European Laboratory for Particle Phys- ics—now best known as the operator of the Large Hadron Collider) were producing incredible...
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we’ll explore many additional things that you can do with it in the Ajax chapters later in this book.. In Chapter 2, we’ll look at how you can install your own web devel- opment server on which to practice everything that you will be learning.. If you encounter a bug (which is rare) in one of the open source tools,...
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You are now ready to run the MAMP for the first time. Double-click the MAMP program and you’ll see the main control window appear, along with the welcome page, which will display in your default web browser.. The Apache and MySQL servers should start automatically and display their status in the control window. If they don’t, you can click on...
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Table 2-1 lists some of the most popular PHP IDEs, along with their download URLs.. A selection of PHP IDEs. Armed with these tools, you are now ready to move on to Chapter 3, where we’ll start exploring PHP in further depth and find out how to get HTML and PHP to work together, as well as how the PHP...
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To then return the third element in the second row of this array, you would use the following PHP command, which will display an “x”:. It will return the contents of the matchbox three along and two down.. Variable names must start with a letter of the alphabet or the _ (underscore) character.. The variable $High_Score is not the same...
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PHP comes ready-made with dozens of predefined constants that you generally will be unlikely to use as a beginner to PHP. However, there are a few—known as the magic constants—that you will find useful. The names of the magic constants always have two underscores at the beginning and two at the end, so that you won’t accidentally try to name...
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In this chapter, you will get a thorough grounding in how PHP programming works in practice and how to control the flow of the program.. 9” (20 is greater than 9) is TRUE , and the expression “5. For each line, it prints out a letter between a and d , followed by a colon and the result of the...
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In the case of an if statement, you could imagine coming across a detour sign that you have to follow if a certain condition is TRUE . The contents of the if condition can be any valid PHP expression, including equality, comparison, tests for zero and NULL , and even the values returned by functions (either built-in functions or ones...
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Example 4-31 shows a modified version of the multiplication table for 12 code using such a loop.. Of course, if you have more than a single statement inside a do...while loop, remember to use curly braces, as in Example 4-32.. Example 4-33 shows how you could write the multiplication table program with a for loop.. Outputting the times table for...
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As you can see, the strrev function reversed the order of characters in the string, str_repeat repeated the string “Hip ” twice (as required by a second argument), and strtoupper converted “hooray!” to uppercase.. The first line of the syntax indicates that:. Function names are case-insensitive, so all of the following strings can refer to the print function: PRINT ,...
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The _r stands for “in human readable format.” In the case of the new object $object , it prints the following:. User Object ( [name] =>. Creating an Object. To create an object with a specified class, use the new keyword, like this: object = new Class . On the first line, we simply assign an object to the User...
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echo "[Class Dad] I am your Father<br />";. echo "[Class Son] I am Luke<br />";. If you wish to ensure that your code calls a method from the current class, you can use the self keyword, like this:. When you extend a class and declare your own constructor, you should be aware that PHP will not automatically call the constructor...
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A simple design feature in PHP’s array syntax makes it possible to create arrays of more than one dimension. echo "<pre>";. echo "</pre>";. To make things clearer now that the code is starting to grow, I’ve renamed some of the elements. Once the array data has been assigned, I use a pair of nested foreach...as loops to print out the...
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Not only can you specify a conversion type, you can also set the precision of the dis- played result. To ensure that such values are correctly stored internally, but displayed with only two digits of precision, you can insert the string “.2” between the % symbol and the conversion specifier:. printf("The result is: $%.2f . The result is $10.29. But...
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As with moving a file, a warning message will be displayed if the file doesn’t exist, which you can avoid by using file_exists to first check for its existence before calling unlink. Often you will want to add more data to a saved file, which you can do in many ways.. You can use one of the append write modes...
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But what’s the difference between the two markup languages?. As more and more devices such as iPhones and BlackBerries become web-enabled, it is increasingly important to ensure that web content looks good on them as well as on a computer’s web browser. This incorporates the contents from the HTML 4.01 standard but requires the use of XML syntax.. This version...
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But first you should type the following to log in to your MySQL system:. If you have a password, enter it. Once you are logged in, type the following to test the program—you should see some- thing like Figure 8-3 in response:. If this procedure fails at any point, please refer to the section “Installing a LAMP on Linux” on...